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usb: storage: fix module reference for scsi host

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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>
This commit is contained in:
Akinobu Mita
2015-05-06 18:24:21 +09:00
committed by Greg Kroah-Hartman
parent 1cb39e2564
commit aa519be34f
17 changed files with 150 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/usb/storage/datafab.c
View File

@@ -59,6 +59,9 @@
#include "transport.h"
#include "protocol.h"
#include "debug.h"
#include "scsiglue.h"
#define DRV_NAME "ums-datafab"
MODULE_DESCRIPTION("Driver for Datafab USB Compact Flash reader");
MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>");
@@ -721,6 +724,8 @@ static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us)
return USB_STOR_TRANSPORT_FAILED;
}
static struct scsi_host_template datafab_host_template;
static int datafab_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
@@ -728,7 +733,8 @@ static int datafab_probe(struct usb_interface *intf,
int result;
result = usb_stor_probe1(&us, intf, id,
(id - datafab_usb_ids) + datafab_unusual_dev_list);
(id - datafab_usb_ids) + datafab_unusual_dev_list,
&datafab_host_template);
if (result)
return result;
@@ -742,7 +748,7 @@ static int datafab_probe(struct usb_interface *intf,
}
static struct usb_driver datafab_driver = {
.name = "ums-datafab",
.name = DRV_NAME,
.probe = datafab_probe,
.disconnect = usb_stor_disconnect,
.suspend = usb_stor_suspend,
@@ -755,4 +761,4 @@ static struct usb_driver datafab_driver = {
.no_dynamic_id = 1,
};
module_usb_driver(datafab_driver);
module_usb_stor_driver(datafab_driver, datafab_host_template, DRV_NAME);