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authorMark Haverkamp <markh@osdl.org>2006-03-27 12:44:26 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-04-13 11:13:20 -0400
commitdc4adbf41385486b0c73e7382ce73f0e8b873243 (patch)
tree8275237e742bd3f7b749172128977772c4fa097d /drivers/scsi
parent1241f3593a8857fab4259b6aa9d17f26e7de3a86 (diff)
[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')
-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 @@
38#include <linux/completion.h> 38#include <linux/completion.h>
39#include <linux/dma-mapping.h> 39#include <linux/dma-mapping.h>
40#include <linux/blkdev.h> 40#include <linux/blkdev.h>
41#include <linux/delay.h>
42#include <linux/kthread.h>
41#include <asm/semaphore.h> 43#include <asm/semaphore.h>
42#include <asm/uaccess.h> 44#include <asm/uaccess.h>
43 45
@@ -293,6 +295,16 @@ return_fib:
293 status = 0; 295 status = 0;
294 } else { 296 } else {
295 spin_unlock_irqrestore(&dev->fib_lock, flags); 297 spin_unlock_irqrestore(&dev->fib_lock, flags);
298 /* If someone killed the AIF aacraid thread, restart it */
299 status = !dev->aif_thread;
300 if (status && dev->queues && dev->fsa_dev) {
301 /* Be paranoid, be very paranoid! */
302 kthread_stop(dev->thread);
303 ssleep(1);
304 dev->aif_thread = 0;
305 dev->thread = kthread_run(aac_command_thread, dev, dev->name);
306 ssleep(1);
307 }
296 if (f.wait) { 308 if (f.wait) {
297 if(down_interruptible(&fibctx->wait_sem) < 0) { 309 if(down_interruptible(&fibctx->wait_sem) < 0) {
298 status = -EINTR; 310 status = -EINTR;