diff options
| author | Siddharth Gupta <sidgup@codeaurora.org> | 2021-06-15 05:21:08 +0300 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2021-06-23 21:40:22 +0300 |
| commit | c6659ee893e29912dd47f4d1d2db810fadf4d8fd (patch) | |
| tree | 0bb3077cc15910fddc50faeefd70907e1f55f8e9 /drivers/remoteproc | |
| parent | 0740ec0893ea1d74a217000d684e79b6e648bb9d (diff) | |
| download | linux-c6659ee893e29912dd47f4d1d2db810fadf4d8fd.tar.xz | |
remoteproc: core: Move cdev add before device add
When cdev_add is called after device_add has been called there is no
way for the userspace to know about the addition of a cdev as cdev_add
itself doesn't trigger a uevent notification, or for the kernel to
know about the change to devt. This results in two problems:
- mknod is never called for the cdev and hence no cdev appears on
devtmpfs.
- sysfs links to the new cdev are not established.
The cdev needs to be added and devt assigned before device_add() is
called in order for the relevant sysfs and devtmpfs entries to be
created and the uevent to be properly populated.
Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1623723671-5517-2-git-send-email-sidgup@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/remoteproc_core.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 6348aaa42bbb..9ad8c5f96500 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -2333,6 +2333,11 @@ int rproc_add(struct rproc *rproc) struct device *dev = &rproc->dev; int ret; + /* add char device for this remoteproc */ + ret = rproc_char_device_add(rproc); + if (ret < 0) + return ret; + ret = device_add(dev); if (ret < 0) return ret; @@ -2346,11 +2351,6 @@ int rproc_add(struct rproc *rproc) /* create debugfs entries */ rproc_create_debug_dir(rproc); - /* add char device for this remoteproc */ - ret = rproc_char_device_add(rproc); - if (ret < 0) - return ret; - /* if rproc is marked always-on, request it to boot */ if (rproc->auto_boot) { ret = rproc_trigger_auto_boot(rproc); |