[SCSI] aacraid: Better handling of in-flight events on thread stop
When an error occured that would shut down the driver, some in-flight
events were getting caught up, deadlocking a CPU or two.
Signed-off-by: Ben Collins <bcollins@ubuntu.com>
Acked-by: Achim Leubner <Achim_Leubner@pmc-sierra.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index fdfc4be..2be612b 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -1089,8 +1089,17 @@
static void __aac_shutdown(struct aac_dev * aac)
{
- if (aac->aif_thread)
+ if (aac->aif_thread) {
+ int i;
+ /* Clear out events first */
+ for (i = 0; i < (aac->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB); i++) {
+ struct fib *fib = &aac->fibs[i];
+ if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
+ (fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected)))
+ up(&fib->event_wait);
+ }
kthread_stop(aac->thread);
+ }
aac_send_shutdown(aac);
aac_adapter_disable_int(aac);
free_irq(aac->pdev->irq, aac);
@@ -1191,6 +1200,7 @@
if (IS_ERR(aac->thread)) {
printk(KERN_ERR "aacraid: Unable to create command thread.\n");
error = PTR_ERR(aac->thread);
+ aac->thread = NULL;
goto out_deinit;
}