Commit 757b22f9 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Martin K. Petersen

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: 's avatarArnd Bergmann <arnd@arndb.de>
Fixes: 811ddc05 ("advansys: use DMA-API for mapping sense buffer")
Reviewed-by: 's avatarHannes Reinecke <hare@suse.de>
Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: 's avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 0874f8ec
......@@ -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 */
......
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