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authorStefan Wahren <stefan.wahren@i2se.com>2017-04-28 14:47:21 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-05-18 17:45:53 +0300
commit6bdc00d01e202ae11fa1cae0dacbef895434483d (patch)
treea63599f56e4bb468fa627f040d7f678cfe09be2e /drivers/tty
parent88e2582e90bb89fe895ff0dceeb5d5ab65d07997 (diff)
downloadlinux-6bdc00d01e202ae11fa1cae0dacbef895434483d.tar.xz
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 <stefan.wahren@i2se.com> Fixes: 6fe729c4bdae ("serdev: Add serdev_device_write subroutine") Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serdev/core.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index 433de5ea9b02..f71b47334149 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)