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(-)
--- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -584,11 +584,14 @@ 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);
/* @@ -636,10 +639,10 @@ 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);