From 68191edeb50773993f4a05651b0a085bd110fbeb Mon Sep 17 00:00:00 2001 From: Abylay Ospan Date: Sun, 14 Jun 2009 14:10:05 -0300 Subject: [PATCH] V4L/DVB (12096): Bug fix: stv0900 register read must using i2c in one transaction Signed-off-by: Abylay Ospan Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/frontends/stv0900_core.c | 40 +++++++++++----------- 1 file changed, 20 insertions(+), 20 deletions(-) diff --git a/drivers/media/dvb/frontends/stv0900_core.c b/drivers/media/dvb/frontends/stv0900_core.c index 8499bcf7f25..4daec8ad92c 100644 --- a/drivers/media/dvb/frontends/stv0900_core.c +++ b/drivers/media/dvb/frontends/stv0900_core.c @@ -149,31 +149,31 @@ void stv0900_write_reg(struct stv0900_internal *i_params, u16 reg_addr, dprintk(KERN_ERR "%s: i2c error %d\n", __func__, ret); } -u8 stv0900_read_reg(struct stv0900_internal *i_params, u16 reg_addr) +u8 stv0900_read_reg(struct stv0900_internal *i_params, u16 reg) { - u8 data[2]; int ret; - struct i2c_msg i2cmsg = { - .addr = i_params->i2c_addr, - .flags = 0, - .len = 2, - .buf = data, + u8 b0[] = { MSB(reg), LSB(reg) }; + u8 buf = 0; + struct i2c_msg msg[] = { + { + .addr = i_params->i2c_addr, + .flags = 0, + .buf = b0, + .len = 2, + }, { + .addr = i_params->i2c_addr, + .flags = I2C_M_RD, + .buf = &buf, + .len = 1, + }, }; - data[0] = MSB(reg_addr); - data[1] = LSB(reg_addr); + ret = i2c_transfer(i_params->i2c_adap, msg, 2); + if (ret != 2) + dprintk(KERN_ERR "%s: i2c error %d, reg[0x%02x]\n", + __func__, ret, reg); - ret = i2c_transfer(i_params->i2c_adap, &i2cmsg, 1); - if (ret != 1) - dprintk(KERN_ERR "%s: i2c error %d\n", __func__, ret); - - i2cmsg.flags = I2C_M_RD; - i2cmsg.len = 1; - ret = i2c_transfer(i_params->i2c_adap, &i2cmsg, 1); - if (ret != 1) - dprintk(KERN_ERR "%s: i2c error %d\n", __func__, ret); - - return data[0]; + return buf; } void extract_mask_pos(u32 label, u8 *mask, u8 *pos)