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| author | Arnd Bergmann <arnd@arndb.de> | 2015-11-16 17:49:23 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2015-11-18 16:16:19 +0100 |
| commit | 757b22f9d56fb4e510782b29da752824daddf3c8 (patch) | |
| tree | 84ba677c113503b478a1a65d71ae5c75cb871ba1 /drivers/scsi/advansys.c | |
| parent | qla2xxx: Fix rwlock recursion (diff) | |
| download | linux-757b22f9d56fb4e510782b29da752824daddf3c8.tar.xz linux-757b22f9d56fb4e510782b29da752824daddf3c8.zip | |
advansys: fix big-endian builds
Building the advansys driver in a big-endian configuration such as
ARM allmodconfig shows a warning:
drivers/scsi/advansys.c: In function 'adv_build_req':
include/uapi/linux/byteorder/big_endian.h:32:26: warning: large integer implicitly truncated to unsigned type [-Woverflow]
#define __cpu_to_le32(x) ((__force __le32)__swab32((x)))
drivers/scsi/advansys.c:7806:22: note: in expansion of macro 'cpu_to_le32'
scsiqp->sense_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
It turns out that the commit that introduced this used the cpu_to_le32()
incorrectly on an 8-bit field, which results in the sense_len to always
be set to zero, as the SCSI_SENSE_BUFFERSIZE value gets moved to upper
byte of the 32-bit intermediate.
This removes the cpu_to_le32() call to restore the original version.
I found this only by looking at the compiler output and have not done a
full review for possible further endianess bugs in the same driver.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 811ddc057aac ("advansys: use DMA-API for mapping sense buffer")
Reviewed-by: Hannes Reinecke <hare@suse.de>
Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/advansys.c')
| -rw-r--r-- | drivers/scsi/advansys.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c index 4305178e4e01..1c1cd657c380 100644 --- a/drivers/scsi/advansys.c +++ b/drivers/scsi/advansys.c @@ -7803,7 +7803,7 @@ adv_build_req(struct asc_board *boardp, struct scsi_cmnd *scp, return ASC_BUSY; } scsiqp->sense_addr = cpu_to_le32(sense_addr); - scsiqp->sense_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE); + scsiqp->sense_len = SCSI_SENSE_BUFFERSIZE; /* Build ADV_SCSI_REQ_Q */ |