From: Tejun Heo <htejun@gmail.com>
Date: Fri, 10 Feb 2006 06:10:48 +0000 (+0900)
Subject: [PATCH] libata: implement ata_scsi_timed_out()
X-Git-Tag: v2.6.17-rc1~1182^2~88
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f29841e08fa20a7f2c8bc1b70306975299c66ee7;p=pandora-kernel.git

[PATCH] libata: implement ata_scsi_timed_out()

Implement ata_scsi_timed_out(), to be used as
scsi_host_template->eh_timed_out callback for all libata drivers.
Without this function, the following race exists.

If a qc completes after SCSI timer expires but before libata EH kicks
in, the qc gets completed but the scsicmd still gets passed to libata
EH resulting in ->eng_timeout invocation with NULL qc, which none is
handling properly.

This patch makes sure that scmd and qc share the same lifetime.
Original idea from Jeff Garzik <jgarzik@pobox.com>.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
---

Reading git-diff-tree failed