From f4b31db92d163df8a639f5a8c8633bdeb6e8432d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 16 Oct 2009 13:00:51 +0900 Subject: [PATCH] libata: fix internal command failure handling When an internal command fails, it should be failed directly without invoking EH. In the original implemetation, this was accomplished by letting internal command bypass failure handling in ata_qc_complete(). However, later changes added post-successful-completion handling to that code path and the success path is no longer adequate as internal command failure path. One of the visible problems is that internal command failure due to timeout or other freeze conditions would spuriously trigger WARN_ON_ONCE() in the success path. This patch updates failure path such that internal command failure handling is contained there. Signed-off-by: Tejun Heo Cc: stable@kernel.org Signed-off-by: Jeff Garzik --- drivers/ata/libata-core.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index b525a098134..d7f0f1b1ae3 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5028,12 +5028,14 @@ void ata_qc_complete(struct ata_queued_cmd *qc) qc->flags |= ATA_QCFLAG_FAILED; if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { - if (!ata_tag_internal(qc->tag)) { - /* always fill result TF for failed qc */ - fill_result_tf(qc); + /* always fill result TF for failed qc */ + fill_result_tf(qc); + + if (!ata_tag_internal(qc->tag)) ata_qc_schedule_eh(qc); - return; - } + else + __ata_qc_complete(qc); + return; } WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);