gpio: sim: mark the GPIO chip as a one that can sleep

commit 5a78d5db9c90c9dc84212f40a5f2687b7cafc8ec upstream.

Simulated chips use a mutex for synchronization in driver callbacks so
they must not be called from interrupt context. Set the can_sleep field
of the GPIO chip to true to force users to only use threaded irqs.

Fixes: cb8c474e79be ("gpio: sim: new testing module")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
index 803676e..fef12e5 100644 (file)
--- a/drivers/gpio/gpio-sim.c
+++ b/drivers/gpio/gpio-sim.c
@@ -425,6 +425,7 @@ static int gpio_sim_add_bank(struct fwnode_handle *swnode, struct device *dev)
        gc->set_config = gpio_sim_set_config;
        gc->to_irq = gpio_sim_to_irq;
        gc->free = gpio_sim_free;
+       gc->can_sleep = true;
 
        ret = devm_gpiochip_add_data(dev, gc, chip);
        if (ret)