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| author | Cristian Marussi <cristian.marussi@arm.com> | 2021-03-16 15:49:02 +0300 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2021-03-30 18:35:16 +0300 |
| commit | f5800e0bf6f9b7ff7dfa4db8b0681bd062eb16a4 (patch) | |
| tree | b8f74aaac9f4698e36c7b6a66edaf9312a2c8f62 /drivers/firmware/arm_scmi/bus.c | |
| parent | aa1fd3e4cb976248651c319bb0ef929345958cf4 (diff) | |
| download | linux-f5800e0bf6f9b7ff7dfa4db8b0681bd062eb16a4.tar.xz | |
firmware: arm_scmi: Add protocol modularization support
Extend SCMI protocols accounting mechanism to address possible module
usage and add the support to possibly define new protocols as loadable
modules.
Keep the standard protocols built into the SCMI core.
Link: https://lore.kernel.org/r/20210316124903.35011-38-cristian.marussi@arm.com
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi/bus.c')
| -rw-r--r-- | drivers/firmware/arm_scmi/bus.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c index 992d50e10111..aadf2da21561 100644 --- a/drivers/firmware/arm_scmi/bus.c +++ b/drivers/firmware/arm_scmi/bus.c @@ -56,7 +56,7 @@ const struct scmi_protocol *scmi_protocol_get(int protocol_id) const struct scmi_protocol *proto; proto = idr_find(&scmi_protocols, protocol_id); - if (!proto) { + if (!proto || !try_module_get(proto->owner)) { pr_warn("SCMI Protocol 0x%x not found!\n", protocol_id); return NULL; } @@ -66,6 +66,15 @@ const struct scmi_protocol *scmi_protocol_get(int protocol_id) return proto; } +void scmi_protocol_put(int protocol_id) +{ + const struct scmi_protocol *proto; + + proto = idr_find(&scmi_protocols, protocol_id); + if (proto) + module_put(proto->owner); +} + static int scmi_dev_probe(struct device *dev) { struct scmi_driver *scmi_drv = to_scmi_driver(dev->driver); |