memory: samsung: exynos5422-dmc: Reduce protected code area in IRQ handler

Speed-up a bit this IRQ processing as there is no need to protect
return value or printing.

Signed-off-by: Bernard Zhao <bernard@vivo.com>
Acked-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c
index 22a43d6628336b224660d6004eae5e9fa0a15ae1..25196d6268e21d5d6d688619b84a5fa34754c7a9 100644 (file)
--- a/drivers/memory/samsung/exynos5422-dmc.c
+++ b/drivers/memory/samsung/exynos5422-dmc.c
@@ -1346,15 +1346,13 @@ static irqreturn_t dmc_irq_thread(int irq, void *priv)
        struct exynos5_dmc *dmc = priv;
 
        mutex_lock(&dmc->df->lock);
-
        exynos5_dmc_perf_events_check(dmc);
-
        res = update_devfreq(dmc->df);
+       mutex_unlock(&dmc->df->lock);
+
        if (res)
                dev_warn(dmc->dev, "devfreq failed with %d\n", res);
 
-       mutex_unlock(&dmc->df->lock);
-
        return IRQ_HANDLED;
 }