On Wed, Oct 08, 2014 at 11:25:42AM -0700, Jason Gerecke wrote: > Repeated connect/disconnect cycles under GNOME can trigger an occasional > OOPS from within e.g. wacom_led_select_store, presumably due to a timing > issue where userspace begins setting a value immediately before the > device disconnects and our shared data is whisked away. > > Signed-off-by: Jason Gerecke <killertofu@xxxxxxxxx> > --- > Changes in v2: > * Added in missing escape character > > drivers/hid/wacom_sys.c | 13 ++++++++++++- > 1 file changed, 12 insertions(+), 1 deletion(-) > > diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c > index 8593047..265429b 100644 > --- a/drivers/hid/wacom_sys.c > +++ b/drivers/hid/wacom_sys.c > @@ -641,6 +641,9 @@ static ssize_t wacom_led_select_store(struct device *dev, int set_id, > unsigned int id; > int err; > > + if (!wacom) > + return -ENODEV; > + Strong NAK. If device could disappear before this check it could as well disappear after your check. This patch does not solve anything. > err = kstrtouint(buf, 10, &id); > if (err) > return err; Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
