From: Tejun Heo Date: Mon, 6 Mar 2017 20:26:54 +0000 (-0500) Subject: libata: drop WARN from protocol error in ata_sff_qc_issue() X-Git-Tag: v4.11-rc3~30^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0580b762a4d6b70817476b90042813f8573283fa;p=platform%2Fkernel%2Flinux-exynos.git libata: drop WARN from protocol error in ata_sff_qc_issue() ata_sff_qc_issue() expects upper layers to never issue commands on a command protocol that it doesn't implement. While the assumption holds fine with the usual IO path, nothing filters based on the command protocol in the passthrough path (which was added later), allowing the warning to be tripped with a passthrough command with the right (well, wrong) protocol. Failing with AC_ERR_SYSTEM is the right thing to do anyway. Remove the unnecessary WARN. Reported-by: Dmitry Vyukov Link: http://lkml.kernel.org/r/CACT4Y+bXkvevNZU8uP6X0QVqsj6wNoUA_1exfTSOzc+SmUtMOA@mail.gmail.com Signed-off-by: Tejun Heo --- diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 2bd92dc..274d6d7 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -1482,7 +1482,6 @@ unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc) break; default: - WARN_ON_ONCE(1); return AC_ERR_SYSTEM; }