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authorFrancesco Dolcini <francesco.dolcini@toradex.com>2024-01-22 19:05:51 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-01-27 18:13:53 -0800
commitfed99212acae832607817b24fa589f8aaf03103f (patch)
tree61851770d6f15f51be780ca4a8ec9ac1dc47b2b0 /sound/drivers
parentcf066f9334b9632ca1a8185118083a9218504e0a (diff)
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.c4
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);