Staging: hv: storvsc: Prevent outgoing traffic when stor dev is being…

… destroyed

Prevent outgoing traffic when stor dev is destroyed.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/hyperv_storage.h

@@ -294,7 +294,8 @@ static inline struct storvsc_device *get_out_stor_device(
 	struct storvsc_device *stor_device;
 
 	stor_device = (struct storvsc_device *)device->ext;
-	if (stor_device && atomic_read(&stor_device->ref_count) > 1)
+	if (stor_device && (atomic_read(&stor_device->ref_count) > 1) &&
+		!stor_device->destroy)
 		atomic_inc(&stor_device->ref_count);
 	else
 		stor_device = NULL;