| Message ID | 20170413233225.GA30465@dtor-ws (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
2017-04-14 1:32 GMT+02:00 Dmitry Torokhov <dmitry.torokhov@gmail.com>: > The name field in structure i2c_device_id is 20 characters, and we expect > it to be NULL-terminated, however we are trying to stuff it with 21 bytes > and thus NULL-terminator is lost. This causes issues when one creates > device with name "MICROCHIP_AR1021_I2C" as i2c core cuts off the last "C", > and automatic module loading by alias does not work as result. > > The -I2C suffix in the device name is superfluous, we know what bus we are > dealing with, so let's drop it. Also, no other driver uses capitals, and > the manufacturer name is normally not included, except in very rare cases > of incompatible name collisions. > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116211 > Fixes: dd4cae8bf166 ("Input: Add Microchip AR1021 i2c touchscreen") > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-By: Christian Gmeiner <christian.gmeiner@gmail.com> greets -- Christian Gmeiner, MSc https://www.youtube.com/user/AloryOFFICIAL https://soundcloud.com/christian-gmeiner -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 2017-04-14 01:32, Dmitry Torokhov wrote: > The name field in structure i2c_device_id is 20 characters, and we expect > it to be NULL-terminated, however we are trying to stuff it with 21 bytes > and thus NULL-terminator is lost. This causes issues when one creates > device with name "MICROCHIP_AR1021_I2C" as i2c core cuts off the last "C", > and automatic module loading by alias does not work as result. > > The -I2C suffix in the device name is superfluous, we know what bus we are > dealing with, so let's drop it. Also, no other driver uses capitals, and > the manufacturer name is normally not included, except in very rare cases > of incompatible name collisions. > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116211 > Fixes: dd4cae8bf166 ("Input: Add Microchip AR1021 i2c touchscreen") > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Tested-by: Martin Kepplinger <martin.kepplinger@ginzinger.com> -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thu, 13 Apr 2017 16:32:25 -0700, Dmitry Torokhov wrote: > The name field in structure i2c_device_id is 20 characters, and we expect > it to be NULL-terminated, however we are trying to stuff it with 21 bytes > and thus NULL-terminator is lost. This causes issues when one creates > device with name "MICROCHIP_AR1021_I2C" as i2c core cuts off the last "C", > and automatic module loading by alias does not work as result. > > The -I2C suffix in the device name is superfluous, we know what bus we are > dealing with, so let's drop it. Also, no other driver uses capitals, and > the manufacturer name is normally not included, except in very rare cases > of incompatible name collisions. > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116211 > Fixes: dd4cae8bf166 ("Input: Add Microchip AR1021 i2c touchscreen") > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> > --- > > V2: Changed MICROCHIP_AR1021 -> ar1021 as Jean suggested. > > drivers/input/touchscreen/ar1021_i2c.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > (...) Reviewed-by: Jean Delvare <jdelvare@suse.de> > diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c > index 2e7500edd477..6797e123925a 100644 > --- a/drivers/input/touchscreen/ar1021_i2c.c > +++ b/drivers/input/touchscreen/ar1021_i2c.c > @@ -151,7 +151,7 @@ static int __maybe_unused ar1021_i2c_resume(struct device *dev) > static SIMPLE_DEV_PM_OPS(ar1021_i2c_pm, ar1021_i2c_suspend, ar1021_i2c_resume); > > static const struct i2c_device_id ar1021_i2c_id[] = { > - { "MICROCHIP_AR1021_I2C", 0 }, > + { "ar1021", 0 }, > { }, > }; > MODULE_DEVICE_TABLE(i2c, ar1021_i2c_id);
diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c index 2e7500edd477..6797e123925a 100644 --- a/drivers/input/touchscreen/ar1021_i2c.c +++ b/drivers/input/touchscreen/ar1021_i2c.c @@ -151,7 +151,7 @@ static int __maybe_unused ar1021_i2c_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(ar1021_i2c_pm, ar1021_i2c_suspend, ar1021_i2c_resume); static const struct i2c_device_id ar1021_i2c_id[] = { - { "MICROCHIP_AR1021_I2C", 0 }, + { "ar1021", 0 }, { }, }; MODULE_DEVICE_TABLE(i2c, ar1021_i2c_id);
The name field in structure i2c_device_id is 20 characters, and we expect it to be NULL-terminated, however we are trying to stuff it with 21 bytes and thus NULL-terminator is lost. This causes issues when one creates device with name "MICROCHIP_AR1021_I2C" as i2c core cuts off the last "C", and automatic module loading by alias does not work as result. The -I2C suffix in the device name is superfluous, we know what bus we are dealing with, so let's drop it. Also, no other driver uses capitals, and the manufacturer name is normally not included, except in very rare cases of incompatible name collisions. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116211 Fixes: dd4cae8bf166 ("Input: Add Microchip AR1021 i2c touchscreen") Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> --- V2: Changed MICROCHIP_AR1021 -> ar1021 as Jean suggested. drivers/input/touchscreen/ar1021_i2c.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)