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firmware: arm_scmi: Reject SCMI drivers when configured in raw mode

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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>
This commit is contained in:
Cristian Marussi
2023-01-18 12:14:23 +00:00
committed by Sudeep Holla
parent 74225707b3
commit ba80acb0df
1 changed files with 6 additions and 0 deletions
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drivers/firmware/arm_scmi/bus.c
+6
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@@ -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.