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authorAntti Palosaari <crope@iki.fi>2012-05-18 16:02:55 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-05-20 10:24:53 -0300
commitc188637dc5a25aec6a21279524405c8fe96f2f4b (patch)
tree2097a31d4598283633185b8b4b4857fca4254894 /drivers/media
parent631a2b611288f87de4ef1098d1fb4bc4d246b103 (diff)
downloadlinux-c188637dc5a25aec6a21279524405c8fe96f2f4b.tar.bz2
[media] rtl2830: prevent hw access when sleeping
to prevent I/O errors... 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/dvb/frontends/rtl2830.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/rtl2830.c b/drivers/media/dvb/frontends/rtl2830.c
index 507ef4bb047a..93612ebac519 100644
--- a/drivers/media/dvb/frontends/rtl2830.c
+++ b/drivers/media/dvb/frontends/rtl2830.c
@@ -381,6 +381,9 @@ static int rtl2830_get_frontend(struct dvb_frontend *fe)
int ret;
u8 buf[3];
+ if (priv->sleeping)
+ return 0;
+
ret = rtl2830_rd_regs(priv, 0x33c, buf, 2);
if (ret)
goto err;
@@ -525,6 +528,9 @@ static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr)
{ 92888734, 92888734, 95487525, 99770748 },
};
+ if (priv->sleeping)
+ return 0;
+
/* reports SNR in resolution of 0.1 dB */
ret = rtl2830_rd_reg(priv, 0x33c, &tmp);
@@ -563,6 +569,9 @@ static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber)
int ret;
u8 buf[2];
+ if (priv->sleeping)
+ return 0;
+
ret = rtl2830_rd_regs(priv, 0x34e, buf, 2);
if (ret)
goto err;
@@ -588,6 +597,9 @@ static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
u8 buf[2];
u16 if_agc_raw, if_agc;
+ if (priv->sleeping)
+ return 0;
+
ret = rtl2830_rd_regs(priv, 0x359, buf, 2);
if (ret)
goto err;