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rpmsg: Allow callback to return errors

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Some rpmsg backends support holding on to and redelivering messages upon
failed handling of them, so provide a way for the callback to report and
error and allow the backends to handle this.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Bjorn Andersson
2016-09-01 15:28:08 -07:00
parent e88dae5da4
commit 4b83c52a21
3 changed files with 12 additions and 8 deletions
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6
samples/rpmsg/rpmsg_client_sample.c
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@@ -28,7 +28,7 @@ struct instance_data {
int rx_count;
};
static void rpmsg_sample_cb(struct rpmsg_device *rpdev, void *data, int len,
static int rpmsg_sample_cb(struct rpmsg_device *rpdev, void *data, int len,
void *priv, u32 src)
{
int ret;
@@ -43,13 +43,15 @@ static void rpmsg_sample_cb(struct rpmsg_device *rpdev, void *data, int len,
/* samples should not live forever */
if (idata->rx_count >= MSG_LIMIT) {
dev_info(&rpdev->dev, "goodbye!\n");
return;
return 0;
}
/* send a new message now */
ret = rpmsg_send(rpdev->ept, MSG, strlen(MSG));
if (ret)
dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
return 0;
}
static int rpmsg_sample_probe(struct rpmsg_device *rpdev)