scsi: vmw_pvscsi: return SUCCESS for successful command aborts

The vmw_pvscsi driver reports most successful aborts as FAILED to the
scsi error handler.  This is do to a misunderstanding of how
completion_done() works and its interaction with a successful wait using
wait_for_completion_timeout().  The vmw_pvscsi driver is expecting
completion_done() to always return true if complete() has been called on
the completion structure.  But completion_done() returns true after
complete() has been called only if no function like
wait_for_completion_timeout() has seen the completion and cleared it as
part of successfully waiting for the completion.

Instead of using completion_done(), vmw_pvscsi should just use the
return value from wait_for_completion_timeout() to know if the wait
timed out or not.

[mkp: bumped driver version per request]

Signed-off-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Acked-by: Jim Gill <jgill@vmware.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/vmw_pvscsi.c b/drivers/scsi/vmw_pvscsi.c
index 4a0d3cd..15ca09c 100644 (file)
--- a/drivers/scsi/vmw_pvscsi.c
+++ b/drivers/scsi/vmw_pvscsi.c
@@ -793,6 +793,7 @@ static int pvscsi_abort(struct scsi_cmnd *cmd)
        unsigned long flags;
        int result = SUCCESS;
        DECLARE_COMPLETION_ONSTACK(abort_cmp);
+       int done;
 
        scmd_printk(KERN_DEBUG, cmd, "task abort on host %u, %p\n",
                    adapter->host->host_no, cmd);
@@ -824,10 +825,10 @@ static int pvscsi_abort(struct scsi_cmnd *cmd)
        pvscsi_abort_cmd(adapter, ctx);
        spin_unlock_irqrestore(&adapter->hw_lock, flags);
        /* Wait for 2 secs for the completion. */
-       wait_for_completion_timeout(&abort_cmp, msecs_to_jiffies(2000));
+       done = wait_for_completion_timeout(&abort_cmp, msecs_to_jiffies(2000));
        spin_lock_irqsave(&adapter->hw_lock, flags);
 
-       if (!completion_done(&abort_cmp)) {
+       if (!done) {
                /*
                 * Failed to abort the command, unmark the fact that it
                 * was requested to be aborted.

diff --git a/drivers/scsi/vmw_pvscsi.h b/drivers/scsi/vmw_pvscsi.h
index c097d2c..d41292e 100644 (file)
--- a/drivers/scsi/vmw_pvscsi.h
+++ b/drivers/scsi/vmw_pvscsi.h
@@ -26,7 +26,7 @@
 
 #include <linux/types.h>
 
-#define PVSCSI_DRIVER_VERSION_STRING   "1.0.6.0-k"
+#define PVSCSI_DRIVER_VERSION_STRING   "1.0.7.0-k"
 
 #define PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT 128