diff options
| author | Antti Palosaari <crope@iki.fi> | 2013-02-26 13:01:48 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-03-18 16:43:15 -0300 |
| commit | acb0549acc270c8206ecfdd35d34fc349c3457a0 (patch) | |
| tree | 64973a8cde6e41ca98411b663eed23b8aefe0512 /drivers/media | |
| parent | 972b072a83316e0d5a1fd0cb78eb99a57a305dce (diff) | |
[media] dvb_usb_v2: locked versions of USB bulk IO functions
Implement:
dvb_usbv2_generic_rw_locked()
dvb_usbv2_generic_write_locked()
Caller must hold device lock when locked versions are called.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/dvb_usb.h | 4 | ||||
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c | 38 |
2 files changed, 37 insertions, 5 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/dvb_usb.h b/drivers/media/usb/dvb-usb-v2/dvb_usb.h index 3cac8bd0b11..42801f8ecaa 100644 --- a/drivers/media/usb/dvb-usb-v2/dvb_usb.h +++ b/drivers/media/usb/dvb-usb-v2/dvb_usb.h @@ -400,5 +400,9 @@ extern int dvb_usbv2_reset_resume(struct usb_interface *); /* the generic read/write method for device control */ extern int dvb_usbv2_generic_rw(struct dvb_usb_device *, u8 *, u16, u8 *, u16); extern int dvb_usbv2_generic_write(struct dvb_usb_device *, u8 *, u16); +/* caller must hold lock when locked versions are called */ +extern int dvb_usbv2_generic_rw_locked(struct dvb_usb_device *, + u8 *, u16, u8 *, u16); +extern int dvb_usbv2_generic_write_locked(struct dvb_usb_device *, u8 *, u16); #endif diff --git a/drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c b/drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c index 5716662b483..74c911fa1fe 100644 --- a/drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c +++ b/drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c @@ -21,8 +21,8 @@ #include "dvb_usb_common.h" -int dvb_usbv2_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf, - u16 rlen) +int dvb_usb_v2_generic_io(struct dvb_usb_device *d, + u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen) { int ret, actual_length; @@ -32,8 +32,6 @@ int dvb_usbv2_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf, return -EINVAL; } - mutex_lock(&d->usb_mutex); - dev_dbg(&d->udev->dev, "%s: >>> %*ph\n", __func__, wlen, wbuf); ret = usb_bulk_msg(d->udev, usb_sndbulkpipe(d->udev, @@ -63,13 +61,43 @@ int dvb_usbv2_generic_rw(struct dvb_usb_device *d, u8 *wbuf, u16 wlen, u8 *rbuf, actual_length, rbuf); } + return ret; +} + +int dvb_usbv2_generic_rw(struct dvb_usb_device *d, + u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen) +{ + int ret; + + mutex_lock(&d->usb_mutex); + ret = dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen); mutex_unlock(&d->usb_mutex); + return ret; } EXPORT_SYMBOL(dvb_usbv2_generic_rw); int dvb_usbv2_generic_write(struct dvb_usb_device *d, u8 *buf, u16 len) { - return dvb_usbv2_generic_rw(d, buf, len, NULL, 0); + int ret; + + mutex_lock(&d->usb_mutex); + ret = dvb_usb_v2_generic_io(d, buf, len, NULL, 0); + mutex_unlock(&d->usb_mutex); + + return ret; } EXPORT_SYMBOL(dvb_usbv2_generic_write); + +int dvb_usbv2_generic_rw_locked(struct dvb_usb_device *d, + u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen) +{ + return dvb_usb_v2_generic_io(d, wbuf, wlen, rbuf, rlen); +} +EXPORT_SYMBOL(dvb_usbv2_generic_rw_locked); + +int dvb_usbv2_generic_write_locked(struct dvb_usb_device *d, u8 *buf, u16 len) +{ + return dvb_usb_v2_generic_io(d, buf, len, NULL, 0); +} +EXPORT_SYMBOL(dvb_usbv2_generic_write_locked); |