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[AUTOSEL,for,4.14,060/161] scsi: fas216: fix sense buffer initialization

Message ID 20180409001936.162706-60-alexander.levin@microsoft.com
State New
Headers show
Series None | expand

Commit Message

Sasha Levin April 9, 2018, 12:20 a.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>


[ Upstream commit 96d5eaa9bb74d299508d811d865c2c41b38b0301 ]

While testing with the ARM specific memset() macro removed, I ran into a
compiler warning that shows an old bug:

drivers/scsi/arm/fas216.c: In function 'fas216_rq_sns_done':
drivers/scsi/arm/fas216.c:2014:40: error: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to provide an explicit length? [-Werror=sizeof-pointer-memaccess]

It turns out that the definition of the scsi_cmd structure changed back
in linux-2.6.25, so now we clear only four bytes (sizeof(pointer))
instead of 96 (SCSI_SENSE_BUFFERSIZE). I did not check whether we
actually need to initialize the buffer here, but it's clear that if we
do it, we should use the correct size.

Fixes: de25deb18016 ("[SCSI] use dynamically allocated sense buffer")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>

---
 drivers/scsi/arm/fas216.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.15.1
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Patch

diff --git a/drivers/scsi/arm/fas216.c b/drivers/scsi/arm/fas216.c
index 24388795ee9a..936e8c735656 100644
--- a/drivers/scsi/arm/fas216.c
+++ b/drivers/scsi/arm/fas216.c
@@ -2011,7 +2011,7 @@  static void fas216_rq_sns_done(FAS216_Info *info, struct scsi_cmnd *SCpnt,
 		 * have valid data in the sense buffer that could
 		 * confuse the higher levels.
 		 */
-		memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
+		memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 //printk("scsi%d.%c: sense buffer: ", info->host->host_no, '0' + SCpnt->device->id);
 //{ int i; for (i = 0; i < 32; i++) printk("%02x ", SCpnt->sense_buffer[i]); printk("\n"); }
 	/*