[PATCH v2 8/9] firmware: arm_scmi: Reject SCMI drivers while in Raw mode
Cristian Marussi
cristian.marussi at arm.com
Thu Aug 25 07:11:51 PDT 2022
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 at arm.com>
---
drivers/firmware/arm_scmi/driver.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index fd131e499e15..7742581b94c7 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -2331,6 +2331,12 @@ 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.
--
2.32.0
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