From e0269c0c81b8e965050ebe2bc6a6f5e9ec00254e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= Date: Tue, 5 Oct 2021 20:09:45 +0200 Subject: PCI: aardvark: Do not clear status bits of masked interrupts MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit a7ca6d7fa3c02c032db5440ff392d96c04684c21 upstream. The PCIE_ISR1_REG says which interrupts are currently set / active, including those which are masked. The driver currently reads this register and looks if some unmasked interrupts are active, and if not, it clears status bits of _all_ interrupts, including the masked ones. This is incorrect, since, for example, some drivers may poll these bits. Remove this clearing, and also remove this early return statement completely, since it does not change functionality in any way. Link: https://lore.kernel.org/r/20211005180952.6812-7-kabel@kernel.org Fixes: 8c39d710363c ("PCI: aardvark: Add Aardvark PCI host controller driver") Signed-off-by: Pali Rohár Signed-off-by: Marek Behún Signed-off-by: Lorenzo Pieralisi Reviewed-by: Marek Behún Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/pci/controller/pci-aardvark.c | 6 ------ 1 file changed, 6 deletions(-) (limited to 'drivers/pci') diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 18753fd218a3..bb53fcd63856 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1055,12 +1055,6 @@ static void advk_pcie_handle_int(struct advk_pcie *pcie) isr1_mask = advk_readl(pcie, PCIE_ISR1_MASK_REG); isr1_status = isr1_val & ((~isr1_mask) & PCIE_ISR1_ALL_MASK); - if (!isr0_status && !isr1_status) { - advk_writel(pcie, isr0_val, PCIE_ISR0_REG); - advk_writel(pcie, isr1_val, PCIE_ISR1_REG); - return; - } - /* Process MSI interrupts */ if (isr0_status & PCIE_ISR0_MSI_INT_PENDING) advk_pcie_handle_msi(pcie); -- cgit v1.2.3