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| author | Tejun Heo <htejun@gmail.com> | 2006-11-16 01:19:31 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-11-16 11:43:38 -0800 |
| commit | 097b8457dafe7efc22201b4062e2d1e82e494067 (patch) | |
| tree | c59484ba7965d4e18bff2e6492d296382cbf86ac /block/scsi_ioctl.c | |
| parent | ae56fb16337c882c52806508f93ead4034004c7a (diff) | |
| download | linux-097b8457dafe7efc22201b4062e2d1e82e494067.tar.gz linux-097b8457dafe7efc22201b4062e2d1e82e494067.tar.bz2 linux-097b8457dafe7efc22201b4062e2d1e82e494067.zip | |
[PATCH] scsi: clear garbage after CDBs on SG_IO
ATAPI devices transfer fixed number of bytes for CDBs (12 or 16). Some
ATAPI devices choke when shorter CDB is used and the left bytes contain
garbage. Block SG_IO cleared left bytes but SCSI SG_IO didn't. This patch
makes SCSI SG_IO clear it and simplify CDB clearing in block SG_IO.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Mathieu Fluhr <mfluhr@nero.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Douglas Gilbert <dougg@torque.net>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Cc: <stable@kernel.org>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'block/scsi_ioctl.c')
| -rw-r--r-- | block/scsi_ioctl.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index a19338e6215d..e55a75621437 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -286,9 +286,8 @@ static int sg_io(struct file *file, request_queue_t *q, * fill in request structure */ rq->cmd_len = hdr->cmd_len; + memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */ memcpy(rq->cmd, cmd, hdr->cmd_len); - if (sizeof(rq->cmd) != hdr->cmd_len) - memset(rq->cmd + hdr->cmd_len, 0, sizeof(rq->cmd) - hdr->cmd_len); memset(sense, 0, sizeof(sense)); rq->sense = sense; |