diff options
| author | Cristian Marussi <cristian.marussi@arm.com> | 2023-01-18 13:14:23 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2023-01-20 12:41:23 +0100 |
| commit | ba80acb0dfca87e6a6257932414350da85dde48f (patch) | |
| tree | 9ec8ea4add0ec5dcd6d66c53dc14444d94e793de /drivers/firmware | |
| parent | firmware: arm_scmi: Add debugfs ABI documentation for raw mode (diff) | |
| download | linux-ba80acb0dfca87e6a6257932414350da85dde48f.tar.xz linux-ba80acb0dfca87e6a6257932414350da85dde48f.zip | |
firmware: arm_scmi: Reject SCMI drivers when configured in raw mode
Reject SCMI driver registration when SCMI raw mode support is configured,
so as to avoid interferences between the SCMI raw mode transactions and the
normal SCMI stack operations.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-15-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/arm_scmi/bus.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c index 6228f1581fe3..8601d75f5b9b 100644 --- a/drivers/firmware/arm_scmi/bus.c +++ b/drivers/firmware/arm_scmi/bus.c @@ -59,6 +59,12 @@ static int scmi_protocol_device_request(const struct scmi_device_id *id_table) pr_debug("Requesting SCMI device (%s) for protocol %x\n", id_table->name, id_table->protocol_id); + if (IS_ENABLED(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT)) { + pr_warn("SCMI Raw mode active. Rejecting '%s'/0x%02X\n", + id_table->name, id_table->protocol_id); + return -EINVAL; + } + /* * Search for the matching protocol rdev list and then search * of any existent equally named device...fails if any duplicate found. |