From 6bdc00d01e202ae11fa1cae0dacbef895434483d Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Fri, 28 Apr 2017 13:47:21 +0200 Subject: serdev: Restore serdev_device_write_buf for atomic context Starting with commit 6fe729c4bdae ("serdev: Add serdev_device_write subroutine") the function serdev_device_write_buf cannot be used in atomic context anymore (mutex_lock is sleeping). So restore the old behavior. Signed-off-by: Stefan Wahren Fixes: 6fe729c4bdae ("serdev: Add serdev_device_write subroutine") Acked-by: Rob Herring Reviewed-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serdev/core.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 433de5e..f71b473 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -122,6 +122,18 @@ void serdev_device_write_wakeup(struct serdev_device *serdev) } EXPORT_SYMBOL_GPL(serdev_device_write_wakeup); +int serdev_device_write_buf(struct serdev_device *serdev, + const unsigned char *buf, size_t count) +{ + struct serdev_controller *ctrl = serdev->ctrl; + + if (!ctrl || !ctrl->ops->write_buf) + return -EINVAL; + + return ctrl->ops->write_buf(ctrl, buf, count); +} +EXPORT_SYMBOL_GPL(serdev_device_write_buf); + int serdev_device_write(struct serdev_device *serdev, const unsigned char *buf, size_t count, unsigned long timeout) -- cgit v1.1