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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 /drivers/scsi/aacraid
parent1241f3593a8857fab4259b6aa9d17f26e7de3a86 (diff)
downloadop-kernel-dev-dc4adbf41385486b0c73e7382ce73f0e8b873243.zip
op-kernel-dev-dc4adbf41385486b0c73e7382ce73f0e8b873243.tar.gz
[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>
Diffstat (limited to 'drivers/scsi/aacraid')
-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 47fefca..9f75144 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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