Most of the designware PCIe platforms have more than 2 viewports. So, patch
1/2 allows to fix viewport-2 for IO transaction for such cases.
When we have only two viewports, then patch 2/2 exchange viewport
assignment of memory and cfg transaction. It helps to fix a possibility of
corruption for memory transaction. However, there still exist possibility
of an IO transaction to be corrupted. We can not do much for <=2 viewports.
See, patch log for detail.
Dong Bo (1):
pcie/designware: Exchange viewport of `MEMORYs' and `CFGs/IOs'
Pratyush Anand (1):
pcie/designware: Keep viewport fixed for IO transaction if
num_viewport > 2
.../devicetree/bindings/pci/designware-pcie.txt | 3 ++
drivers/pci/host/pcie-designware.c | 32 +++++++++++++++-------
drivers/pci/host/pcie-designware.h | 1 +
3 files changed, 26 insertions(+), 10 deletions(-)
--
2.5.5
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