[SCSI] stex: use sg buffer copy helper functions

This replaces stex_internal_copy with scsi_sg_copy_to/from_buffer.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Ed Lin <ed.lin@promise.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

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

1 files changed, 10 insertions, 56 deletions

diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index 654430edf74d..8c7b1830d9e8 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -426,49 +426,13 @@ static int stex_map_sg(struct st_hba *hba,
         return 0;
 }
 
-static void stex_internal_copy(struct scsi_cmnd *cmd,
-        const void *src, size_t *count, int sg_count, int direction)
-{
-        size_t lcount;
-        size_t len;
-        void *s, *d, *base = NULL;
-        size_t offset;
-
-        if (*count > scsi_bufflen(cmd))
-                *count = scsi_bufflen(cmd);
-        lcount = *count;
-        while (lcount) {
-                len = lcount;
-                s = (void *)src;
-
-                offset = *count - lcount;
-                s += offset;
-                base = scsi_kmap_atomic_sg(scsi_sglist(cmd),
-                                           sg_count, &offset, &len);
-                if (!base) {
-                        *count -= lcount;
-                        return;
-                }
-                d = base + offset;
-
-                if (direction == ST_TO_CMD)
-                        memcpy(d, s, len);
-                else
-                        memcpy(s, d, len);
-
-                lcount -= len;
-                scsi_kunmap_atomic_sg(base);
-        }
-}
-
 static void stex_controller_info(struct st_hba *hba, struct st_ccb *ccb)
 {
         struct st_frame *p;
         size_t count = sizeof(struct st_frame);
 
         p = hba->copy_buffer;
-        stex_internal_copy(ccb->cmd, p, &count, scsi_sg_count(ccb->cmd),
-                           ST_FROM_CMD);
+        count = scsi_sg_copy_to_buffer(ccb->cmd, p, count);
         memset(p->base, 0, sizeof(u32)*6);
         *(unsigned long *)(p->base) = pci_resource_start(hba->pdev, 0);
         p->rom_addr = 0;
@@ -486,8 +450,7 @@ static void stex_controller_info(struct st_hba *hba, struct st_ccb *ccb)
         p->subid =
                 hba->pdev->subsystem_vendor << 16 | hba->pdev->subsystem_device;
 
-        stex_internal_copy(ccb->cmd, p, &count, scsi_sg_count(ccb->cmd),
-                           ST_TO_CMD);
+        count = scsi_sg_copy_from_buffer(ccb->cmd, p, count);
 }
 
 static void
@@ -554,10 +517,8 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
                 unsigned char page;
                 page = cmd->cmnd[2] & 0x3f;
                 if (page == 0x8 || page == 0x3f) {
-                        size_t cp_len = sizeof(ms10_caching_page);
-                        stex_internal_copy(cmd, ms10_caching_page,
-                                           &cp_len, scsi_sg_count(cmd),
-                                           ST_TO_CMD);
+                        scsi_sg_copy_from_buffer(cmd, ms10_caching_page,
+                                                 sizeof(ms10_caching_page));
                         cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
                         done(cmd);
                 } else
@@ -586,10 +547,8 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
                 if (id != host->max_id - 1)
                         break;
                 if (lun == 0 && (cmd->cmnd[1] & INQUIRY_EVPD) == 0) {
-                        size_t cp_len = sizeof(console_inq_page);
-                        stex_internal_copy(cmd, console_inq_page,
-                                           &cp_len, scsi_sg_count(cmd),
-                                           ST_TO_CMD);
+                        scsi_sg_copy_from_buffer(cmd, (void *)console_inq_page,
+                                                 sizeof(console_inq_page));
                         cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
                         done(cmd);
                 } else
@@ -606,8 +565,7 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
                         ver.signature[0] = PASSTHRU_SIGNATURE;
                         ver.console_id = host->max_id - 1;
                         ver.host_no = hba->host->host_no;
-                        stex_internal_copy(cmd, &ver, &cp_len,
-                                           scsi_sg_count(cmd), ST_TO_CMD);
+                        cp_len = scsi_sg_copy_from_buffer(cmd, &ver, cp_len);
                         cmd->result = sizeof(ver) == cp_len ?
                                 DID_OK << 16 | COMMAND_COMPLETE << 8 :
                                 DID_ERROR << 16 | COMMAND_COMPLETE << 8;
@@ -700,15 +658,12 @@ static void stex_copy_data(struct st_ccb *ccb,
 
         if (ccb->cmd == NULL)
                 return;
-        stex_internal_copy(ccb->cmd,
-                resp->variable, &count, scsi_sg_count(ccb->cmd), ST_TO_CMD);
+        count = scsi_sg_copy_from_buffer(ccb->cmd, resp->variable, count);
 }
 
 static void stex_ys_commands(struct st_hba *hba,
         struct st_ccb *ccb, struct status_msg *resp)
 {
-        size_t count;
-
         if (ccb->cmd->cmnd[0] == MGT_CMD &&
                 resp->scsi_status != SAM_STAT_CHECK_CONDITION) {
                 scsi_set_resid(ccb->cmd, scsi_bufflen(ccb->cmd) -
@@ -724,9 +679,8 @@ static void stex_ys_commands(struct st_hba *hba,
                 resp->scsi_status == SAM_STAT_GOOD) {
                 ST_INQ *inq_data;
 
-                count = STEX_EXTRA_SIZE;
-                stex_internal_copy(ccb->cmd, hba->copy_buffer,
-                        &count, scsi_sg_count(ccb->cmd), ST_FROM_CMD);
+                scsi_sg_copy_to_buffer(ccb->cmd, hba->copy_buffer,
+                                       STEX_EXTRA_SIZE);
                 inq_data = (ST_INQ *)hba->copy_buffer;
                 if (inq_data->DeviceTypeQualifier != 0)
                         ccb->srb_status = SRB_STATUS_SELECTION_TIMEOUT;