diff options
| author |   Adrian Hunter <adrian.hunter@intel.com> | 2017-03-20 19:50:37 +0200 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2017-04-24 21:41:29 +0200 |
| commit | d1e4f74f911daee4d69b5fd0c81902f7d37de579 (patch) | |
| tree | 9ea1ec6a4b468a1c0b000273e6046bef6c579081 /drivers/mmc/host/sdhci.c | |
| parent | mmc: sdhci: Remove ->select_drive_strength() callback (diff) | |
| download | linux-dev-d1e4f74f911daee4d69b5fd0c81902f7d37de579.tar.xz linux-dev-d1e4f74f911daee4d69b5fd0c81902f7d37de579.zip | |
mmc: sdhci: Do not use spin lock in set_ios paths
The spin lock is not necessary in set_ios. Anything that is racing with
changes to the I/O state is already broken. The mmc core already provides
synchronization via "claiming" the host. So remove spin_lock and friends
from sdhci_set_ios and related callbacks.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index e055bd3f5fe8..5c2b35dd1c45 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1361,9 +1361,7 @@ void sdhci_enable_clk(struct sdhci_host *host, u16 clk) sdhci_dumpregs(host); return; } - spin_unlock_irq(&host->lock); udelay(10); - spin_lock_irq(&host->lock); } clk |= SDHCI_CLOCK_CARD_EN; @@ -1392,9 +1390,7 @@ static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode, { struct mmc_host *mmc = host->mmc; - spin_unlock_irq(&host->lock); mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); - spin_lock_irq(&host->lock); if (mode != MMC_POWER_OFF) sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL); @@ -1574,16 +1570,12 @@ EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling); static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { struct sdhci_host *host = mmc_priv(mmc); - unsigned long flags; u8 ctrl; if (ios->power_mode == MMC_POWER_UNDEFINED) return; - spin_lock_irqsave(&host->lock, flags); - if (host->flags & SDHCI_DEVICE_DEAD) { - spin_unlock_irqrestore(&host->lock, flags); if (!IS_ERR(mmc->supply.vmmc) && ios->power_mode == MMC_POWER_OFF) mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); @@ -1729,7 +1721,6 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); mmiowb(); - spin_unlock_irqrestore(&host->lock, flags); } static int sdhci_get_cd(struct mmc_host *mmc) |