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authorAntti Palosaari <crope@iki.fi>2012-09-01 09:54:43 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-09-18 12:22:01 -0300
commit8b03663644002a6c742dd38dbdc8300da85293da (patch)
treed32fbfb44723ae28349367b033fa61d2fe326624 /drivers/media/usb/dvb-usb-v2/rtl28xxu.c
parentc392e9e13e398c3ebf37e60942c2ddadbe823880 (diff)
downloadvexpress-lsk-8b03663644002a6c742dd38dbdc8300da85293da.tar.gz
[media] rtl28xxu: correct usb_clear_halt() usage
It is not allowed to call usb_clear_halt() after urbs are submitted. That causes oops sometimes. Move whole streaming_ctrl() logic to power_ctrl() in order to avoid wrong usb_clear_halt() use. Also, configuring streaming endpoint in streaming_ctrl() sounds like a little bit wrong as it is aimed for control stream gate. Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net> Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/usb/dvb-usb-v2/rtl28xxu.c')
-rw-r--r--drivers/media/usb/dvb-usb-v2/rtl28xxu.c55
1 files changed, 25 insertions, 30 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index e29fca2ba12..7d11c5dede7 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -825,37 +825,10 @@ err:
return ret;
}
-static int rtl28xxu_streaming_ctrl(struct dvb_frontend *fe , int onoff)
-{
- int ret;
- u8 buf[2];
- struct dvb_usb_device *d = fe_to_d(fe);
-
- dev_dbg(&d->udev->dev, "%s: onoff=%d\n", __func__, onoff);
-
- if (onoff) {
- buf[0] = 0x00;
- buf[1] = 0x00;
- usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, 0x81));
- } else {
- buf[0] = 0x10; /* stall EPA */
- buf[1] = 0x02; /* reset EPA */
- }
-
- ret = rtl28xx_wr_regs(d, USB_EPA_CTL, buf, 2);
- if (ret)
- goto err;
-
- return ret;
-err:
- dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
- return ret;
-}
-
static int rtl2831u_power_ctrl(struct dvb_usb_device *d, int onoff)
{
int ret;
- u8 gpio, sys0;
+ u8 gpio, sys0, epa_ctl[2];
dev_dbg(&d->udev->dev, "%s: onoff=%d\n", __func__, onoff);
@@ -878,11 +851,15 @@ static int rtl2831u_power_ctrl(struct dvb_usb_device *d, int onoff)
gpio |= 0x04; /* GPIO2 = 1, LED on */
sys0 = sys0 & 0x0f;
sys0 |= 0xe0;
+ epa_ctl[0] = 0x00; /* clear stall */
+ epa_ctl[1] = 0x00; /* clear reset */
} else {
gpio &= (~0x01); /* GPIO0 = 0 */
gpio |= 0x10; /* GPIO4 = 1 */
gpio &= (~0x04); /* GPIO2 = 1, LED off */
sys0 = sys0 & (~0xc0);
+ epa_ctl[0] = 0x10; /* set stall */
+ epa_ctl[1] = 0x02; /* set reset */
}
dev_dbg(&d->udev->dev, "%s: WR SYS0=%02x GPIO_OUT_VAL=%02x\n", __func__,
@@ -898,6 +875,14 @@ static int rtl2831u_power_ctrl(struct dvb_usb_device *d, int onoff)
if (ret)
goto err;
+ /* streaming EP: stall & reset */
+ ret = rtl28xx_wr_regs(d, USB_EPA_CTL, epa_ctl, 2);
+ if (ret)
+ goto err;
+
+ if (onoff)
+ usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, 0x81));
+
return ret;
err:
dev_dbg(&d->udev->dev, "%s: failed=%d\n", __func__, ret);
@@ -972,6 +957,14 @@ static int rtl2832u_power_ctrl(struct dvb_usb_device *d, int onoff)
goto err;
+ /* streaming EP: clear stall & reset */
+ ret = rtl28xx_wr_regs(d, USB_EPA_CTL, "\x00\x00", 2);
+ if (ret)
+ goto err;
+
+ ret = usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, 0x81));
+ if (ret)
+ goto err;
} else {
/* demod_ctl_1 */
ret = rtl28xx_rd_reg(d, SYS_DEMOD_CTL1, &val);
@@ -1006,6 +999,10 @@ static int rtl2832u_power_ctrl(struct dvb_usb_device *d, int onoff)
if (ret)
goto err;
+ /* streaming EP: set stall & reset */
+ ret = rtl28xx_wr_regs(d, USB_EPA_CTL, "\x10\x02", 2);
+ if (ret)
+ goto err;
}
return ret;
@@ -1182,7 +1179,6 @@ static const struct dvb_usb_device_properties rtl2831u_props = {
.tuner_attach = rtl2831u_tuner_attach,
.init = rtl28xxu_init,
.get_rc_config = rtl2831u_get_rc_config,
- .streaming_ctrl = rtl28xxu_streaming_ctrl,
.num_adapters = 1,
.adapter = {
@@ -1204,7 +1200,6 @@ static const struct dvb_usb_device_properties rtl2832u_props = {
.tuner_attach = rtl2832u_tuner_attach,
.init = rtl28xxu_init,
.get_rc_config = rtl2832u_get_rc_config,
- .streaming_ctrl = rtl28xxu_streaming_ctrl,
.num_adapters = 1,
.adapter = {