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| author |   Stefan Wahren <stefan.wahren@i2se.com> | 2017-04-28 13:47:21 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-18 16:45:53 +0200 |
| commit | 6bdc00d01e202ae11fa1cae0dacbef895434483d (patch) | |
| tree | a63599f56e4bb468fa627f040d7f678cfe09be2e /drivers/tty | |
| parent | serial: core: fix crash in uart_suspend_port (diff) | |
| download | linux-dev-6bdc00d01e202ae11fa1cae0dacbef895434483d.tar.xz linux-dev-6bdc00d01e202ae11fa1cae0dacbef895434483d.zip | |
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.c | 12 |
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) |