V4L/DVB (4864): TDA826x I2C read with 2 messages

Added a dump I2C message to the TDA826x-driver to fix I2C read for
identification with ttusb2-driver.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/media/dvb/frontends/tda826x.c b/drivers/media/dvb/frontends/tda826x.c
index 4f01d7b47cd5..79f971dc52b6 100644
--- a/drivers/media/dvb/frontends/tda826x.c
+++ b/drivers/media/dvb/frontends/tda826x.c
@@ -132,18 +132,21 @@ struct dvb_frontend *tda826x_attach(struct dvb_frontend *fe, int addr, struct i2
 {
         struct tda826x_priv *priv = NULL;
         u8 b1 [] = { 0, 0 };
-        struct i2c_msg msg = { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 };
+        struct i2c_msg msg[2] = {
+                { .addr = addr, .flags = 0,        .buf = NULL, .len = 0 },
+                { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 }
+        };
         int ret;
 
         dprintk("%s:\n", __FUNCTION__);
 
         if (fe->ops.i2c_gate_ctrl)
                 fe->ops.i2c_gate_ctrl(fe, 1);
-        ret = i2c_transfer (i2c, &msg, 1);
+        ret = i2c_transfer (i2c, msg, 2);
         if (fe->ops.i2c_gate_ctrl)
                 fe->ops.i2c_gate_ctrl(fe, 0);
 
-        if (ret != 1)
+        if (ret != 2)
                 return NULL;
         if (!(b1[1] & 0x80))
                 return NULL;