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authorMark Lord <kernel@teksavvy.com>2010-08-20 10:13:16 -0400
committerJeff Garzik <jgarzik@redhat.com>2010-08-25 19:24:16 -0400
commit55ee67f837882f28a900705a2ca1af257ab6c53d (patch)
tree91393e3155968c1654bfdf89fdbe404afd736554 /drivers/ata/libata-sff.c
parent44b733809a5aba7f6b15a548d31a56d25bf3851c (diff)
libata-sff: remove harmful BUG_ON from ata_bmdma_qc_issue
Remove harmful BUG_ON() from ata_bmdma_qc_issue(), as it casts too wide of a net and breaks sata_mv. It also crashes the kernel while doing the BUG_ON(). There's already a WARN_ON_ONCE() further down to catch the case of POLLING for a BMDMA operation. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Cc: stable@kernel.org
Diffstat (limited to 'drivers/ata/libata-sff.c')
-rw-r--r--drivers/ata/libata-sff.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 674c1436491f..3b82d8ef76f0 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -2735,10 +2735,6 @@ unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc)
2735{ 2735{
2736 struct ata_port *ap = qc->ap; 2736 struct ata_port *ap = qc->ap;
2737 2737
2738 /* see ata_dma_blacklisted() */
2739 BUG_ON((ap->flags & ATA_FLAG_PIO_POLLING) &&
2740 qc->tf.protocol == ATAPI_PROT_DMA);
2741
2742 /* defer PIO handling to sff_qc_issue */ 2738 /* defer PIO handling to sff_qc_issue */
2743 if (!ata_is_dma(qc->tf.protocol)) 2739 if (!ata_is_dma(qc->tf.protocol))
2744 return ata_sff_qc_issue(qc); 2740 return ata_sff_qc_issue(qc);