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authorBrian King <brking@linux.vnet.ibm.com>2014-10-30 17:27:10 -0500
committerChristoph Hellwig <hch@lst.de>2015-01-19 10:46:20 +0100
commit6cdb08172bc89f0a39e1643c5e7eab362692fd1b (patch)
tree455a246fb286c335b737d14d03b3f50ef629d3c7 /drivers/scsi/ipr.h
parent70a0f2c1898c6abf53670e55642b6e840b003892 (diff)
downloadlinux-6cdb08172bc89f0a39e1643c5e7eab362692fd1b.tar.bz2
ipr: wait for aborted command responses
Fixes a race condition in abort handling that was injected when multiple interrupt support was added. When only a single interrupt is present, the adapter guarantees it will send responses for aborted commands prior to the response for the abort command itself. With multiple interrupts, these responses generally come back on different interrupts, so we need to ensure the abort thread waits until the aborted command is complete so we don't perform a double completion. This race condition was being hit frequently in environments which were triggering command timeouts, which was resulting in a double completion causing a kernel oops. Cc: <stable@vger.kernel.org> Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Reviewed-by: Wendy Xiong <wenxiong@linux.vnet.ibm.com> Tested-by: Wendy Xiong <wenxiong@linux.vnet.ibm.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/ipr.h')
-rw-r--r--drivers/scsi/ipr.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h
index b4f3eec51bc9..ec03b42fa2b9 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -1606,6 +1606,7 @@ struct ipr_cmnd {
struct scsi_device *sdev;
} u;
+ struct completion *eh_comp;
struct ipr_hrr_queue *hrrq;
struct ipr_ioa_cfg *ioa_cfg;
};