[PATCH] ibmvfc: fix misdefined reserved field in ibmvfc_fcp_rsp_info

[PATCH] ibmvfc: fix misdefined reserved field in ibmvfc_fcp_rsp_info

[Tyrel Datwyler]

The fcp_rsp_info structure as defined in the FC spec has an initial 3 bytes
reserved field. The ibmvfc driver mistakenly defined this field as 4 bytes
resulting in the rsp_code field being defined in what should be the start of
the second reserved field and thus always being reported as zero by the
driver.

Ideally, we should wire ibmvfc up with libfc for the sake of code
deduplication, and ease of maintaining standardized structures in a single
place. However, for now simply fixup the definition in ibmvfc for
backporting to distros on older kernels. Wiring up with libfc will be done
in a followup patch.

Cc: stable@vger.kernel.org
Reported-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvfc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
index 9a0696f..b81a53c 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.h
+++ b/drivers/scsi/ibmvscsi/ibmvfc.h
@@ -367,7 +367,7 @@ enum ibmvfc_fcp_rsp_info_codes {
 };
 
 struct ibmvfc_fcp_rsp_info {
-	__be16 reserved;
+	u8 reserved[3];
 	u8 rsp_code;
 	u8 reserved2[4];
 }__attribute__((packed, aligned (2)));
-- 
2.7.4

Re: [PATCH] ibmvfc: fix misdefined reserved field in ibmvfc_fcp_rsp_info

[Martin K. Petersen]

Tyrel,

> The fcp_rsp_info structure as defined in the FC spec has an initial 3 bytes
> reserved field. The ibmvfc driver mistakenly defined this field as 4 bytes
> resulting in the rsp_code field being defined in what should be the start of
> the second reserved field and thus always being reported as zero by the
> driver.

Applied to 4.16/scsi-fixes, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering