linux-kernel - [PATCH 4.5 201/238] mmc: tegra: properly disable card clock

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Message-Id: <20160410183507.276796263@linuxfoundation.org>
Date:	Sun, 10 Apr 2016 11:36:18 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Lucas Stach <dev@...xeye.de>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 4.5 201/238] mmc: tegra: properly disable card clock

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lucas Stach <dev@...xeye.de>

commit 3491b69045b1926a198ba70dc1296ca253f2fbdd upstream.

The new code to do the clock rate setting externally to the SDMMC
module has a shortcut to not propagate changes with a 0 rate to
the CAR by simply bailing out. This breaks proper cutting of the
card clock. Fix it by directly calling the correct sdhci function.

Fixes: a8e326a911d3 "mmc: tegra: implement module external clock change"
Signed-off-by: Lucas Stach <dev@...xeye.de>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mmc/host/sdhci-tegra.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -194,7 +194,7 @@ static void tegra_sdhci_set_clock(struct
 	unsigned long host_clk;
 
 	if (!clock)
-		return;
+		return sdhci_set_clock(host, clock);
 
 	host_clk = tegra_host->ddr_signaling ? clock * 2 : clock;
 	clk_set_rate(pltfm_host->clk, host_clk);