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path: root/target/linux/generic/backport-4.9/101-arm-cns3xxx-use-actual-size-reads-for-PCIe.patch
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* kernel: bump 4.9 to 4.9.150Koen Vandeputte2019-01-161-6/+1
| | | | | | | | | | | | | | | Refreshed all patches. Remove upstreamed: - 096-mips-math-emu-Write-protect-delay-slot-emulation-pages.patch Altered patches: - 024-7-net-reorganize-struct-sock-for-better-data-locality.patch Compile-tested on: ar7 Runtime-tested on: none Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
* cns3xxx: use actual size reads for PCIeKoen Vandeputte2019-01-071-0/+51
upstream commit 802b7c06adc7 ("ARM: cns3xxx: Convert PCI to use generic config accessors") reimplemented cns3xxx_pci_read_config() using pci_generic_config_read32(), which preserved the property of only doing 32-bit reads. It also replaced cns3xxx_pci_write_config() with pci_generic_config_write(), so it changed writes from always being 32 bits to being the actual size, which works just fine. Due to: - The documentation does not mention that only 32 bit access is allowed. - Writes are already executed using the actual size - Extensive testing shows that 8b, 16b and 32b reads work as intended It makes perfectly sense to also swap 32 bit reading in favor of actual size. Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>