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path: root/drivers/media/dvb/b2c2/flexcop-i2c.c
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Diffstat (limited to 'drivers/media/dvb/b2c2/flexcop-i2c.c')
-rw-r--r--drivers/media/dvb/b2c2/flexcop-i2c.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/media/dvb/b2c2/flexcop-i2c.c b/drivers/media/dvb/b2c2/flexcop-i2c.c
index 02a0ea6e1c17..6bf858a436c9 100644
--- a/drivers/media/dvb/b2c2/flexcop-i2c.c
+++ b/drivers/media/dvb/b2c2/flexcop-i2c.c
@@ -135,6 +135,13 @@ static int flexcop_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs
struct flexcop_device *fc = i2c_get_adapdata(i2c_adap);
int i, ret = 0;
+ /* Some drivers use 1 byte or 0 byte reads as probes, which this
+ * driver doesn't support. These probes will always fail, so this
+ * hack makes them always succeed. If one knew how, it would of
+ * course be better to actually do the read. */
+ if (num == 1 && msgs[0].flags == I2C_M_RD && msgs[0].len <= 1)
+ return 1;
+
if (mutex_lock_interruptible(&fc->i2c_mutex))
return -ERESTARTSYS;