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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2015-05-06 18:24:21 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-10 16:03:50 +0200 |
| commit | aa519be34f45954f33a6c20430deac8e544a180f (patch) | |
| tree | d23db758bb078c7c2aee9b8c7f74c965c5c07807 /drivers/usb/storage/scsiglue.c | |
| parent | 1cb39e256410830833aaae9c5cec8b10a43cf022 (diff) | |
| download | linux-aa519be34f45954f33a6c20430deac8e544a180f.tar.gz | |
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>
Diffstat (limited to 'drivers/usb/storage/scsiglue.c')
| -rw-r--r-- | drivers/usb/storage/scsiglue.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index a8cbbffe822c89..c922d8b64362c8 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -536,7 +536,7 @@ static struct device_attribute *sysfs_device_attr_list[] = { * this defines our host template, with which we'll allocate hosts */ -struct scsi_host_template usb_stor_host_template = { +static const struct scsi_host_template usb_stor_host_template = { /* basic userland interface stuff */ .name = "usb-storage", .proc_name = "usb-storage", @@ -588,6 +588,16 @@ struct scsi_host_template usb_stor_host_template = { .module = THIS_MODULE }; +void usb_stor_host_template_init(struct scsi_host_template *sht, + const char *name, struct module *owner) +{ + *sht = usb_stor_host_template; + sht->name = name; + sht->proc_name = name; + sht->module = owner; +} +EXPORT_SYMBOL_GPL(usb_stor_host_template_init); + /* To Report "Illegal Request: Invalid Field in CDB */ unsigned char usb_stor_sense_invalidCDB[18] = { [0] = 0x70, /* current error */ |