usb: storage: fix module reference for scsi host
While accessing a unusual usb storage (ums-alauda, ums-cypress, ...),
the module reference count is not incremented. Because these drivers
allocate scsi hosts with usb_stor_host_template defined in usb-storage
module. So these drivers always can be unloaded.
This fixes it by preparing scsi host template which is initialized
at module_init() for each ums-* driver. In order to minimize the
difference in ums-* drivers, introduce module_usb_stor_driver() helper
macro which is same as module_usb_driver() except that it also
initializes scsi host template.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Vinayak Holikatti <vinholikatti@gmail.com>
Cc: Dolev Raviv <draviv@codeaurora.org>
Cc: Sujit Reddy Thumma <sthumma@codeaurora.org>
Cc: Subhash Jadavani <subhashj@codeaurora.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Hannes Reinecke <hare@suse.de>
Cc: linux-usb@vger.kernel.org
Cc: usb-storage@lists.one-eyed-alien.net
Cc: linux-scsi@vger.kernel.org
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/storage/onetouch.c b/drivers/usb/storage/onetouch.c
index 74e2aa2..acc3d03 100644
--- a/drivers/usb/storage/onetouch.c
+++ b/drivers/usb/storage/onetouch.c
@@ -35,6 +35,9 @@
#include <linux/usb/input.h>
#include "usb.h"
#include "debug.h"
+#include "scsiglue.h"
+
+#define DRV_NAME "ums-onetouch"
MODULE_DESCRIPTION("Maxtor USB OneTouch hard drive button driver");
MODULE_AUTHOR("Nick Sillik <n.sillik@temple.edu>");
@@ -283,6 +286,8 @@
}
}
+static struct scsi_host_template onetouch_host_template;
+
static int onetouch_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
@@ -290,7 +295,8 @@
int result;
result = usb_stor_probe1(&us, intf, id,
- (id - onetouch_usb_ids) + onetouch_unusual_dev_list);
+ (id - onetouch_usb_ids) + onetouch_unusual_dev_list,
+ &onetouch_host_template);
if (result)
return result;
@@ -301,7 +307,7 @@
}
static struct usb_driver onetouch_driver = {
- .name = "ums-onetouch",
+ .name = DRV_NAME,
.probe = onetouch_probe,
.disconnect = usb_stor_disconnect,
.suspend = usb_stor_suspend,
@@ -314,4 +320,4 @@
.no_dynamic_id = 1,
};
-module_usb_driver(onetouch_driver);
+module_usb_stor_driver(onetouch_driver, onetouch_host_template, DRV_NAME);