V4L/DVB (9494): anysee: initialize anysee_usb_mutex statically

anysee_usb_mutex is initialized at every time the anysee device is probed.
If the second anysee device is probed while anysee_usb_mutex is locked by
the first anysee device, the mutex is broken.

This patch fixes by initialize anysee_usb_mutex statically rather
than initialize at probe time.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/dvb-usb/anysee.c b/drivers/media/dvb/dvb-usb/anysee.c
index c786359..cd2edbc 100644 (file)
--- a/drivers/media/dvb/dvb-usb/anysee.c
+++ b/drivers/media/dvb/dvb-usb/anysee.c
@@ -46,7 +46,7 @@ module_param_named(delsys, dvb_usb_anysee_delsys, int, 0644);
 MODULE_PARM_DESC(delsys, "select delivery mode (0=DVB-C, 1=DVB-T)");
 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 
-static struct mutex anysee_usb_mutex;
+static DEFINE_MUTEX(anysee_usb_mutex);
 
 static int anysee_ctrl_msg(struct dvb_usb_device *d, u8 *sbuf, u8 slen,
        u8 *rbuf, u8 rlen)
@@ -456,8 +456,6 @@ static int anysee_probe(struct usb_interface *intf,
        struct usb_host_interface *alt;
        int ret;
 
-       mutex_init(&anysee_usb_mutex);
-
        /* There is one interface with two alternate settings.
           Alternate setting 0 is for bulk transfer.
           Alternate setting 1 is for isochronous transfer.