diff options
| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2019-08-12 19:04:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-10 12:35:20 +0300 |
| commit | 3091859b0b5e5f3c03d809dd7f1b915355b24076 (patch) | |
| tree | 462389d1d6dfe4081fd2ca03c2262d65b0be236b | |
| parent | e8fd4f47b22470e2c1f01f8defce0f4147a4d342 (diff) | |
| download | linux-3091859b0b5e5f3c03d809dd7f1b915355b24076.tar.xz | |
HID: cp2112: prevent sleeping function called from invalid context
[ Upstream commit 2d05dba2b25ecb0f8fc3a0b4eb2232da6454a47b ]
When calling request_threaded_irq() with a CP2112, the function
cp2112_gpio_irq_startup() is called in a IRQ context.
Therefore we can not sleep, and we can not call
cp2112_gpio_direction_input() there.
Move the call to cp2112_gpio_direction_input() earlier to have a working
driver.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/hid/hid-cp2112.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/hid/hid-cp2112.c b/drivers/hid/hid-cp2112.c index 8bbe3d0cbe5d..8fd44407a0df 100644 --- a/drivers/hid/hid-cp2112.c +++ b/drivers/hid/hid-cp2112.c @@ -1152,8 +1152,6 @@ static unsigned int cp2112_gpio_irq_startup(struct irq_data *d) INIT_DELAYED_WORK(&dev->gpio_poll_worker, cp2112_gpio_poll_callback); - cp2112_gpio_direction_input(gc, d->hwirq); - if (!dev->gpio_poll) { dev->gpio_poll = true; schedule_delayed_work(&dev->gpio_poll_worker, 0); @@ -1201,6 +1199,12 @@ static int __maybe_unused cp2112_allocate_irq(struct cp2112_device *dev, return PTR_ERR(dev->desc[pin]); } + ret = cp2112_gpio_direction_input(&dev->gc, pin); + if (ret < 0) { + dev_err(dev->gc.parent, "Failed to set GPIO to input dir\n"); + goto err_desc; + } + ret = gpiochip_lock_as_irq(&dev->gc, pin); if (ret) { dev_err(dev->gc.parent, "Failed to lock GPIO as interrupt\n"); |