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From: Cristian Marussi <cristian.marussi@arm.com>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com,
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Subject: [PATCH v5 11/14] firmware: arm_scmi: Reject SCMI drivers while in Raw
mode
Date: Thu, 3 Nov 2022 19:52:22 +0000
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| Series |
Introduce a unified API for SCMI Server testing
|
|
Commit Message
Cristian Marussi
Nov. 3, 2022, 7:52 p.m. UTC
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>
---
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 7c7f1a666d93..c5bc67a9c103 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -2380,6 +2380,12 @@ 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.