linux-kernel - [PATCH 4/6] firmware: qcom_scm: Suppress sysfs bind attributes

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Date:   Tue, 23 Feb 2021 13:45:37 -0800
From:   Stephen Boyd <swboyd@...omium.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Elliot Berman <eberman@...eaurora.org>,
        Brian Masney <masneyb@...tation.org>,
        Stephan Gerhold <stephan@...hold.net>,
        Jeffrey Hugo <jhugo@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>
Subject: [PATCH 4/6] firmware: qcom_scm: Suppress sysfs bind attributes

We don't want userspace ejecting this driver at runtime. Various other
drivers call into this code because it provides the mechanism to
communicate with the secure world on qcom SoCs. It should probe once and
be present forever after that.

Cc: Elliot Berman <eberman@...eaurora.org>
Cc: Brian Masney <masneyb@...tation.org>
Cc: Stephan Gerhold <stephan@...hold.net>
Cc: Jeffrey Hugo <jhugo@...eaurora.org>
Cc: Douglas Anderson <dianders@...omium.org>
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
 drivers/firmware/qcom_scm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 9ac84b5d6ce0..ee9cb545e73b 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -1301,6 +1301,7 @@ static struct platform_driver qcom_scm_driver = {
 	.driver = {
 		.name	= "qcom_scm",
 		.of_match_table = qcom_scm_dt_match,
+		.suppress_bind_attrs = true,
 	},
 	.probe = qcom_scm_probe,
 	.shutdown = qcom_scm_shutdown,
-- 
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