diff mbox series

[4.19,259/271] mmc: sdhci-msm: fix mutex while in spinlock

Message ID 20190724191717.395301959@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman July 24, 2019, 7:22 p.m. UTC 
From: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>


commit 5e6b6651d22de109ebf48ca00d0373bc2c0cc080 upstream.

mutexes can sleep and therefore should not be taken while holding a
spinlock. move clk_get_rate (can sleep) outside the spinlock protected
region.

Fixes: 83736352e0ca ("mmc: sdhci-msm: Update DLL reset sequence")
Cc: stable@vger.kernel.org
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Reviewed-by: Vinod Koul <vkoul@kernel.org>

Acked-by: Adrian Hunter <adrian.hunter@intel.com>

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


---
 drivers/mmc/host/sdhci-msm.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
diff mbox series

Patch

--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -582,11 +582,14 @@  static int msm_init_cm_dll(struct sdhci_
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
 	int wait_cnt = 50;
-	unsigned long flags;
+	unsigned long flags, xo_clk = 0;
 	u32 config;
 	const struct sdhci_msm_offset *msm_offset =
 					msm_host->offset;
 
+	if (msm_host->use_14lpp_dll_reset && !IS_ERR_OR_NULL(msm_host->xo_clk))
+		xo_clk = clk_get_rate(msm_host->xo_clk);
+
 	spin_lock_irqsave(&host->lock, flags);
 
 	/*
@@ -634,10 +637,10 @@  static int msm_init_cm_dll(struct sdhci_
 		config &= CORE_FLL_CYCLE_CNT;
 		if (config)
 			mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 8),
-					clk_get_rate(msm_host->xo_clk));
+					xo_clk);
 		else
 			mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 4),
-					clk_get_rate(msm_host->xo_clk));
+					xo_clk);
 
 		config = readl_relaxed(host->ioaddr +
 				msm_offset->core_dll_config_2);