diff options
Diffstat (limited to 'target/linux/generic/pending-5.10/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch')
| -rw-r--r-- | target/linux/generic/pending-5.10/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/target/linux/generic/pending-5.10/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch b/target/linux/generic/pending-5.10/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch deleted file mode 100644 index b2d32f5566..0000000000 --- a/target/linux/generic/pending-5.10/850-0002-PCI-aardvark-Fix-reading-MSI-interrupt-number.patch +++ /dev/null @@ -1,57 +0,0 @@ -From a29a7d01cd778854e08108461cba321a63d98871 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> -Date: Fri, 2 Jul 2021 16:39:47 +0200 -Subject: [PATCH] PCI: aardvark: Fix reading MSI interrupt number -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -In advk_pcie_handle_msi() the authors expect that when bit i in the W1C -register PCIE_MSI_STATUS_REG is cleared, the PCIE_MSI_PAYLOAD_REG is -updated to contain the MSI number corresponding to index i. - -Experiments show that this is not so, and instead PCIE_MSI_PAYLOAD_REG -always contains the number of the last received MSI, overall. - -Do not read PCIE_MSI_PAYLOAD_REG register for determining MSI interrupt -number. Since Aardvark already forbids more than 32 interrupts and uses -own allocated hwirq numbers, the msi_idx already corresponds to the -received MSI number. - -Fixes: 8c39d710363c ("PCI: aardvark: Add Aardvark PCI host controller driver") -Signed-off-by: Pali Rohár <pali@kernel.org> -Signed-off-by: Marek Behún <kabel@kernel.org> ---- - drivers/pci/controller/pci-aardvark.c | 13 ++++++------- - 1 file changed, 6 insertions(+), 7 deletions(-) - ---- a/drivers/pci/controller/pci-aardvark.c -+++ b/drivers/pci/controller/pci-aardvark.c -@@ -1391,7 +1391,7 @@ static void advk_pcie_remove_irq_domain( - static void advk_pcie_handle_msi(struct advk_pcie *pcie) - { - u32 msi_val, msi_mask, msi_status, msi_idx; -- u16 msi_data; -+ int virq; - - msi_mask = advk_readl(pcie, PCIE_MSI_MASK_REG); - msi_val = advk_readl(pcie, PCIE_MSI_STATUS_REG); -@@ -1401,13 +1401,12 @@ static void advk_pcie_handle_msi(struct - if (!(BIT(msi_idx) & msi_status)) - continue; - -- /* -- * msi_idx contains bits [4:0] of the msi_data and msi_data -- * contains 16bit MSI interrupt number -- */ - advk_writel(pcie, BIT(msi_idx), PCIE_MSI_STATUS_REG); -- msi_data = advk_readl(pcie, PCIE_MSI_PAYLOAD_REG) & PCIE_MSI_DATA_MASK; -- generic_handle_irq(msi_data); -+ virq = irq_find_mapping(pcie->msi_inner_domain, msi_idx); -+ if (virq) -+ generic_handle_irq(virq); -+ else -+ dev_err_ratelimited(&pcie->pdev->dev, "unexpected MSI 0x%02x\n", msi_idx); - } - - advk_writel(pcie, PCIE_ISR0_MSI_INT_PENDING, |