| Message ID | 1401716463-23457-3-git-send-email-lee.jones@linaro.org |
|---|---|
| State | New |
| Headers | show |
On Mon, 2 Jun 2014 14:41:02 +0100, Lee Jones <lee.jones@linaro.org> wrote: > Here we're providing dereference protection for i2c_match_id(), which > saves us having to do it each time it's called. We're also stripping > out the (now) needless check in i2c_device_match(). This patch paves > the way for other, similar code trimming. > > Signed-off-by: Lee Jones <lee.jones@linaro.org> Seems reasonable. Acked-by: Grant Likely <grant.likely@linaro.org> > --- > drivers/i2c/i2c-core.c | 10 +++++++--- > 1 file changed, 7 insertions(+), 3 deletions(-) > > diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c > index 2e47641..d0c7180 100644 > --- a/drivers/i2c/i2c-core.c > +++ b/drivers/i2c/i2c-core.c > @@ -83,6 +83,9 @@ void i2c_transfer_trace_unreg(void) > static const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id, > const struct i2c_client *client) > { > + if (!id) > + return NULL; > + > while (id->name[0]) { > if (strcmp(client->name, id->name) == 0) > return id; > @@ -108,9 +111,10 @@ static int i2c_device_match(struct device *dev, struct device_driver *drv) > return 1; > > driver = to_i2c_driver(drv); > - /* match on an id table if there is one */ > - if (driver->id_table) > - return i2c_match_id(driver->id_table, client) != NULL; > + > + /* Finally an I2C match */ > + if (i2c_match_id(driver->id_table, client)) > + return 1; > > return 0; > } > -- > 1.8.3.2 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 2e47641..d0c7180 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -83,6 +83,9 @@ void i2c_transfer_trace_unreg(void) static const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id, const struct i2c_client *client) { + if (!id) + return NULL; + while (id->name[0]) { if (strcmp(client->name, id->name) == 0) return id; @@ -108,9 +111,10 @@ static int i2c_device_match(struct device *dev, struct device_driver *drv) return 1; driver = to_i2c_driver(drv); - /* match on an id table if there is one */ - if (driver->id_table) - return i2c_match_id(driver->id_table, client) != NULL; + + /* Finally an I2C match */ + if (i2c_match_id(driver->id_table, client)) + return 1; return 0; }
Here we're providing dereference protection for i2c_match_id(), which saves us having to do it each time it's called. We're also stripping out the (now) needless check in i2c_device_match(). This patch paves the way for other, similar code trimming. Signed-off-by: Lee Jones <lee.jones@linaro.org> --- drivers/i2c/i2c-core.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)