mmc: mxcmmc: replace spin_lock_irqsave with spin_lock in ISR

As you are already in ISR, it is unnecessary to call spin_lock_irqsave.
Signed-off-by: jun qian <hangdianqj@163.com>
Reviewed-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/mxcmmc.c

@@ -728,7 +728,6 @@ static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat)
 static irqreturn_t mxcmci_irq(int irq, void *devid)
 {
 	struct mxcmci_host *host = devid;
-	unsigned long flags;
 	bool sdio_irq;
 	u32 stat;
 
@@ -740,9 +739,9 @@ static irqreturn_t mxcmci_irq(int irq, void *devid)
 
 	dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat);
 
-	spin_lock_irqsave(&host->lock, flags);
+	spin_lock(&host->lock);
 	sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio;
-	spin_unlock_irqrestore(&host->lock, flags);
+	spin_unlock(&host->lock);
 
 	if (mxcmci_use_dma(host) && (stat & (STATUS_WRITE_OP_DONE)))
 		mxcmci_writel(host, STATUS_WRITE_OP_DONE, MMC_REG_STATUS);