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Commit dc4adbf4 authored by Mark Haverkamp's avatar Mark Haverkamp Committed by James Bottomley
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[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: default avatarMark Haverkamp <markh@osdl.org>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent 1241f359

drivers/scsi/aacraid/commctrl.c

+12 −0
Original line number Diff line number Diff line
@@ -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 @@ static int next_getadapter_fib(struct aac_dev * dev, void __user *arg) 
		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;