[SCSI] convert sd to scsi_execute_req (and update the scsi_execute_req API)

This one removes struct scsi_request entirely from sd.  In the process,
I noticed we have no callers of scsi_wait_req who don't immediately
normalise the sense, so I updated the API to make it take a struct
scsi_sense_hdr instead of simply a big sense buffer.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

7 files changed, 146 insertions, 173 deletions

diff --git a/drivers/scsi/constants.c b/drivers/scsi/constants.c
index 0d58d3538bdf..f6be2c1c3942 100644
--- a/drivers/scsi/constants.c
+++ b/drivers/scsi/constants.c
@@ -1156,6 +1156,31 @@ scsi_show_extd_sense(unsigned char asc, unsigned char ascq)
         }
 }
 
+void
+scsi_print_sense_hdr(const char *name, struct scsi_sense_hdr *sshdr)
+{
+        const char *sense_txt;
+        /* An example of deferred is when an earlier write to disk cache
+         * succeeded, but now the disk discovers that it cannot write the
+         * data to the magnetic media.
+         */
+        const char *error = scsi_sense_is_deferred(sshdr) ? 
+                "<<DEFERRED>>" : "Current";
+        printk(KERN_INFO "%s: %s", name, error);
+        if (sshdr->response_code >= 0x72)
+                printk(" [descriptor]");
+
+        sense_txt = scsi_sense_key_string(sshdr->sense_key);
+        if (sense_txt)
+                printk(": sense key: %s\n", sense_txt);
+        else
+                printk(": sense key=0x%x\n", sshdr->sense_key);
+        printk(KERN_INFO "    ");
+        scsi_show_extd_sense(sshdr->asc, sshdr->ascq);
+        printk("\n");
+}
+EXPORT_SYMBOL(scsi_print_sense_hdr);
+
 /* Print sense information */
 void
 __scsi_print_sense(const char *name, const unsigned char *sense_buffer,
@@ -1163,8 +1188,6 @@ __scsi_print_sense(const char *name, const unsigned char *sense_buffer,
 {
         int k, num, res;
         unsigned int info;
-        const char *error;
-        const char *sense_txt;
         struct scsi_sense_hdr ssh;
     
         res = scsi_normalize_sense(sense_buffer, sense_len, &ssh);
@@ -1182,26 +1205,7 @@ __scsi_print_sense(const char *name, const unsigned char *sense_buffer,
                 printk("\n");
                 return;
         }
-
-        /* An example of deferred is when an earlier write to disk cache
-         * succeeded, but now the disk discovers that it cannot write the
-         * data to the magnetic media.
-         */
-        error = scsi_sense_is_deferred(&ssh) ? 
-                        "<<DEFERRED>>" : "Current";
-        printk(KERN_INFO "%s: %s", name, error);
-        if (ssh.response_code >= 0x72)
-                printk(" [descriptor]");
-
-        sense_txt = scsi_sense_key_string(ssh.sense_key);
-        if (sense_txt)
-                printk(": sense key: %s\n", sense_txt);
-        else
-                printk(": sense key=0x%x\n", ssh.sense_key);
-        printk(KERN_INFO "    ");
-        scsi_show_extd_sense(ssh.asc, ssh.ascq);
-        printk("\n");
-
+        scsi_print_sense_hdr(name, &ssh);
         if (ssh.response_code < 0x72) {
                 /* only decode extras for "fixed" format now */
                 char buff[80];
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index 5f399c9c68ee..179a767d221d 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -90,19 +90,16 @@ static int ioctl_internal_command(struct scsi_device *sdev, char *cmd,
 {
         int result;
         struct scsi_sense_hdr sshdr;
-        char sense[SCSI_SENSE_BUFFERSIZE];
 
         SCSI_LOG_IOCTL(1, printk("Trying ioctl with scsi command %d\n", *cmd));
 
-
-        memset(sense, 0, sizeof(*sense));
         result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0,
-                                  sense, timeout, retries);
+                                  &sshdr, timeout, retries);
 
         SCSI_LOG_IOCTL(2, printk("Ioctl returned  0x%x\n", result));
 
         if ((driver_byte(result) & DRIVER_SENSE) &&
-            (scsi_normalize_sense(sense, sizeof(*sense), &sshdr))) {
+            (scsi_sense_valid(&sshdr))) {
                 switch (sshdr.sense_key) {
                 case ILLEGAL_REQUEST:
                         if (cmd[0] == ALLOW_MEDIUM_REMOVAL)
@@ -132,7 +129,7 @@ static int ioctl_internal_command(struct scsi_device *sdev, char *cmd,
                                sdev->id,
                                sdev->lun,
                                result);
-                        __scsi_print_sense("   ", sense, sizeof(*sense));
+                        scsi_print_sense_hdr("   ", &sshdr);
                         break;
                 }
         }
@@ -315,9 +312,9 @@ int scsi_ioctl_send_command(struct scsi_device *sdev,
                 break;
         }
 
-        result = scsi_execute_req(sdev, cmd, data_direction, buf, needed,
-                                  sense, timeout, retries);
-                                  
+        result = scsi_execute(sdev, cmd, data_direction, buf, needed,
+                              sense, timeout, retries, 0);
+
         /* 
          * If there was an error condition, pass the info back to the user. 
          */
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 42edf29223ab..bdea26b56dc4 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -293,8 +293,8 @@ EXPORT_SYMBOL(scsi_wait_req);
  * @retries:    number of times to retry request
  * @flags:      or into request flags;
  *
- * scsi_execute_req returns the req->errors value which is the
- * the scsi_cmnd result field.
+ * returns the req->errors value which is the the scsi_cmnd result
+ * field.
  **/
 int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
                  int data_direction, void *buffer, unsigned bufflen,
@@ -328,9 +328,31 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
 
         return ret;
 }
-
 EXPORT_SYMBOL(scsi_execute);
 
+
+int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
+                     int data_direction, void *buffer, unsigned bufflen,
+                     struct scsi_sense_hdr *sshdr, int timeout, int retries)
+{
+        char *sense = NULL;
+                
+        if (sshdr) {
+                sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
+                if (!sense)
+                        return DRIVER_ERROR << 24;
+                memset(sense, 0, sizeof(*sense));
+        }
+        int result = scsi_execute(sdev, cmd, data_direction, buffer, bufflen,
+                                  sense, timeout, retries, 0);
+        if (sshdr)
+                scsi_normalize_sense(sense, sizeof(*sense), sshdr);
+
+        kfree(sense);
+        return result;
+}
+EXPORT_SYMBOL(scsi_execute_req);
+
 /*
  * Function:    scsi_init_cmd_errh()
  *
@@ -1614,7 +1636,7 @@ void scsi_exit_queue(void)
         }
 }
 /**
- *      __scsi_mode_sense - issue a mode sense, falling back from 10 to 
+ *      scsi_mode_sense - issue a mode sense, falling back from 10 to 
  *              six bytes if necessary.
  *      @sdev:  SCSI device to be queried
  *      @dbd:   set if mode sense will allow block descriptors to be returned
@@ -1634,26 +1656,22 @@ void scsi_exit_queue(void)
 int
 scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
                   unsigned char *buffer, int len, int timeout, int retries,
-                  struct scsi_mode_data *data, char *sense) {
+                  struct scsi_mode_data *data, struct scsi_sense_hdr *sshdr) {
         unsigned char cmd[12];
         int use_10_for_ms;
         int header_length;
         int result;
-        char *sense_buffer = NULL;
+        struct scsi_sense_hdr my_sshdr;
 
         memset(data, 0, sizeof(*data));
         memset(&cmd[0], 0, 12);
         cmd[1] = dbd & 0x18;    /* allows DBD and LLBA bits */
         cmd[2] = modepage;
 
-        if (!sense) {
-                sense_buffer = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
-                if (!sense_buffer) {
-                        dev_printk(KERN_ERR, &sdev->sdev_gendev, "failed to allocate sense buffer\n");
-                        return 0;
-                }
-                sense = sense_buffer;
-        }
+        /* caller might not be interested in sense, but we need it */
+        if (!sshdr)
+                sshdr = &my_sshdr;
+
  retry:
         use_10_for_ms = sdev->use_10_for_ms;
 
@@ -1673,12 +1691,10 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
                 header_length = 4;
         }
 
-        memset(sense, 0, SCSI_SENSE_BUFFERSIZE);
-
         memset(buffer, 0, len);
 
         result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buffer, len,
-                                  sense, timeout, retries);
+                                  sshdr, timeout, retries);
 
         /* This code looks awful: what it's doing is making sure an
          * ILLEGAL REQUEST sense return identifies the actual command
@@ -1687,11 +1703,9 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
 
         if (use_10_for_ms && !scsi_status_is_good(result) &&
             (driver_byte(result) & DRIVER_SENSE)) {
-                struct scsi_sense_hdr sshdr;
-
-                if (scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, &sshdr)) {
-                        if ((sshdr.sense_key == ILLEGAL_REQUEST) &&
-                            (sshdr.asc == 0x20) && (sshdr.ascq == 0)) {
+                if (scsi_sense_valid(sshdr)) {
+                        if ((sshdr->sense_key == ILLEGAL_REQUEST) &&
+                            (sshdr->asc == 0x20) && (sshdr->ascq == 0)) {
                                 /* 
                                  * Invalid command operation code
                                  */
@@ -1718,7 +1732,6 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
                 }
         }
 
-        kfree(sense_buffer);
         return result;
 }
 EXPORT_SYMBOL(scsi_mode_sense);
@@ -1729,17 +1742,15 @@ scsi_test_unit_ready(struct scsi_device *sdev, int timeout, int retries)
         char cmd[] = {
                 TEST_UNIT_READY, 0, 0, 0, 0, 0,
         };
-        char sense[SCSI_SENSE_BUFFERSIZE];
+        struct scsi_sense_hdr sshdr;
         int result;
         
-        result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0, sense,
+        result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0, &sshdr,
                                   timeout, retries);
 
         if ((driver_byte(result) & DRIVER_SENSE) && sdev->removable) {
-                struct scsi_sense_hdr sshdr;
 
-                if ((scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE,
-                                          &sshdr)) &&
+                if ((scsi_sense_valid(&sshdr)) &&
                     ((sshdr.sense_key == UNIT_ATTENTION) ||
                      (sshdr.sense_key == NOT_READY))) {
                         sdev->changed = 1;
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 0048beaffc9f..19c9a232a754 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -446,7 +446,6 @@ void scsi_target_reap(struct scsi_target *starget)
 static int scsi_probe_lun(struct scsi_device *sdev, char *inq_result,
                           int result_len, int *bflags)
 {
-        char sense[SCSI_SENSE_BUFFERSIZE];
         unsigned char scsi_cmd[MAX_COMMAND_SIZE];
         int first_inquiry_len, try_inquiry_len, next_inquiry_len;
         int response_len = 0;
@@ -474,11 +473,10 @@ static int scsi_probe_lun(struct scsi_device *sdev, char *inq_result,
                 scsi_cmd[0] = INQUIRY;
                 scsi_cmd[4] = (unsigned char) try_inquiry_len;
 
-                memset(sense, 0, sizeof(sense));
                 memset(inq_result, 0, try_inquiry_len);
 
                 result = scsi_execute_req(sdev,  scsi_cmd, DMA_FROM_DEVICE,
-                                          inq_result, try_inquiry_len, sense,
+                                          inq_result, try_inquiry_len, &sshdr,
                                           HZ / 2 + HZ * scsi_inq_timeout, 3);
 
                 SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: INQUIRY %s "
@@ -493,8 +491,7 @@ static int scsi_probe_lun(struct scsi_device *sdev, char *inq_result,
                          * but many buggy devices do so anyway. 
                          */
                         if ((driver_byte(result) & DRIVER_SENSE) &&
-                            scsi_normalize_sense(sense, sizeof(sense),
-                                                 &sshdr)) {
+                            scsi_sense_valid(&sshdr)) {
                                 if ((sshdr.sense_key == UNIT_ATTENTION) &&
                                     ((sshdr.asc == 0x28) ||
                                      (sshdr.asc == 0x29)) &&
@@ -1057,7 +1054,6 @@ static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
                                 int rescan)
 {
         char devname[64];
-        char sense[SCSI_SENSE_BUFFERSIZE];
         unsigned char scsi_cmd[MAX_COMMAND_SIZE];
         unsigned int length;
         unsigned int lun;
@@ -1134,9 +1130,8 @@ static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
                                 " REPORT LUNS to %s (try %d)\n", devname,
                                 retries));
 
-                memset(sense, 0, sizeof(sense));
                 result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE,
-                                          lun_data, length, sense,
+                                          lun_data, length, &sshdr,
                                           SCSI_TIMEOUT + 4 * HZ, 3);
 
                 SCSI_LOG_SCAN_BUS(3, printk (KERN_INFO "scsi scan: REPORT LUNS"
@@ -1144,7 +1139,7 @@ static int scsi_report_lun_scan(struct scsi_device *sdev, int bflags,
                                 ?  "failed" : "successful", retries, result));
                 if (result == 0)
                         break;
-                else if (scsi_normalize_sense(sense, sizeof(sense), &sshdr)) {
+                else if (scsi_sense_valid(&sshdr)) {
                         if (sshdr.sense_key != UNIT_ATTENTION)
                                 break;
                 }
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 15c2039059c9..611ccde84778 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -59,7 +59,6 @@
 #include <scsi/scsi_eh.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_ioctl.h>
-#include <scsi/scsi_request.h>
 #include <scsi/scsicam.h>
 
 #include "scsi_logging.h"
@@ -125,7 +124,7 @@ static int sd_issue_flush(struct device *, sector_t *);
 static void sd_end_flush(request_queue_t *, struct request *);
 static int sd_prepare_flush(request_queue_t *, struct request *);
 static void sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
-                 struct scsi_request *SRpnt, unsigned char *buffer);
+                             unsigned char *buffer);
 
 static struct scsi_driver sd_template = {
         .owner                  = THIS_MODULE,
@@ -682,19 +681,13 @@ not_present:
 
 static int sd_sync_cache(struct scsi_device *sdp)
 {
-        struct scsi_request *sreq;
         int retries, res;
+        struct scsi_sense_hdr sshdr;
 
         if (!scsi_device_online(sdp))
                 return -ENODEV;
 
-        sreq = scsi_allocate_request(sdp, GFP_KERNEL);
-        if (!sreq) {
-                printk("FAILED\n  No memory for request\n");
-                return -ENOMEM;
-        }
 
-        sreq->sr_data_direction = DMA_NONE;
         for (retries = 3; retries > 0; --retries) {
                 unsigned char cmd[10] = { 0 };
 
@@ -703,22 +696,20 @@ static int sd_sync_cache(struct scsi_device *sdp)
                  * Leave the rest of the command zero to indicate
                  * flush everything.
                  */
-                scsi_wait_req(sreq, cmd, NULL, 0, SD_TIMEOUT, SD_MAX_RETRIES);
-                if (sreq->sr_result == 0)
+                res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
+                                       SD_TIMEOUT, SD_MAX_RETRIES);
+                if (res == 0)
                         break;
         }
 
-        res = sreq->sr_result;
-        if (res) {
-                printk(KERN_WARNING "FAILED\n  status = %x, message = %02x, "
+        if (res) {              printk(KERN_WARNING "FAILED\n  status = %x, message = %02x, "
                                     "host = %d, driver = %02x\n  ",
                                     status_byte(res), msg_byte(res),
                                     host_byte(res), driver_byte(res));
                         if (driver_byte(res) & DRIVER_SENSE)
-                                scsi_print_req_sense("sd", sreq);
+                                scsi_print_sense_hdr("sd", &sshdr);
         }
 
-        scsi_release_request(sreq);
         return res;
 }
 
@@ -957,22 +948,19 @@ static void sd_rw_intr(struct scsi_cmnd * SCpnt)
         scsi_io_completion(SCpnt, good_bytes, block_sectors << 9);
 }
 
-static int media_not_present(struct scsi_disk *sdkp, struct scsi_request *srp)
+static int media_not_present(struct scsi_disk *sdkp,
+                             struct scsi_sense_hdr *sshdr)
 {
-        struct scsi_sense_hdr sshdr;
 
-        if (!srp->sr_result)
-                return 0;
-        if (!(driver_byte(srp->sr_result) & DRIVER_SENSE))
+        if (!scsi_sense_valid(sshdr))
                 return 0;
         /* not invoked for commands that could return deferred errors */
-        if (scsi_request_normalize_sense(srp, &sshdr)) {
-                if (sshdr.sense_key != NOT_READY &&
-                    sshdr.sense_key != UNIT_ATTENTION)
-                        return 0;
-                if (sshdr.asc != 0x3A) /* medium not present */
-                        return 0;
-        }
+        if (sshdr->sense_key != NOT_READY &&
+            sshdr->sense_key != UNIT_ATTENTION)
+                return 0;
+        if (sshdr->asc != 0x3A) /* medium not present */
+                return 0;
+
         set_media_not_present(sdkp);
         return 1;
 }
@@ -981,8 +969,8 @@ static int media_not_present(struct scsi_disk *sdkp, struct scsi_request *srp)
  * spinup disk - called only in sd_revalidate_disk()
  */
 static void
-sd_spinup_disk(struct scsi_disk *sdkp, char *diskname,
-               struct scsi_request *SRpnt, unsigned char *buffer) {
+sd_spinup_disk(struct scsi_disk *sdkp, char *diskname)
+{
         unsigned char cmd[10];
         unsigned long spintime_value = 0;
         int retries, spintime;
@@ -1001,18 +989,13 @@ sd_spinup_disk(struct scsi_disk *sdkp, char *diskname,
                         cmd[0] = TEST_UNIT_READY;
                         memset((void *) &cmd[1], 0, 9);
 
-                        SRpnt->sr_cmd_len = 0;
-                        memset(SRpnt->sr_sense_buffer, 0,
-                               SCSI_SENSE_BUFFERSIZE);
-                        SRpnt->sr_data_direction = DMA_NONE;
+                        the_result = scsi_execute_req(sdkp->device, cmd,
+                                                      DMA_NONE, NULL, 0,
+                                                      &sshdr, SD_TIMEOUT,
+                                                      SD_MAX_RETRIES);
 
-                        scsi_wait_req (SRpnt, (void *) cmd, (void *) buffer,
-                                       0/*512*/, SD_TIMEOUT, SD_MAX_RETRIES);
-
-                        the_result = SRpnt->sr_result;
                         if (the_result)
-                                sense_valid = scsi_request_normalize_sense(
-                                                        SRpnt, &sshdr);
+                                sense_valid = scsi_sense_valid(&sshdr);
                         retries++;
                 } while (retries < 3 && 
                          (!scsi_status_is_good(the_result) ||
@@ -1024,7 +1007,7 @@ sd_spinup_disk(struct scsi_disk *sdkp, char *diskname,
                  * any media in it, don't bother with any of the rest of
                  * this crap.
                  */
-                if (media_not_present(sdkp, SRpnt))
+                if (media_not_present(sdkp, &sshdr))
                         return;
 
                 if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
@@ -1063,14 +1046,9 @@ sd_spinup_disk(struct scsi_disk *sdkp, char *diskname,
                                 cmd[1] = 1;     /* Return immediately */
                                 memset((void *) &cmd[2], 0, 8);
                                 cmd[4] = 1;     /* Start spin cycle */
-                                SRpnt->sr_cmd_len = 0;
-                                memset(SRpnt->sr_sense_buffer, 0,
-                                        SCSI_SENSE_BUFFERSIZE);
-
-                                SRpnt->sr_data_direction = DMA_NONE;
-                                scsi_wait_req(SRpnt, (void *)cmd, 
-                                              (void *) buffer, 0/*512*/, 
-                                              SD_TIMEOUT, SD_MAX_RETRIES);
+                                scsi_execute_req(sdkp->device, cmd, DMA_NONE,
+                                                 NULL, 0, &sshdr,
+                                                 SD_TIMEOUT, SD_MAX_RETRIES);
                                 spintime_value = jiffies;
                         }
                         spintime = 1;
@@ -1083,7 +1061,7 @@ sd_spinup_disk(struct scsi_disk *sdkp, char *diskname,
                         if(!spintime) {
                                 printk(KERN_NOTICE "%s: Unit Not Ready, "
                                         "sense:\n", diskname);
-                                scsi_print_req_sense("", SRpnt);
+                                scsi_print_sense_hdr("", &sshdr);
                         }
                         break;
                 }
@@ -1104,14 +1082,15 @@ sd_spinup_disk(struct scsi_disk *sdkp, char *diskname,
  */
 static void
 sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
-                 struct scsi_request *SRpnt, unsigned char *buffer) {
+                 unsigned char *buffer)
+{
         unsigned char cmd[16];
-        struct scsi_device *sdp = sdkp->device;
         int the_result, retries;
         int sector_size = 0;
         int longrc = 0;
         struct scsi_sense_hdr sshdr;
         int sense_valid = 0;
+        struct scsi_device *sdp = sdkp->device;
 
 repeat:
         retries = 3;
@@ -1128,20 +1107,15 @@ repeat:
                         memset((void *) buffer, 0, 8);
                 }
                 
-                SRpnt->sr_cmd_len = 0;
-                memset(SRpnt->sr_sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
-                SRpnt->sr_data_direction = DMA_FROM_DEVICE;
-
-                scsi_wait_req(SRpnt, (void *) cmd, (void *) buffer,
-                              longrc ? 12 : 8, SD_TIMEOUT, SD_MAX_RETRIES);
+                the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
+                                              buffer, longrc ? 12 : 8, &sshdr,
+                                              SD_TIMEOUT, SD_MAX_RETRIES);
 
-                if (media_not_present(sdkp, SRpnt))
+                if (media_not_present(sdkp, &sshdr))
                         return;
 
-                the_result = SRpnt->sr_result;
                 if (the_result)
-                        sense_valid = scsi_request_normalize_sense(SRpnt,
-                                                                   &sshdr);
+                        sense_valid = scsi_sense_valid(&sshdr);
                 retries--;
 
         } while (the_result && retries);
@@ -1156,7 +1130,7 @@ repeat:
                        driver_byte(the_result));
 
                 if (driver_byte(the_result) & DRIVER_SENSE)
-                        scsi_print_req_sense("sd", SRpnt);
+                        scsi_print_sense_hdr("sd", &sshdr);
                 else
                         printk("%s : sense not available. \n", diskname);
 
@@ -1296,12 +1270,13 @@ got_data:
 
 /* called with buffer of length 512 */
 static inline int
-sd_do_mode_sense(struct scsi_request *SRpnt, int dbd, int modepage,
-                 unsigned char *buffer, int len, struct scsi_mode_data *data)
+sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
+                 unsigned char *buffer, int len, struct scsi_mode_data *data,
+                 struct scsi_sense_hdr *sshdr)
 {
-        return scsi_mode_sense(SRpnt->sr_device, dbd, modepage, buffer, len,
+        return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
                                SD_TIMEOUT, SD_MAX_RETRIES, data,
-                               SRpnt->sr_sense_buffer);
+                               sshdr);
 }
 
 /*
@@ -1310,25 +1285,27 @@ sd_do_mode_sense(struct scsi_request *SRpnt, int dbd, int modepage,
  */
 static void
 sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
-                   struct scsi_request *SRpnt, unsigned char *buffer) {
+                           unsigned char *buffer)
+{
         int res;
+        struct scsi_device *sdp = sdkp->device;
         struct scsi_mode_data data;
 
         set_disk_ro(sdkp->disk, 0);
-        if (sdkp->device->skip_ms_page_3f) {
+        if (sdp->skip_ms_page_3f) {
                 printk(KERN_NOTICE "%s: assuming Write Enabled\n", diskname);
                 return;
         }
 
-        if (sdkp->device->use_192_bytes_for_3f) {
-                res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 192, &data);
+        if (sdp->use_192_bytes_for_3f) {
+                res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
         } else {
                 /*
                  * First attempt: ask for all pages (0x3F), but only 4 bytes.
                  * We have to start carefully: some devices hang if we ask
                  * for more than is available.
                  */
-                res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 4, &data);
+                res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
 
                 /*
                  * Second attempt: ask for page 0 When only page 0 is
@@ -1337,14 +1314,14 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
                  * CDB.
                  */
                 if (!scsi_status_is_good(res))
-                        res = sd_do_mode_sense(SRpnt, 0, 0, buffer, 4, &data);
+                        res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
 
                 /*
                  * Third attempt: ask 255 bytes, as we did earlier.
                  */
                 if (!scsi_status_is_good(res))
-                        res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 255,
-                                               &data);
+                        res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
+                                               &data, NULL);
         }
 
         if (!scsi_status_is_good(res)) {
@@ -1366,19 +1343,20 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
  */
 static void
 sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
-                   struct scsi_request *SRpnt, unsigned char *buffer)
+                   unsigned char *buffer)
 {
         int len = 0, res;
+        struct scsi_device *sdp = sdkp->device;
 
         int dbd;
         int modepage;
         struct scsi_mode_data data;
         struct scsi_sense_hdr sshdr;
 
-        if (sdkp->device->skip_ms_page_8)
+        if (sdp->skip_ms_page_8)
                 goto defaults;
 
-        if (sdkp->device->type == TYPE_RBC) {
+        if (sdp->type == TYPE_RBC) {
                 modepage = 6;
                 dbd = 8;
         } else {
@@ -1387,7 +1365,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
         }
 
         /* cautiously ask */
-        res = sd_do_mode_sense(SRpnt, dbd, modepage, buffer, 4, &data);
+        res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr);
 
         if (!scsi_status_is_good(res))
                 goto bad_sense;
@@ -1408,7 +1386,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
         len += data.header_length + data.block_descriptor_length;
 
         /* Get the data */
-        res = sd_do_mode_sense(SRpnt, dbd, modepage, buffer, len, &data);
+        res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr);
 
         if (scsi_status_is_good(res)) {
                 const char *types[] = {
@@ -1440,7 +1418,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
         }
 
 bad_sense:
-        if (scsi_request_normalize_sense(SRpnt, &sshdr) &&
+        if (scsi_sense_valid(&sshdr) &&
             sshdr.sense_key == ILLEGAL_REQUEST &&
             sshdr.asc == 0x24 && sshdr.ascq == 0x0)
                 printk(KERN_NOTICE "%s: cache data unavailable\n",
@@ -1465,7 +1443,6 @@ static int sd_revalidate_disk(struct gendisk *disk)
 {
         struct scsi_disk *sdkp = scsi_disk(disk);
         struct scsi_device *sdp = sdkp->device;
-        struct scsi_request *sreq;
         unsigned char *buffer;
 
         SCSI_LOG_HLQUEUE(3, printk("sd_revalidate_disk: disk=%s\n", disk->disk_name));
@@ -1477,18 +1454,11 @@ static int sd_revalidate_disk(struct gendisk *disk)
         if (!scsi_device_online(sdp))
                 goto out;
 
-        sreq = scsi_allocate_request(sdp, GFP_KERNEL);
-        if (!sreq) {
-                printk(KERN_WARNING "(sd_revalidate_disk:) Request allocation "
-                       "failure.\n");
-                goto out;
-        }
-
         buffer = kmalloc(512, GFP_KERNEL | __GFP_DMA);
         if (!buffer) {
                 printk(KERN_WARNING "(sd_revalidate_disk:) Memory allocation "
                        "failure.\n");
-                goto out_release_request;
+                goto out;
         }
 
         /* defaults, until the device tells us otherwise */
@@ -1499,25 +1469,23 @@ static int sd_revalidate_disk(struct gendisk *disk)
         sdkp->WCE = 0;
         sdkp->RCD = 0;
 
-        sd_spinup_disk(sdkp, disk->disk_name, sreq, buffer);
+        sd_spinup_disk(sdkp, disk->disk_name);
 
         /*
          * Without media there is no reason to ask; moreover, some devices
          * react badly if we do.
          */
         if (sdkp->media_present) {
-                sd_read_capacity(sdkp, disk->disk_name, sreq, buffer);
+                sd_read_capacity(sdkp, disk->disk_name, buffer);
                 if (sdp->removable)
                         sd_read_write_protect_flag(sdkp, disk->disk_name,
-                                        sreq, buffer);
-                sd_read_cache_type(sdkp, disk->disk_name, sreq, buffer);
+                                                   buffer);
+                sd_read_cache_type(sdkp, disk->disk_name, buffer);
         }
                 
         set_capacity(disk, sdkp->capacity);
         kfree(buffer);
 
- out_release_request: 
-        scsi_release_request(sreq);
  out:
         return 0;
 }
diff --git a/include/scsi/scsi_dbg.h b/include/scsi/scsi_dbg.h
index 12e90934a7a8..b090a11d7e1c 100644
--- a/include/scsi/scsi_dbg.h
+++ b/include/scsi/scsi_dbg.h
@@ -3,8 +3,10 @@
 
 struct scsi_cmnd;
 struct scsi_request;
+struct scsi_sense_hdr;
 
 extern void scsi_print_command(struct scsi_cmnd *);
+extern void scsi_print_sense_hdr(const char *, struct scsi_sense_hdr *);
 extern void __scsi_print_command(unsigned char *);
 extern void scsi_print_sense(const char *, struct scsi_cmnd *);
 extern void scsi_print_req_sense(const char *, struct scsi_request *);
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 5ad08b70763c..da63722c0123 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -9,6 +9,7 @@
 struct request_queue;
 struct scsi_cmnd;
 struct scsi_lun;
+struct scsi_sense_hdr;
 
 struct scsi_mode_data {
         __u32   length;
@@ -237,7 +238,7 @@ extern int scsi_set_medium_removal(struct scsi_device *, char);
 extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
                            unsigned char *buffer, int len, int timeout,
                            int retries, struct scsi_mode_data *data,
-                           char *sense);
+                           struct scsi_sense_hdr *);
 extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,
                                 int retries);
 extern int scsi_device_set_state(struct scsi_device *sdev,
@@ -260,15 +261,10 @@ extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
                         int data_direction, void *buffer, unsigned bufflen,
                         unsigned char *sense, int timeout, int retries,
                         int flag);
+extern int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
+                            int data_direction, void *buffer, unsigned bufflen,
+                            struct scsi_sense_hdr *, int timeout, int retries);
 
-static inline int
-scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
-                 int data_direction, void *buffer, unsigned bufflen,
-                 unsigned char *sense, int timeout, int retries)
-{
-        return scsi_execute(sdev, cmd, data_direction, buffer, bufflen, sense,
-                            timeout, retries, 0);
-}
 static inline int scsi_device_online(struct scsi_device *sdev)
 {
         return sdev->sdev_state != SDEV_OFFLINE;