diff options
Diffstat (limited to 'meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch')
| -rw-r--r-- | meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch b/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch new file mode 100644 index 000000000..835f36da3 --- /dev/null +++ b/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch @@ -0,0 +1,31 @@ +From 77765c2a47ce43911b8fe7b09f037c9bc13008ca Mon Sep 17 00:00:00 2001 +From: Jeff Kubascik <jeff.kubascik@dornerworks.com> +Date: Tue, 30 Jul 2019 08:49:56 -0400 +Subject: [PATCH 3/4] Fix PCIe in dom0 for RPi4 + +There is an issue where the Broadcom PCIe driver and Xen swiotlb layer +invoke each other's dma alloc function recursively until the stack blows +up. The cause appears to be due to arch_setup_dma_ops being called +more than once for the device, possibly through of_dma_configure, and +screwing up the dma_ops pointers. This patch adds a check to make sure +that the xen_dma_ops are applied only once for a device. +--- + arch/arm64/mm/dma-mapping.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c +index d3a5bb16f..243a3b9be 100644 +--- a/arch/arm64/mm/dma-mapping.c ++++ b/arch/arm64/mm/dma-mapping.c +@@ -895,7 +895,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, + __iommu_setup_dma_ops(dev, dma_base, size, iommu); + + #ifdef CONFIG_XEN +- if (xen_initial_domain()) { ++ if (!dev->archdata.dev_dma_ops && xen_initial_domain()) { + dev->archdata.dev_dma_ops = dev->dma_ops; + dev->dma_ops = xen_dma_ops; + } +-- +2.17.1 + |