Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: 46b4606ba23498d3d0e66b53e498eb3d5d592586
https://github.com/tianocore/edk2/commit/46b4606ba23498d3d0e66b53e498eb3d5d592586
Author: xueshengfeng <xueshengf...@byosoft.com.cn>
Date: 2021-09-26 (Sun, 26 Sep 2021)
Changed paths:
M MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
Log Message:
-----------
MdeModulePkg/PciBusDxe: Improve the flow of testing support attributes
https://bugzilla.tianocore.org/show_bug.cgi?id=3635
Currently, in order to test the supported attributes,
the PciTestSupportedAttribute() will set the command register
to 0x27 (EFI_PCI_COMMAND_IO_SPACE, EFI_PCI_COMMAND_MEMORY_SPACE,
EFI_PCI_COMMAND_BUS_MASTER, EFI_PCI_COMMAND_VGA_PALETTE_SNOOP) firstly,
and then read back to check whether these attributes are
set successfully in the device.
This will cause the other enabled bits
(other than EFI_PCI_COMMAND_IO_SPACE,EFI_PCI_COMMAND_MEMORY_SPACE,
EFI_PCI_COMMAND_BUS_MASTER,EFI_PCI_COMMAND_VGA_PALETTE_SNOOP)
be cleared for a short of time
This patch fixes this issue by keeping the origina
enabled bits when setting 0x27.
Signed-off-by: xueshengfeng <xueshengf...@byosoft.com.cn>
Reviewed-by: Ray <ray...@intel.com>
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