[SCSI] mpt fusion: clear list of outstanding commands on host reset

A bug in the fusion driver was exposed by the switch to block timeout.
Basically, drivers are supposed to terminate commands once error
handling begins on them.  The fusion apparently wasn't doing this.
Under the old timeout regime, completions on terminated commands would
by and large get ignored because of the way command timeouts used to
work. The new block timers are very intolerant to this, though,
becuase the request gets cleaned and freed.

Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=12195

Reported-by: Alex Shi <alex.shi@intel.com>
Tested-by: Ming Lin <ming.m.lin@intel.com>
Cc: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c
index d62fd4f6b52e054db684e2af1e30ac12fa3a9240..ee090413e598e4254cad01d211e465e46e081f48 100644 (file)
--- a/drivers/message/fusion/mptscsih.c
+++ b/drivers/message/fusion/mptscsih.c
@@ -2008,6 +2008,9 @@ mptscsih_host_reset(struct scsi_cmnd *SCpnt)
                return FAILED;
        }
 
+       /* make sure we have no outstanding commands at this stage */
+       mptscsih_flush_running_cmds(hd);
+
        ioc = hd->ioc;
        printk(MYIOC_s_INFO_FMT "attempting host reset! (sc=%p)\n",
            ioc->name, SCpnt);