From: Gwendal Grignou <gwendal@google.com>
Date: Fri, 7 Aug 2009 23:17:49 +0000 (-0700)
Subject: libata: make ata_eh_qc_retry() bump scmd->allowed on bogus failures
X-Git-Tag: v3.12-rc7~28^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f13e220161e738c2710b9904dcb3cf8bb0bcce61;p=pandora-kernel.git

libata: make ata_eh_qc_retry() bump scmd->allowed on bogus failures

libata EH decrements scmd->retries when the command failed for reasons
unrelated to the command itself so that, for example, commands aborted
due to suspend / resume cycle don't get penalized; however,
decrementing scmd->retries isn't enough for ATA passthrough commands.

Without this fix, ATA passthrough commands are not resend to the
drive, and no error is signalled to the caller because:

- allowed retry count is 1
- ata_eh_qc_complete fill the sense data, so result is valid
- sense data is filled with untouched ATA registers.

Signed-off-by: Gwendal Grignou <gwendal@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
---

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