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From:   Puranjay Mohan <p-mohan@ti.com>
To:     <kishon@ti.com>, <vigneshr@ti.com>, <s-anna@ti.com>,
        <bjorn.andersson@linaro.org>, <mathieu.poirier@linaro.org>,
        <linux-remoteproc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>
CC:     Puranjay Mohan <p-mohan@ti.com>
Subject: [PATCH v5 2/2] remoteproc: wkup_m3: Set sysfs_read_only flag
Date:   Wed, 16 Feb 2022 13:42:24 +0530
Message-ID: <20220216081224.9956-3-p-mohan@ti.com>
In-Reply-To: <20220216081224.9956-1-p-mohan@ti.com>
References: <20220216081224.9956-1-p-mohan@ti.com>
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From: Suman Anna <s-anna@ti.com>

The Wakeup M3 remote processor is controlled by the wkup_m3_ipc
client driver, so set the newly introduced 'sysfs_read_only' flag
to not allow any overriding of the remoteproc firmware, state,
recovery, or coredump from userspace.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Puranjay Mohan <p-mohan@ti.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
Changes in v4->v5
rename deny_sysfs_ops to sysfs_read_only
---
drivers/remoteproc/wkup_m3_rproc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/remoteproc/wkup_m3_rproc.c b/drivers/remoteproc/wkup_m3_rproc.c
index 484f7605823e..a0c204cb0979 100644
--- a/drivers/remoteproc/wkup_m3_rproc.c
+++ b/drivers/remoteproc/wkup_m3_rproc.c
@@ -163,6 +163,7 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev)
 	}
 
 	rproc->auto_boot = false;
+	rproc->sysfs_read_only = true;
 
 	wkupm3 = rproc->priv;
 	wkupm3->rproc = rproc;
-- 
2.17.1