PCI: aardvark: Fix preserving PCI_EXP_RTCTL_CRSSVE flag on emulated bridge
[ Upstream commit d419052bc6c60fa4ab2b5a51d5f1e55a66e2b4ff ] Commit 43f5c77bcbd2 ("PCI: aardvark: Fix reporting CRS value") started using CRSSVE flag for handling CRS responses. PCI_EXP_RTCTL_CRSSVE flag is stored only in emulated config space buffer and there is handler for PCI_EXP_RTCTL register. So every read operation from config space automatically clears CRSSVE flag as it is not defined in PCI_EXP_RTCTL read handler. Fix this by reading current CRSSVE bit flag from emulated space buffer and appending it to PCI_EXP_RTCTL read response. Link: https://lore.kernel.org/r/20211005180952.6812-5-kabel@kernel.org Fixes: 43f5c77bcbd2 ("PCI: aardvark: Fix reporting CRS value") Signed-off-by:Pali Rohár <pali@kernel.org> Signed-off-by:
Marek Behún <kabel@kernel.org> Signed-off-by:
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by:
Marek Behún <kabel@kernel.org> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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