linux-kernel - [PATCH v5 05/13] mmc: sdhci-of-arasan: fix clk issue in sdhci_arasan

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Date:	Tue, 16 Feb 2016 21:08:23 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	<ulf.hansson@...aro.org>, <adrian.hunter@...el.com>,
	<arnd@...db.de>, <ludovic.desroches@...el.com>,
	<swarren@...dotorg.org>, <lee@...nel.org>, <eric@...olt.net>,
	<michal.simek@...inx.com>, <soren.brinkmann@...inx.com>,
	<srinivas.kandagatla@...il.com>, <maxime.coquelin@...com>,
	<patrice.chotard@...com>, <thierry.reding@...il.com>,
	<sebastian.hesselbarth@...il.com>, <kernel@...inux.com>
CC:	<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-tegra@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-rpi-kernel@...ts.infradead.org>,
	Jisheng Zhang <jszhang@...vell.com>
Subject: [PATCH v5 05/13] mmc: sdhci-of-arasan: fix clk issue in sdhci_arasan_remove()

sdhci_pltfm_unregister() could operate host's registers, it will cause
problems if the clk is already disabled and unprepared. Fix this issue
by moving the clk_disable_unprepare() call to the end of remove
function.

Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
Acked-by: Sören Brinkmann <soren.brinkmann@...inx.com>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
---
 drivers/mmc/host/sdhci-of-arasan.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index 5d9fdb3..8b4f8f7 100644
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -201,13 +201,16 @@ clk_dis_ahb:
 
 static int sdhci_arasan_remove(struct platform_device *pdev)
 {
+	int ret;
 	struct sdhci_host *host = platform_get_drvdata(pdev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_arasan_data *sdhci_arasan = pltfm_host->priv;
 
+	ret = sdhci_pltfm_unregister(pdev);
+
 	clk_disable_unprepare(sdhci_arasan->clk_ahb);
 
-	return sdhci_pltfm_unregister(pdev);
+	return ret;
 }
 
 static const struct of_device_id sdhci_arasan_of_match[] = {
-- 
2.7.0