Hi Geert,
On 4/1/19 9:08 AM, Geert Uytterhoeven wrote:
Hi Jacek,
On Sun, Mar 31, 2019 at 1:01 PM Jacek Anaszewski
<jacek.anaszew...@gmail.com> wrote:
On 3/31/19 11:06 AM, Geert Uytterhoeven wrote:
On Sun, Mar 10, 2019 at 9:40 PM Jacek Anaszewski
<jacek.anaszew...@gmail.com> wrote:
On 3/9/19 7:04 AM, Kangjie Lu wrote:
In case of_match_device cannot find a match, the fixes returns
-EINVAL to avoid NULL pointer dereference.
Signed-off-by: Kangjie Lu <k...@umn.edu>
---
drivers/leds/leds-pca9532.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index 7fea18b0c15d..4b0335591728 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -513,6 +513,7 @@ static int pca9532_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int devid;
+ const struct of_device_id *of_id;
struct pca9532_data *data = i2c_get_clientdata(client);
struct pca9532_platform_data *pca9532_pdata =
dev_get_platdata(&client->dev);
@@ -528,8 +529,11 @@ static int pca9532_probe(struct i2c_client *client,
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
- devid = (int)(uintptr_t)of_match_device(
- of_pca9532_leds_match, &client->dev)->data;
+ of_id = of_match_device(of_pca9532_leds_match,
+ &client->dev);
+ if (unlikely(!of_id))
Use of unlikey() is frowned upon.
What do you mean? Can you give some reference?
I have more memories of this being discussed, but I could find only
https://lwn.net/Articles/420019/
Thanks!
It may be useful for some heavily used core code, but not in most drivers
or uncritical code like probe paths, due to:
- many people getting it wrong,
- usually it doesn't make any difference at all.
Applied to the for-5.2 branch of linux-leds.git.
And also as a fix for v5.1...
Yes, but it had been in linux-next for almost two weeks before that.
Sorry, I only noticed when it got upstream.
No problem.
--
Best regards,
Jacek Anaszewski
