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| author |   Tejun Heo <htejun@gmail.com> | 2006-02-20 23:48:37 +0900 |
|---|---|---|
| committer |   Jeff Garzik <jgarzik@pobox.com> | 2006-02-20 16:48:17 -0500 |
| commit | 9ae61c6cb69f5251d160576c324948805f97e901 (patch) | |
| tree | 14ab65b577a916c777823468889fc593d6838b12 /drivers/scsi/sata_qstor.c | |
| parent | Linux v2.6.16-rc4 (diff) | |
| download | linux-dev-9ae61c6cb69f5251d160576c324948805f97e901.tar.xz linux-dev-9ae61c6cb69f5251d160576c324948805f97e901.zip | |
[PATCH] libata: fix WARN_ON() condition in *_fill_sg()
For ATAPI commands, padding can reduce qc->n_elem by one and thus to
zero making assert(qc->n_elem > 0)'s in ata_fill_sg() and qs_fill_sg()
fail for legal commands. This patch fixes the assert()'s to take
qc->pad_len into account.
Although the condition check seems a bit excessive, as this part of
code isn't still stable yet, I think it's worth to keep those.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/scsi/sata_qstor.c')
| -rw-r--r-- | drivers/scsi/sata_qstor.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/sata_qstor.c b/drivers/scsi/sata_qstor.c index de05e2883f9c..80480f0fb2b8 100644 --- a/drivers/scsi/sata_qstor.c +++ b/drivers/scsi/sata_qstor.c @@ -277,7 +277,7 @@ static unsigned int qs_fill_sg(struct ata_queued_cmd *qc) u8 *prd = pp->pkt + QS_CPB_BYTES; assert(qc->__sg != NULL); - assert(qc->n_elem > 0); + assert(qc->n_elem > 0 || qc->pad_len > 0); nelem = 0; ata_for_each_sg(sg, qc) { |