[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>

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;