openwrt/target/linux/cns3xxx/patches-4.19/130-Extend-PCIE_BUS_PEER2PEER-to-set-MRSS-128-to-fix-CNS3xxx-BM-DMA..patch
Hauke Mehrtens 6062d85892 kernel: Update kernel 4.19 to version 4.19.131
Fixes:
- CVE-2020-10757

The "mtd: rawnand: Pass a nand_chip object to nand_release()" commit was
backported which needed some adaptations to other code.

Run tested: ath79
Build tested: ath79

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2020-07-04 21:12:42 +02:00

24 lines
891 B
Diff

--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2655,7 +2655,8 @@ static void pcie_write_mrrs(struct pci_d
* In the "safe" case, do not configure the MRRS. There appear to be
* issues with setting MRRS to 0 on a number of devices.
*/
- if (pcie_bus_config != PCIE_BUS_PERFORMANCE)
+ if (pcie_bus_config != PCIE_BUS_PERFORMANCE &&
+ pcie_bus_config != PCIE_BUS_PEER2PEER)
return;
/*
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -868,7 +868,7 @@ enum pcie_bus_config_types {
PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
- PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
+ PCIE_BUS_PEER2PEER, /* set MPS and MRSS to 128 for all devices */
};
extern enum pcie_bus_config_types pcie_bus_config;