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slimbus: stream: add checks for invalid unprepare/disable usage 

slim_disable_stream() and slim_stream_unprepare() are exported, so add
sanity checks preventing unmatched/invalid calls.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221118065246.6835-6-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Krzysztof Kozlowski 2022-11-18 06:52:39 +00:00 committed by Greg Kroah-Hartman
parent 4594cb4b76
commit a82b1ec34e
1 changed files with 6 additions and 0 deletions
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6
drivers/slimbus/stream.c
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@ -414,6 +414,9 @@ int slim_stream_disable(struct slim_stream_runtime *stream)
struct slim_controller *ctrl = stream->dev->ctrl;
int ret, i;
if (!stream->ports || !stream->num_ports)
return -EINVAL;
if (ctrl->disable_stream)
ctrl->disable_stream(stream);
@ -445,6 +448,9 @@ int slim_stream_unprepare(struct slim_stream_runtime *stream)
{
int i;
if (!stream->ports || !stream->num_ports)
return -EINVAL;
for (i = 0; i < stream->num_ports; i++)
slim_disconnect_port(stream, &stream->ports[i]);