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| author | Francesco Dolcini <francesco.dolcini@toradex.com> | 2024-01-22 19:05:51 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-27 18:13:53 -0800 |
| commit | fed99212acae832607817b24fa589f8aaf03103f (patch) | |
| tree | 61851770d6f15f51be780ca4a8ec9ac1dc47b2b0 /sound/drivers | |
| parent | cf066f9334b9632ca1a8185118083a9218504e0a (diff) | |
| download | linux-stable-fed99212acae832607817b24fa589f8aaf03103f.tar.gz linux-stable-fed99212acae832607817b24fa589f8aaf03103f.tar.bz2 linux-stable-fed99212acae832607817b24fa589f8aaf03103f.zip | |
treewide, serdev: change receive_buf() return type to size_t
receive_buf() is called from ttyport_receive_buf() that expects values
">= 0" from serdev_controller_receive_buf(), change its return type from
ssize_t to size_t.
The need for this clean-up was noticed while fixing a warning, see
commit 94d053942544 ("Bluetooth: btnxpuart: fix recv_buf() return value").
Changing the callback prototype to return an unsigned seems the best way
to document the API and ensure that is properly used.
GNSS drivers implementation of serdev receive_buf() callback return
directly the return value of gnss_insert_raw(). gnss_insert_raw()
returns a signed int, however this is not an issue since the value
returned is always positive, because of the kfifo_in() implementation.
gnss_insert_raw() could be changed to return also an unsigned, however
this is not implemented here as request by the GNSS maintainer Johan
Hovold.
Suggested-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/all/087be419-ec6b-47ad-851a-5e1e3ea5cfcc@kernel.org/
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for-iio
Reviewed-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Acked-by: Maximilian Luz <luzmaximilian@gmail.com> # for platform/surface
Acked-by: Lee Jones <lee@kernel.org>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20240122180551.34429-1-francesco@dolcini.it
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/drivers')
| -rw-r--r-- | sound/drivers/serial-generic.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/drivers/serial-generic.c b/sound/drivers/serial-generic.c index d6e5aafd697c..36409a56c675 100644 --- a/sound/drivers/serial-generic.c +++ b/sound/drivers/serial-generic.c @@ -100,8 +100,8 @@ static void snd_serial_generic_write_wakeup(struct serdev_device *serdev) snd_serial_generic_tx_wakeup(drvdata); } -static ssize_t snd_serial_generic_receive_buf(struct serdev_device *serdev, - const u8 *buf, size_t count) +static size_t snd_serial_generic_receive_buf(struct serdev_device *serdev, + const u8 *buf, size_t count) { int ret; struct snd_serial_generic *drvdata = serdev_device_get_drvdata(serdev); |