Received from Mark Salyzyn
Since the helper thread for the driver can be killed unceremoniously by
an application, we detect the loss of the helper and restart it.
Signed-off-by: Mark Haverkamp <markh@xxxxxxxx>
---
Applies to the scsi-misc-2.6 git tree.
--- scsi-misc-aac.orig/drivers/scsi/aacraid/commctrl.c 2006-03-22 12:44:52.000000000 -0800
+++ scsi-misc-aac/drivers/scsi/aacraid/commctrl.c 2006-03-22 12:47:35.000000000 -0800
@@ -38,6 +38,8 @@
#include <linux/completion.h>
#include <linux/dma-mapping.h>
#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
#include <asm/semaphore.h>
#include <asm/uaccess.h>
@@ -293,6 +295,16 @@
status = 0;
} else {
spin_unlock_irqrestore(&dev->fib_lock, flags);
+ /* If someone killed the AIF aacraid thread, restart it */
+ status = !dev->aif_thread;
+ if (status && dev->queues && dev->fsa_dev) {
+ /* Be paranoid, be very paranoid! */
+ kthread_stop(dev->thread);
+ ssleep(1);
+ dev->aif_thread = 0;
+ dev->thread = kthread_run(aac_command_thread, dev, dev->name);
+ ssleep(1);
+ }
if (f.wait) {
if(down_interruptible(&fibctx->wait_sem) < 0) {
status = -EINTR;
--
Mark Haverkamp <markh@xxxxxxxx>
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