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rpmsg: Constify buffer passed to send API

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The rpmsg_send(), rpmsg_sendto() and other variants of sending
interfaces should only send the passed data, without modifying its
contents, so mark pointer 'data' as pointer to const.  All users of this
interface already follow this approach, so only the function
declarations have to be updated.

Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260317-rpmsg-send-const-v3-3-4d7fd27f037f@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Krzysztof Kozlowski
2026-03-17 13:36:52 +01:00
committed by Bjorn Andersson
parent 90dacbf4bf
commit b8077b4da2
7 changed files with 46 additions and 38 deletions
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8
drivers/rpmsg/rpmsg_core.c
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@@ -153,7 +153,7 @@ EXPORT_SYMBOL(rpmsg_destroy_ept);
*
* Return: 0 on success and an appropriate error value on failure.
*/
int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
int rpmsg_send(struct rpmsg_endpoint *ept, const void *data, int len)
{
if (WARN_ON(!ept))
return -EINVAL;
@@ -182,7 +182,7 @@ EXPORT_SYMBOL(rpmsg_send);
*
* Return: 0 on success and an appropriate error value on failure.
*/
int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
int rpmsg_sendto(struct rpmsg_endpoint *ept, const void *data, int len, u32 dst)
{
if (WARN_ON(!ept))
return -EINVAL;
@@ -210,7 +210,7 @@ EXPORT_SYMBOL(rpmsg_sendto);
*
* Return: 0 on success and an appropriate error value on failure.
*/
int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
int rpmsg_trysend(struct rpmsg_endpoint *ept, const void *data, int len)
{
if (WARN_ON(!ept))
return -EINVAL;
@@ -238,7 +238,7 @@ EXPORT_SYMBOL(rpmsg_trysend);
*
* Return: 0 on success and an appropriate error value on failure.
*/
int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
int rpmsg_trysendto(struct rpmsg_endpoint *ept, const void *data, int len, u32 dst)
{
if (WARN_ON(!ept))
return -EINVAL;