On 09/28/2012 03:59 PM, Rémi Cardona wrote:
- if kmalloc() returns NULL, we can return immediately without trying
to kfree() a NULL pointer.
- if i2c_transfer() fails, error out immediately instead of trying to
upload the remaining bytes of the firmware.
- the error code is then properly propagated down to ds3000_initfe().
Signed-off-by: Rémi Cardona <remi.cardona@xxxxxxxxxxxx>
Reviewed-by: Antti Palosaari <crope@xxxxxx>
---
drivers/media/dvb-frontends/ds3000.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/media/dvb-frontends/ds3000.c b/drivers/media/dvb-frontends/ds3000.c
index 6752222..162faaf 100644
--- a/drivers/media/dvb-frontends/ds3000.c
+++ b/drivers/media/dvb-frontends/ds3000.c
@@ -280,15 +280,14 @@ static int ds3000_tuner_writereg(struct ds3000_state *state, int reg, int data)
static int ds3000_writeFW(struct ds3000_state *state, int reg,
const u8 *data, u16 len)
{
- int i, ret = -EREMOTEIO;
+ int i, ret = 0;
struct i2c_msg msg;
u8 *buf;
buf = kmalloc(33, GFP_KERNEL);
if (buf == NULL) {
printk(KERN_ERR "Unable to kmalloc\n");
- ret = -ENOMEM;
- goto error;
+ return -ENOMEM;
}
*(buf) = reg;
@@ -308,8 +307,10 @@ static int ds3000_writeFW(struct ds3000_state *state, int reg,
printk(KERN_ERR "%s: write error(err == %i, "
"reg == 0x%02x\n", __func__, ret, reg);
ret = -EREMOTEIO;
+ goto error;
}
}
+ ret = 0;
error:
kfree(buf);
@@ -426,6 +427,7 @@ static int ds3000_load_firmware(struct dvb_frontend *fe,
const struct firmware *fw)
{
struct ds3000_state *state = fe->demodulator_priv;
+ int ret = 0;
dprintk("%s\n", __func__);
dprintk("Firmware is %zu bytes (%02x %02x .. %02x %02x)\n",
@@ -438,10 +440,10 @@ static int ds3000_load_firmware(struct dvb_frontend *fe,
/* Begin the firmware load process */
ds3000_writereg(state, 0xb2, 0x01);
/* write the entire firmware */
- ds3000_writeFW(state, 0xb0, fw->data, fw->size);
+ ret = ds3000_writeFW(state, 0xb0, fw->data, fw->size);
ds3000_writereg(state, 0xb2, 0x00);
- return 0;
+ return ret;
}
static int ds3000_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
--
http://palosaari.fi/
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