Messages in this thread Patch in this message | | | Subject | [PATCH 2.6.14-rc2] aoe [2/3]: use get_unaligned for accesses in ATA id buffer | From | "Ed L. Cashin" <> | Date | Thu, 29 Sep 2005 12:47:40 -0400 |
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Signed-off-by: "Ed L. Cashin" <ecashin@coraid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Use get_unaligned for possibly-unaligned multi-byte accesses to the ATA device identify response buffer.
Index: 2.6.14-rc2-aoe/drivers/block/aoe/aoecmd.c =================================================================== --- 2.6.14-rc2-aoe.orig/drivers/block/aoe/aoecmd.c 2005-09-29 12:01:56.000000000 -0400 +++ 2.6.14-rc2-aoe/drivers/block/aoe/aoecmd.c 2005-09-29 12:01:56.000000000 -0400 @@ -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) @@ -315,16 +316,16 @@ 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; @@ -335,12 +336,12 @@ 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;
-- Ed L. Cashin <ecashin@coraid.com>
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