From 7d8dc1f7cd007a7ce94c5b4c20d63a8b8d6d7751 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= Date: Tue, 30 Nov 2021 18:29:06 +0100 Subject: [PATCH] PCI: aardvark: Clear all MSIs at setup MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We already clear all the other interrupts (ISR0, ISR1, HOST_CTRL_INT). Define a new macro PCIE_MSI_ALL_MASK and do the same clearing for MSIs, to ensure that we don't start receiving spurious interrupts. Use this new mask in advk_pcie_handle_msi(); Link: https://lore.kernel.org/r/20211130172913.9727-5-kabel@kernel.org Signed-off-by: Pali Rohár Signed-off-by: Marek Behún Signed-off-by: Lorenzo Pieralisi --- drivers/pci/controller/pci-aardvark.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -114,6 +114,7 @@ #define PCIE_MSI_ADDR_HIGH_REG (CONTROL_BASE_ADDR + 0x54) #define PCIE_MSI_STATUS_REG (CONTROL_BASE_ADDR + 0x58) #define PCIE_MSI_MASK_REG (CONTROL_BASE_ADDR + 0x5C) +#define PCIE_MSI_ALL_MASK GENMASK(31, 0) #define PCIE_MSI_PAYLOAD_REG (CONTROL_BASE_ADDR + 0x9C) #define PCIE_MSI_DATA_MASK GENMASK(15, 0) @@ -577,6 +578,7 @@ static void advk_pcie_setup_hw(struct ad advk_writel(pcie, reg, PCIE_CORE_CTRL2_REG); /* Clear all interrupts */ + advk_writel(pcie, PCIE_MSI_ALL_MASK, PCIE_MSI_STATUS_REG); advk_writel(pcie, PCIE_ISR0_ALL_MASK, PCIE_ISR0_REG); advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_REG); advk_writel(pcie, PCIE_IRQ_ALL_MASK, HOST_CTRL_INT_STATUS_REG); @@ -589,7 +591,7 @@ static void advk_pcie_setup_hw(struct ad advk_writel(pcie, PCIE_ISR1_ALL_MASK, PCIE_ISR1_MASK_REG); /* Unmask all MSIs */ - advk_writel(pcie, 0, PCIE_MSI_MASK_REG); + advk_writel(pcie, ~(u32)PCIE_MSI_ALL_MASK, PCIE_MSI_MASK_REG); /* Enable summary interrupt for GIC SPI source */ reg = PCIE_IRQ_ALL_MASK & (~PCIE_IRQ_ENABLE_INTS_MASK); @@ -1397,7 +1399,7 @@ static void advk_pcie_handle_msi(struct msi_mask = advk_readl(pcie, PCIE_MSI_MASK_REG); msi_val = advk_readl(pcie, PCIE_MSI_STATUS_REG); - msi_status = msi_val & ~msi_mask; + msi_status = msi_val & ((~msi_mask) & PCIE_MSI_ALL_MASK); for (msi_idx = 0; msi_idx < MSI_IRQ_NUM; msi_idx++) { if (!(BIT(msi_idx) & msi_status))