From: Tian Tao <tiantao6@hisilicon.com>
Date: Fri, 6 Nov 2020 01:56:53 +0000 (+0800)
Subject: mmc: dw_mmc: replace spin_lock_irqsave by spin_lock in hard IRQ
X-Git-Tag: v5.15~2209^2~47
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9f7d4c916c42ec310d17dc0ea8f4ebf64aa1bbf1;p=platform%2Fkernel%2Flinux-starfive.git

mmc: dw_mmc: replace spin_lock_irqsave by spin_lock in hard IRQ

The code has been in a irq-disabled context since it is hard IRQ. There
is no necessity to do it again.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Link: https://lore.kernel.org/r/1604627813-59785-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 43c5795..a524443 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -2617,7 +2617,6 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
 	struct dw_mci *host = dev_id;
 	u32 pending;
 	struct dw_mci_slot *slot = host->slot;
-	unsigned long irqflags;
 
 	pending = mci_readl(host, MINTSTS); /* read-only mask reg */
 
@@ -2632,15 +2631,15 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
 			 * Hold the lock; we know cmd11_timer can't be kicked
 			 * off after the lock is released, so safe to delete.
 			 */
-			spin_lock_irqsave(&host->irq_lock, irqflags);
+			spin_lock(&host->irq_lock);
 			dw_mci_cmd_interrupt(host, pending);
-			spin_unlock_irqrestore(&host->irq_lock, irqflags);
+			spin_unlock(&host->irq_lock);
 
 			del_timer(&host->cmd11_timer);
 		}
 
 		if (pending & DW_MCI_CMD_ERROR_FLAGS) {
-			spin_lock_irqsave(&host->irq_lock, irqflags);
+			spin_lock(&host->irq_lock);
 
 			del_timer(&host->cto_timer);
 			mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS);
@@ -2648,7 +2647,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
 			smp_wmb(); /* drain writebuffer */
 			set_bit(EVENT_CMD_COMPLETE, &host->pending_events);
 
-			spin_unlock_irqrestore(&host->irq_lock, irqflags);
+			spin_unlock(&host->irq_lock);
 		}
 
 		if (pending & DW_MCI_DATA_ERROR_FLAGS) {
@@ -2661,7 +2660,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
 		}
 
 		if (pending & SDMMC_INT_DATA_OVER) {
-			spin_lock_irqsave(&host->irq_lock, irqflags);
+			spin_lock(&host->irq_lock);
 
 			del_timer(&host->dto_timer);
 
@@ -2676,7 +2675,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
 			set_bit(EVENT_DATA_COMPLETE, &host->pending_events);
 			tasklet_schedule(&host->tasklet);
 
-			spin_unlock_irqrestore(&host->irq_lock, irqflags);
+			spin_unlock(&host->irq_lock);
 		}
 
 		if (pending & SDMMC_INT_RXDR) {
@@ -2692,12 +2691,12 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
 		}
 
 		if (pending & SDMMC_INT_CMD_DONE) {
-			spin_lock_irqsave(&host->irq_lock, irqflags);
+			spin_lock(&host->irq_lock);
 
 			mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE);
 			dw_mci_cmd_interrupt(host, pending);
 
-			spin_unlock_irqrestore(&host->irq_lock, irqflags);
+			spin_unlock(&host->irq_lock);
 		}
 
 		if (pending & SDMMC_INT_CD) {