kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Bluetooth: hci_bcm: use gpiod cansleep version

Browse source 
Some GPIO controller drivers request sleepable context and so can't
be accessed from IRQ context. Using gpiod_set/get_value accessors
with such controller leads to a kernel warning since they are
reserved for atomic context (according to the documentation).

Use the postfixed _cansleep version instead, indicating that context
is safe for sleeping if necessary. Note that this is the case here
since we never toggle the gpio neither from IRQ nor from a spinlocked
section.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Loic Poulain 2018-03-05 19:02:35 +01:00 committed by Marcel Holtmann
parent 8c59c264e5
commit fb2d466be9
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/bluetooth/hci_bcm.c
View file

@ -908,13 +908,13 @@ static inline int bcm_apple_get_resources(struct bcm_device *dev)
static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
{
gpiod_set_value(dev->device_wakeup, awake);
gpiod_set_value_cansleep(dev->device_wakeup, awake);
return 0;
}
static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
{
gpiod_set_value(dev->shutdown, powered);
gpiod_set_value_cansleep(dev->shutdown, powered);
return 0;
}