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authorMark Haverkamp <markh@osdl.org>2006-03-27 09:44:26 -0800
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-04-13 10:13:20 -0500
commitdc4adbf41385486b0c73e7382ce73f0e8b873243 (patch)
tree8275237e742bd3f7b749172128977772c4fa097d
parent1241f3593a8857fab4259b6aa9d17f26e7de3a86 (diff)
downloadblackbird-op-linux-dc4adbf41385486b0c73e7382ce73f0e8b873243.tar.gz
blackbird-op-linux-dc4adbf41385486b0c73e7382ce73f0e8b873243.zip
[SCSI] aacraid: Re-start helper thread if it dies
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@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
-rw-r--r--drivers/scsi/aacraid/commctrl.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index 47fefca72695..9f75144e5247 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -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 @@ return_fib:
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;
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