diff options
| -rw-r--r-- | target/linux/mediatek/patches-5.4/1010-pcie-mediatek-fix-clearing-interrupt-status.patch | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-5.4/1010-pcie-mediatek-fix-clearing-interrupt-status.patch b/target/linux/mediatek/patches-5.4/1010-pcie-mediatek-fix-clearing-interrupt-status.patch new file mode 100644 index 0000000000..d3ef78dc72 --- /dev/null +++ b/target/linux/mediatek/patches-5.4/1010-pcie-mediatek-fix-clearing-interrupt-status.patch @@ -0,0 +1,24 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Fri, 4 Sep 2020 18:33:27 +0200 +Subject: [PATCH] pcie-mediatek: fix clearing interrupt status + +Clearing the status needs to happen after running the handler, otherwise +we will get an extra spurious interrupt after the cause has been cleared + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/drivers/pci/controller/pcie-mediatek.c ++++ b/drivers/pci/controller/pcie-mediatek.c +@@ -616,10 +616,10 @@ static void mtk_pcie_intr_handler(struct + if (status & INTX_MASK) { + for_each_set_bit_from(bit, &status, PCI_NUM_INTX + INTX_SHIFT) { + /* Clear the INTx */ +- writel(1 << bit, port->base + PCIE_INT_STATUS); + virq = irq_find_mapping(port->irq_domain, + bit - INTX_SHIFT); + generic_handle_irq(virq); ++ writel(1 << bit, port->base + PCIE_INT_STATUS); + } + } + |