SCSI: isci: Fix a race condition in the SSP task management path
authorJeff Skirvin <jeffrey.d.skirvin@intel.com>
Fri, 12 Jul 2013 00:18:58 +0000 (17:18 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 4 Aug 2013 08:50:40 +0000 (16:50 +0800)
commitb01c4c2c2e5b7ecf14e10efabf65183d9565ff2f
tree21595aeea289c742a1895e14147836569aa4f4cc
parent7ca674af75d75aa6755746327f1fd3222e54b338
SCSI: isci: Fix a race condition in the SSP task management path

commit 96f15f29038e58e1b0a96483e2b369ff446becf1 upstream.

This commit fixes a race condition in the isci driver abort task and SSP
device task management path.  The race is caused when an I/O termination
in the SCU hardware is necessary because of an SSP target timeout condition,
and the check of the I/O end state races against the HW-termination-driven
end state.  The failure of the race meant that no TMF was sent to the device
to clean-up the pending I/O.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Reviewed-by: Lukasz Dorau <lukasz.dorau@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/scsi/isci/task.c