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Commit 3a450589 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
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Staging: hv: blkvsc: Fix bugs in the module unload path 



Fix bugs in the module unload path for the blkvsc driver.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarAbhishek Kane <v-abkane@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 9d7b18d1

drivers/staging/hv/blkvsc_drv.c

+23 −17
Original line number Diff line number Diff line
@@ -518,22 +518,18 @@ static int blkvsc_remove(struct hv_device *dev) 


	blkvsc_do_operation(blkdev, DO_FLUSH);



	if (blkdev->users == 0) {

		del_gendisk(blkdev->gd);

		put_disk(blkdev->gd);

		blk_cleanup_queue(blkdev->gd->queue);



	/*

	 * Call to the vsc driver to let it know that the device is being

	 * removed

	 */

	storvsc_dev_remove(dev);



	del_gendisk(blkdev->gd);

		storvsc_dev_remove(blkdev->device_ctx);



		kmem_cache_destroy(blkdev->request_pool);



		kfree(blkdev);

	}



	return 0;



}



static void blkvsc_shutdown(struct hv_device *dev)
@@ -568,12 +564,22 @@ static int blkvsc_release(struct gendisk *disk, fmode_t mode) 
	struct block_device_context *blkdev = disk->private_data;

	unsigned long flags;



	if (blkdev->users == 1) {

	spin_lock_irqsave(&blkdev->lock, flags);



	if ((--blkdev->users == 0) && (blkdev->shutting_down)) {

		blk_stop_queue(blkdev->gd->queue);

		spin_unlock_irqrestore(&blkdev->lock, flags);



		blkvsc_do_operation(blkdev, DO_FLUSH);

	}

		del_gendisk(blkdev->gd);

		put_disk(blkdev->gd);

		blk_cleanup_queue(blkdev->gd->queue);



	spin_lock_irqsave(&blkdev->lock, flags);

	blkdev->users--;

		storvsc_dev_remove(blkdev->device_ctx);



		kmem_cache_destroy(blkdev->request_pool);

		kfree(blkdev);

	} else

		spin_unlock_irqrestore(&blkdev->lock, flags);



	return 0;