add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/remoteproc/mtk_scp_ipi.c
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@@ -164,13 +164,13 @@
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 	    WARN_ON(len > sizeof(send_obj->share_buf)) || WARN_ON(!buf))
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 		return -EINVAL;
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-	mutex_lock(&scp->send_lock);
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-
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 	ret = clk_prepare_enable(scp->clk);
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 	if (ret) {
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 		dev_err(scp->dev, "failed to enable clock\n");
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-		goto unlock_mutex;
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+		return ret;
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 	}
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+
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+	mutex_lock(&scp->send_lock);
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 	 /* Wait until SCP receives the last command */
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 	timeout = jiffies + msecs_to_jiffies(2000);
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@@ -178,7 +178,7 @@
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 		if (time_after(jiffies, timeout)) {
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 			dev_err(scp->dev, "%s: IPI timeout!\n", __func__);
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 			ret = -ETIMEDOUT;
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-			goto clock_disable;
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+			goto unlock_mutex;
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 		}
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 	} while (readl(scp->reg_base + scp->data->host_to_scp_reg));
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@@ -205,10 +205,9 @@
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 			ret = 0;
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 	}
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-clock_disable:
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-	clk_disable_unprepare(scp->clk);
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 unlock_mutex:
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 	mutex_unlock(&scp->send_lock);
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+	clk_disable_unprepare(scp->clk);
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 	return ret;
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 }