[SCSI] ses: Use vpd information from scsi_device

The scsi_device now has VPD page83 information attached, so
there is no need to query it again.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 10 insertions, 28 deletions

diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c
index eba183c428cf..80bfece1a2de 100644
--- a/drivers/scsi/ses.c
+++ b/drivers/scsi/ses.c
@@ -25,6 +25,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/enclosure.h>
+#include <asm/unaligned.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -448,27 +449,18 @@ static void ses_enclosure_data_process(struct enclosure_device *edev,
 static void ses_match_to_enclosure(struct enclosure_device *edev,
                                    struct scsi_device *sdev)
 {
-        unsigned char *buf;
         unsigned char *desc;
-        unsigned int vpd_len;
         struct efd efd = {
                 .addr = 0,
         };
 
-        buf = kmalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
-        if (!buf || scsi_get_vpd_page(sdev, 0x83, buf, INIT_ALLOC_SIZE))
-                goto free;
-
         ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
 
-        vpd_len = ((buf[2] << 8) | buf[3]) + 4;
-        kfree(buf);
-        buf = kmalloc(vpd_len, GFP_KERNEL);
-        if (!buf ||scsi_get_vpd_page(sdev, 0x83, buf, vpd_len))
-                goto free;
+        if (!sdev->vpd_pg83_len)
+                return;
 
-        desc = buf + 4;
-        while (desc < buf + vpd_len) {
+        desc = sdev->vpd_pg83 + 4;
+        while (desc < sdev->vpd_pg83 + sdev->vpd_pg83_len) {
                 enum scsi_protocol proto = desc[0] >> 4;
                 u8 code_set = desc[0] & 0x0f;
                 u8 piv = desc[1] & 0x80;
@@ -478,25 +470,15 @@ static void ses_match_to_enclosure(struct enclosure_device *edev,
 
                 if (piv && code_set == 1 && assoc == 1
                     && proto == SCSI_PROTOCOL_SAS && type == 3 && len == 8)
-                        efd.addr = (u64)desc[4] << 56 |
-                                (u64)desc[5] << 48 |
-                                (u64)desc[6] << 40 |
-                                (u64)desc[7] << 32 |
-                                (u64)desc[8] << 24 |
-                                (u64)desc[9] << 16 |
-                                (u64)desc[10] << 8 |
-                                (u64)desc[11];
+                        efd.addr = get_unaligned_be64(&desc[4]);
 
                 desc += len + 4;
         }
-        if (!efd.addr)
-                goto free;
+        if (efd.addr) {
+                efd.dev = &sdev->sdev_gendev;
 
-        efd.dev = &sdev->sdev_gendev;
-
-        enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
- free:
-        kfree(buf);
+                enclosure_for_each_device(ses_enclosure_find_by_addr, &efd);
+        }
 }
 
 static int ses_intf_add(struct device *cdev,