Merge "scsi: ufs: avoid spurious UFS host controller interrupts" (0b1523b7) · Commits · e / devices / android_kernel_sony_msm8994

drivers/scsi/ufs/ufshcd.c

+15 −0

Original line number	Original line	Diff line number	Diff line
	@@ -6637,6 +6637,21 @@ int ufshcd_init(struct ufs_hba hba, void __iomem mmio_base, unsigned int irq)
	init_waitqueue_head(&hba->dev_cmd.tag_wq);		init_waitqueue_head(&hba->dev_cmd.tag_wq);

	ufshcd_init_clk_gating(hba);		ufshcd_init_clk_gating(hba);

			/*
			* In order to avoid any spurious interrupt immediately after
			* registering UFS controller interrupt handler, clear any pending UFS
			* interrupt status and disable all the UFS interrupts.
			*/
			ufshcd_writel(hba, ufshcd_readl(hba, REG_INTERRUPT_STATUS),
			REG_INTERRUPT_STATUS);
			ufshcd_writel(hba, 0, REG_INTERRUPT_ENABLE);
			/*
			* Make sure that UFS interrupts are disabled and any pending interrupt
			* status is cleared before registering UFS interrupt handler.
			*/
			mb();

	/* IRQ registration */		/* IRQ registration */
	err = devm_request_irq(dev, irq, ufshcd_intr, IRQF_SHARED, UFSHCD, hba);		err = devm_request_irq(dev, irq, ufshcd_intr, IRQF_SHARED, UFSHCD, hba);
	if (err) {		if (err) {