diff options
| author | Bjorn Andersson <bjorn.andersson@linaro.org> | 2016-10-07 21:23:13 -0700 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2016-10-31 15:41:55 -0700 |
| commit | bbd188092e3bd7536583b37e7d7d2e38a65de74d (patch) | |
| tree | b815146f5b7d48a1a90f5e6b49265ae27d3defda | |
| parent | e950604782440c8635d289552bb5db58658fcbe9 (diff) | |
| download | linux-bbd188092e3bd7536583b37e7d7d2e38a65de74d.tar.bz2 | |
rpmsg: Support drivers without primary endpoint
Some types of rpmsg drivers does not have a primary endpoint to tie
their existence upon, but wishes to create and destroy endpoints
dynamically, e.g. based on user interactions.
Allow rpmsg drivers to omit a driver callback to signal this case and
make the probe path not create a primary endpoint in this case.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| -rw-r--r-- | drivers/rpmsg/rpmsg_core.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c index 087d4db896c8..7561941ba413 100644 --- a/drivers/rpmsg/rpmsg_core.c +++ b/drivers/rpmsg/rpmsg_core.c @@ -347,27 +347,30 @@ static int rpmsg_dev_probe(struct device *dev) struct rpmsg_device *rpdev = to_rpmsg_device(dev); struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver); struct rpmsg_channel_info chinfo = {}; - struct rpmsg_endpoint *ept; + struct rpmsg_endpoint *ept = NULL; int err; - strncpy(chinfo.name, rpdev->id.name, RPMSG_NAME_SIZE); - chinfo.src = rpdev->src; - chinfo.dst = RPMSG_ADDR_ANY; + if (rpdrv->callback) { + strncpy(chinfo.name, rpdev->id.name, RPMSG_NAME_SIZE); + chinfo.src = rpdev->src; + chinfo.dst = RPMSG_ADDR_ANY; - ept = rpmsg_create_ept(rpdev, rpdrv->callback, NULL, chinfo); - if (!ept) { - dev_err(dev, "failed to create endpoint\n"); - err = -ENOMEM; - goto out; - } + ept = rpmsg_create_ept(rpdev, rpdrv->callback, NULL, chinfo); + if (!ept) { + dev_err(dev, "failed to create endpoint\n"); + err = -ENOMEM; + goto out; + } - rpdev->ept = ept; - rpdev->src = ept->addr; + rpdev->ept = ept; + rpdev->src = ept->addr; + } err = rpdrv->probe(rpdev); if (err) { dev_err(dev, "%s: failed: %d\n", __func__, err); - rpmsg_destroy_ept(ept); + if (ept) + rpmsg_destroy_ept(ept); goto out; } @@ -388,7 +391,8 @@ static int rpmsg_dev_remove(struct device *dev) rpdrv->remove(rpdev); - rpmsg_destroy_ept(rpdev->ept); + if (rpdev->ept) + rpmsg_destroy_ept(rpdev->ept); return err; } |