mmc: mtk-sd: Clear interrupts when cqe off/disable

stable inclusion
from stable-v5.10.141
commit 9d36e2c264f7c7be02b0fb903871220782f041c0
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I685FC

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9d36e2c264f7c7be02b0fb903871220782f041c0

--------------------------------

[ Upstream commit cc5d1692 ]

Currently we don't clear MSDC interrupts when cqe off/disable, which led
to the data complete interrupt will be reserved for the next command.
If the next command with data transfer after cqe off/disable, we process
the CMD ready interrupt and trigger DMA start for data, but the data
complete interrupt is already exists, then SW assume that the data transfer
is complete, SW will trigger DMA stop, but the data may not be transmitted
yet or is transmitting, so we may encounter the following error:
mtk-msdc 11230000.mmc: CMD bus busy detected.
Signed-off-by: NWenbin Mei <wenbin.mei@mediatek.com>
Fixes: 88bd652b ("mmc: mediatek: command queue support")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220728080048.21336-1-wenbin.mei@mediatek.comSigned-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>
Reviewed-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/mmc/host/mtk-sd.c

@@ -2293,6 +2293,9 @@ static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery)
 	/* disable busy check */
 	sdr_clr_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL);
 
+	val = readl(host->base + MSDC_INT);
+	writel(val, host->base + MSDC_INT);
+
 	if (recovery) {
 		sdr_set_field(host->base + MSDC_DMA_CTRL,
 			      MSDC_DMA_CTRL_STOP, 1);
@@ -2693,11 +2696,14 @@ static int __maybe_unused msdc_suspend(struct device *dev)
 {
 	struct mmc_host *mmc = dev_get_drvdata(dev);
 	int ret;
+	u32 val;
 
 	if (mmc->caps2 & MMC_CAP2_CQE) {
 		ret = cqhci_suspend(mmc);
 		if (ret)
 			return ret;
+		val = readl(((struct msdc_host *)mmc_priv(mmc))->base + MSDC_INT);
+		writel(val, ((struct msdc_host *)mmc_priv(mmc))->base + MSDC_INT);
 	}
 
 	return pm_runtime_force_suspend(dev);