kmemdup has implemented the function that kmalloc() + memcpy().
We prefer to kmemdup rather than code opened implementation.
Signed-off-by: zhong jiang <[email protected]>
---
drivers/media/dvb-frontends/lgdt3306a.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/media/dvb-frontends/lgdt3306a.c b/drivers/media/dvb-frontends/lgdt3306a.c
index 0e1f5da..abec2e5 100644
--- a/drivers/media/dvb-frontends/lgdt3306a.c
+++ b/drivers/media/dvb-frontends/lgdt3306a.c
@@ -2205,15 +2205,13 @@ static int lgdt3306a_probe(struct i2c_client *client,
struct dvb_frontend *fe;
int ret;
- config = kzalloc(sizeof(struct lgdt3306a_config), GFP_KERNEL);
+ onfig = kmemdup(client->dev.platform_data,
+ sizeof(struct lgdt3306a_config), GFP_KERNEL);
if (config == NULL) {
ret = -ENOMEM;
goto fail;
}
- memcpy(config, client->dev.platform_data,
- sizeof(struct lgdt3306a_config));
-
config->i2c_addr = client->addr;
fe = lgdt3306a_attach(config, client->adapter);
if (fe == NULL) {
--
1.7.12.4
On Tue, Sep 18, 2018 at 11:42 AM zhong jiang <[email protected]> wrote:
>
> kmemdup has implemented the function that kmalloc() + memcpy().
> We prefer to kmemdup rather than code opened implementation.
>
> Signed-off-by: zhong jiang <[email protected]>
> ---
> drivers/media/dvb-frontends/lgdt3306a.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/dvb-frontends/lgdt3306a.c b/drivers/media/dvb-frontends/lgdt3306a.c
> index 0e1f5da..abec2e5 100644
> --- a/drivers/media/dvb-frontends/lgdt3306a.c
> +++ b/drivers/media/dvb-frontends/lgdt3306a.c
> @@ -2205,15 +2205,13 @@ static int lgdt3306a_probe(struct i2c_client *client,
> struct dvb_frontend *fe;
> int ret;
>
> - config = kzalloc(sizeof(struct lgdt3306a_config), GFP_KERNEL);
> + onfig = kmemdup(client->dev.platform_data,
> + sizeof(struct lgdt3306a_config), GFP_KERNEL);
> if (config == NULL) {
> ret = -ENOMEM;
> goto fail;
> }
>
> - memcpy(config, client->dev.platform_data,
> - sizeof(struct lgdt3306a_config));
> -
> config->i2c_addr = client->addr;
> fe = lgdt3306a_attach(config, client->adapter);
> if (fe == NULL) {
Thank you for this patch, Zhong. I suspect, however, that the patch
might contain a typo. It looks like the `c` got dropped off of the
`config` variable.
Did you test this before sending it in?
Thanks again and best regards,
Michael Krufky
Hi zhong,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v4.19-rc4 next-20180918]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/zhong-jiang/media-dvb-frontends-Use-kmemdup-instead-of-duplicating-its-function/20180919-063244
base: git://linuxtv.org/media_tree.git master
config: i386-randconfig-x002-201837 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_probe':
>> drivers/media/dvb-frontends/lgdt3306a.c:2208:2: error: 'onfig' undeclared (first use in this function); did you mean 'config'?
onfig = kmemdup(client->dev.platform_data,
^~~~~
config
drivers/media/dvb-frontends/lgdt3306a.c:2208:2: note: each undeclared identifier is reported only once for each function it appears in
vim +2208 drivers/media/dvb-frontends/lgdt3306a.c
2199
2200 static int lgdt3306a_probe(struct i2c_client *client,
2201 const struct i2c_device_id *id)
2202 {
2203 struct lgdt3306a_config *config;
2204 struct lgdt3306a_state *state;
2205 struct dvb_frontend *fe;
2206 int ret;
2207
> 2208 onfig = kmemdup(client->dev.platform_data,
2209 sizeof(struct lgdt3306a_config), GFP_KERNEL);
2210 if (config == NULL) {
2211 ret = -ENOMEM;
2212 goto fail;
2213 }
2214
2215 config->i2c_addr = client->addr;
2216 fe = lgdt3306a_attach(config, client->adapter);
2217 if (fe == NULL) {
2218 ret = -ENODEV;
2219 goto err_fe;
2220 }
2221
2222 i2c_set_clientdata(client, fe->demodulator_priv);
2223 state = fe->demodulator_priv;
2224 state->frontend.ops.release = NULL;
2225
2226 /* create mux i2c adapter for tuner */
2227 state->muxc = i2c_mux_alloc(client->adapter, &client->dev,
2228 1, 0, I2C_MUX_LOCKED,
2229 lgdt3306a_select, lgdt3306a_deselect);
2230 if (!state->muxc) {
2231 ret = -ENOMEM;
2232 goto err_kfree;
2233 }
2234 state->muxc->priv = client;
2235 ret = i2c_mux_add_adapter(state->muxc, 0, 0, 0);
2236 if (ret)
2237 goto err_kfree;
2238
2239 /* create dvb_frontend */
2240 fe->ops.i2c_gate_ctrl = NULL;
2241 *config->i2c_adapter = state->muxc->adapter[0];
2242 *config->fe = fe;
2243
2244 dev_info(&client->dev, "LG Electronics LGDT3306A successfully identified\n");
2245
2246 return 0;
2247
2248 err_kfree:
2249 kfree(state);
2250 err_fe:
2251 kfree(config);
2252 fail:
2253 dev_warn(&client->dev, "probe failed = %d\n", ret);
2254 return ret;
2255 }
2256
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
Hi zhong,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on linuxtv-media/master]
[also build test ERROR on v4.19-rc4 next-20180918]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/zhong-jiang/media-dvb-frontends-Use-kmemdup-instead-of-duplicating-its-function/20180919-063244
base: git://linuxtv.org/media_tree.git master
config: x86_64-randconfig-s2-09190757 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All errors (new ones prefixed by >>):
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_probe':
>> drivers/media/dvb-frontends/lgdt3306a.c:2208:2: error: 'onfig' undeclared (first use in this function)
onfig = kmemdup(client->dev.platform_data,
^~~~~
drivers/media/dvb-frontends/lgdt3306a.c:2208:2: note: each undeclared identifier is reported only once for each function it appears in
vim +/onfig +2208 drivers/media/dvb-frontends/lgdt3306a.c
2199
2200 static int lgdt3306a_probe(struct i2c_client *client,
2201 const struct i2c_device_id *id)
2202 {
2203 struct lgdt3306a_config *config;
2204 struct lgdt3306a_state *state;
2205 struct dvb_frontend *fe;
2206 int ret;
2207
> 2208 onfig = kmemdup(client->dev.platform_data,
2209 sizeof(struct lgdt3306a_config), GFP_KERNEL);
2210 if (config == NULL) {
2211 ret = -ENOMEM;
2212 goto fail;
2213 }
2214
2215 config->i2c_addr = client->addr;
2216 fe = lgdt3306a_attach(config, client->adapter);
2217 if (fe == NULL) {
2218 ret = -ENODEV;
2219 goto err_fe;
2220 }
2221
2222 i2c_set_clientdata(client, fe->demodulator_priv);
2223 state = fe->demodulator_priv;
2224 state->frontend.ops.release = NULL;
2225
2226 /* create mux i2c adapter for tuner */
2227 state->muxc = i2c_mux_alloc(client->adapter, &client->dev,
2228 1, 0, I2C_MUX_LOCKED,
2229 lgdt3306a_select, lgdt3306a_deselect);
2230 if (!state->muxc) {
2231 ret = -ENOMEM;
2232 goto err_kfree;
2233 }
2234 state->muxc->priv = client;
2235 ret = i2c_mux_add_adapter(state->muxc, 0, 0, 0);
2236 if (ret)
2237 goto err_kfree;
2238
2239 /* create dvb_frontend */
2240 fe->ops.i2c_gate_ctrl = NULL;
2241 *config->i2c_adapter = state->muxc->adapter[0];
2242 *config->fe = fe;
2243
2244 dev_info(&client->dev, "LG Electronics LGDT3306A successfully identified\n");
2245
2246 return 0;
2247
2248 err_kfree:
2249 kfree(state);
2250 err_fe:
2251 kfree(config);
2252 fail:
2253 dev_warn(&client->dev, "probe failed = %d\n", ret);
2254 return ret;
2255 }
2256
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
On 2018/9/19 3:58, Michael Ira Krufky wrote:
> On Tue, Sep 18, 2018 at 11:42 AM zhong jiang <[email protected]> wrote:
>> kmemdup has implemented the function that kmalloc() + memcpy().
>> We prefer to kmemdup rather than code opened implementation.
>>
>> Signed-off-by: zhong jiang <[email protected]>
>> ---
>> drivers/media/dvb-frontends/lgdt3306a.c | 6 ++----
>> 1 file changed, 2 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/media/dvb-frontends/lgdt3306a.c b/drivers/media/dvb-frontends/lgdt3306a.c
>> index 0e1f5da..abec2e5 100644
>> --- a/drivers/media/dvb-frontends/lgdt3306a.c
>> +++ b/drivers/media/dvb-frontends/lgdt3306a.c
>> @@ -2205,15 +2205,13 @@ static int lgdt3306a_probe(struct i2c_client *client,
>> struct dvb_frontend *fe;
>> int ret;
>>
>> - config = kzalloc(sizeof(struct lgdt3306a_config), GFP_KERNEL);
>> + onfig = kmemdup(client->dev.platform_data,
>> + sizeof(struct lgdt3306a_config), GFP_KERNEL);
>> if (config == NULL) {
>> ret = -ENOMEM;
>> goto fail;
>> }
>>
>> - memcpy(config, client->dev.platform_data,
>> - sizeof(struct lgdt3306a_config));
>> -
>> config->i2c_addr = client->addr;
>> fe = lgdt3306a_attach(config, client->adapter);
>> if (fe == NULL) {
> Thank you for this patch, Zhong. I suspect, however, that the patch
> might contain a typo. It looks like the `c` got dropped off of the
> `config` variable.
I am sorry. It's my fault.:-[ . Will repost
Thanks,
zhong jiang
> Did you test this before sending it in?
>
> Thanks again and best regards,
>
> Michael Krufky
>
> .
>