[PATCH] aoe: use get_unaligned for accesses in ATA id buffer

Signed-off-by: "Ed L. Cashin" <ecashin@coraid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Use get_unaligned for possibly-unaligned multi-byte accesses to the
ATA device identify response buffer.

1 files changed, 8 insertions, 7 deletions

diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index b5be4b7d7b5b..5c9c7c1a3d4c 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -8,6 +8,7 @@
 #include <linux/blkdev.h>
 #include <linux/skbuff.h>
 #include <linux/netdevice.h>
+#include <asm/unaligned.h>
 #include "aoe.h"
 
 #define TIMERTICK (HZ / 10)
@@ -311,16 +312,16 @@ ataid_complete(struct aoedev *d, unsigned char *id)
         u16 n;
 
         /* word 83: command set supported */
-        n = le16_to_cpup((__le16 *) &id[83<<1]);
+        n = le16_to_cpu(get_unaligned((__le16 *) &id[83<<1]));
 
         /* word 86: command set/feature enabled */
-        n |= le16_to_cpup((__le16 *) &id[86<<1]);
+        n |= le16_to_cpu(get_unaligned((__le16 *) &id[86<<1]));
 
         if (n & (1<<10)) {      /* bit 10: LBA 48 */
                 d->flags |= DEVFL_EXT;
 
                 /* word 100: number lba48 sectors */
-                ssize = le64_to_cpup((__le64 *) &id[100<<1]);
+                ssize = le64_to_cpu(get_unaligned((__le64 *) &id[100<<1]));
 
                 /* set as in ide-disk.c:init_idedisk_capacity */
                 d->geo.cylinders = ssize;
@@ -331,12 +332,12 @@ ataid_complete(struct aoedev *d, unsigned char *id)
                 d->flags &= ~DEVFL_EXT;
 
                 /* number lba28 sectors */
-                ssize = le32_to_cpup((__le32 *) &id[60<<1]);
+                ssize = le32_to_cpu(get_unaligned((__le32 *) &id[60<<1]));
 
                 /* NOTE: obsolete in ATA 6 */
-                d->geo.cylinders = le16_to_cpup((__le16 *) &id[54<<1]);
-                d->geo.heads = le16_to_cpup((__le16 *) &id[55<<1]);
-                d->geo.sectors = le16_to_cpup((__le16 *) &id[56<<1]);
+                d->geo.cylinders = le16_to_cpu(get_unaligned((__le16 *) &id[54<<1]));
+                d->geo.heads = le16_to_cpu(get_unaligned((__le16 *) &id[55<<1]));
+                d->geo.sectors = le16_to_cpu(get_unaligned((__le16 *) &id[56<<1]));
         }
         d->ssize = ssize;
         d->geo.start = 0;