diff options
Diffstat (limited to 'target/linux/generic/backport-4.19/030-PCI-dwc-skip-MSI-init-if-MSIs-have-been-explicitly-d.patch')
| -rw-r--r-- | target/linux/generic/backport-4.19/030-PCI-dwc-skip-MSI-init-if-MSIs-have-been-explicitly-d.patch | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/target/linux/generic/backport-4.19/030-PCI-dwc-skip-MSI-init-if-MSIs-have-been-explicitly-d.patch b/target/linux/generic/backport-4.19/030-PCI-dwc-skip-MSI-init-if-MSIs-have-been-explicitly-d.patch deleted file mode 100644 index d87dfd26ef..0000000000 --- a/target/linux/generic/backport-4.19/030-PCI-dwc-skip-MSI-init-if-MSIs-have-been-explicitly-d.patch +++ /dev/null @@ -1,48 +0,0 @@ -From 26a3cdb73644090ff9a2fb68775ef61d361a8883 Mon Sep 17 00:00:00 2001 -From: Lucas Stach <l.stach@pengutronix.de> -Date: Wed, 27 Feb 2019 17:52:19 +0100 -Subject: [PATCH] PCI: dwc: skip MSI init if MSIs have been explicitly disabled - -commit 3afc8299f39a27b60e1519a28e18878ce878e7dd upstream. - -Since 7c5925afbc58 (PCI: dwc: Move MSI IRQs allocation to IRQ domains -hierarchical API) the MSI init claims one of the controller IRQs as a -chained IRQ line for the MSI controller. On some designs, like the i.MX6, -this line is shared with a PCIe legacy IRQ. When the line is claimed for -the MSI domain, any device trying to use this legacy IRQs will fail to -request this IRQ line. - -As MSI and legacy IRQs are already mutually exclusive on the DWC core, -as the core won't forward any legacy IRQs once any MSI has been enabled, -users wishing to use legacy IRQs already need to explictly disable MSI -support (usually via the pci=nomsi kernel commandline option). To avoid -any issues with MSI conflicting with legacy IRQs, just skip all of the -DWC MSI initalization, including the IRQ line claim, when MSI is disabled. - -Fixes: 7c5925afbc58 ("PCI: dwc: Move MSI IRQs allocation to IRQ domains hierarchical API") -Tested-by: Tim Harvey <tharvey@gateworks.com> -Signed-off-by: Lucas Stach <l.stach@pengutronix.de> -Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> -Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> -Cc: stable@vger.kernel.org -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - drivers/pci/controller/dwc/pcie-designware-host.c | 2 +- - 1 file changed, 1 insertion(+), 1 deletion(-) - -diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c -index 0fa9e8fdce66..b56e22262a77 100644 ---- a/drivers/pci/controller/dwc/pcie-designware-host.c -+++ b/drivers/pci/controller/dwc/pcie-designware-host.c -@@ -439,7 +439,7 @@ int dw_pcie_host_init(struct pcie_port *pp) - if (ret) - pci->num_viewport = 2; - -- if (IS_ENABLED(CONFIG_PCI_MSI)) { -+ if (IS_ENABLED(CONFIG_PCI_MSI) && pci_msi_enabled()) { - /* - * If a specific SoC driver needs to change the - * default number of vectors, it needs to implement --- -2.17.1 - |