linux-kernel - [PATCH 1/4] mmc: core: Return from mmc_set_clock if hz is already set to ios.clock

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Date:   Tue, 20 Dec 2016 11:23:16 +0530
From:   Ritesh Harjani <riteshh@...eaurora.org>
To:     ulf.hansson@...aro.org, adrian.hunter@...el.com
Cc:     linux-mmc@...r.kernel.org, shawn.lin@...k-chips.com,
        linux-kernel@...r.kernel.org, stummala@...eaurora.org,
        georgi.djakov@...aro.org, linux-arm-msm@...r.kernel.org,
        pramod.gurav@...aro.org, jeremymc@...hat.com,
        venkatg@...eaurora.org, asutoshd@...eaurora.org,
        Ritesh Harjani <riteshh@...eaurora.org>
Subject: [PATCH 1/4] mmc: core: Return from mmc_set_clock if hz is already set to ios.clock

Signed-off-by: Ritesh Harjani <riteshh@...eaurora.org>
---
 drivers/mmc/core/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 543eadd..125f8a9 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1139,6 +1139,9 @@ void mmc_set_clock(struct mmc_host *host, unsigned int hz)
 	if (hz > host->f_max)
 		hz = host->f_max;
 
+	if (hz == host->ios.clock)
+		return;
+
 	host->ios.clock = hz;
 	mmc_set_ios(host);
 }
-- 
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