| Message ID | 20200512110827.39475-1-bernard@vivo.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2] memory/samsung: reduce unnecessary mutex lock area | expand |
diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c index 22a43d662833..25196d6268e2 100644 --- 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; }
Maybe dmc->df->lock seems not needed to protect "if (ret) & dev_warn" branch. Maybe this change speed up the code a bit. Signed-off-by: Bernard Zhao <bernard@vivo.com> ---- Changes since v1: *change release lock before the if statement. *revert dmc->df->lock mutex lock to protect function exynos5_dmc_perf_events_check Link for V1: *https://lore.kernel.org/patchwork/patch/1238888/ --- drivers/memory/samsung/exynos5422-dmc.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)