Commits
Qiuxu Zhuo committed bfd4473b850
i2c: i801: Restore the presence state of P2SB PCI device after reading BAR Sun, Yunying reported the following failure on Denverton micro-server: EDAC DEBUG: pnd2_init: EDAC DEBUG: pnd2_probe: EDAC DEBUG: dnv_rd_reg: Read b_cr_tolud_pci=00000000_80000000 EDAC DEBUG: dnv_rd_reg: Read b_cr_touud_lo_pci=00000000_80000000 EDAC DEBUG: dnv_rd_reg: Read b_cr_touud_hi_pci=00000000_00000004 EDAC DEBUG: dnv_rd_reg: Read b_cr_asym_mem_region0_mchbar=00000000_00000000 EDAC DEBUG: dnv_rd_reg: Read b_cr_asym_mem_region1_mchbar=00000000_00000000 EDAC DEBUG: dnv_rd_reg: Read b_cr_mot_out_base_mchbar=00000000_00000000 EDAC DEBUG: dnv_rd_reg: Read b_cr_mot_out_mask_mchbar=00000000_00000000 EDAC pnd2: Failed to register device with error -19. On Denverton micro-server, the presence of the P2SB bridge PCI device is enabled or disabled by the item 'RelaxSecConf' in BIOS setup menu. When 'RelaxSecConf' is enabled, the P2SB PCI device is present and the pnd2_edac EDAC driver also uses it to get BAR. Hiding the P2SB PCI device caused the pnd2_edac EDAC driver failed to get BAR then reported the above failure. Therefor, store the presence state of P2SB PCI device before unhiding it for reading BAR and restore the presence state after reading BAR. Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Reported-by: Yunying Sun <yunying.sun@intel.com> Tested-by: Yunying Sun <yunying.sun@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>