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EDAC, pnd2: Mask off the lower four bits of a BAR 

Bit[0] of BAR is always zero. Bit[2:1] and bit[3] of BAR contain the
information of 'type' and the 'prefetchable' accordingly. Therefore,
mask the lower four bits to retrieve the actual base address of a BAR.

Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170814154813.21619-1-qiuxu.zhuo@intel.com
Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Qiuxu Zhuo 2017-08-14 23:48:13 +08:00 committed by Borislav Petkov
parent 3eaef0fa39
commit d84676a9e1
1 changed files with 1 additions and 0 deletions
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drivers/edac/pnd2_edac.c
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@ -241,6 +241,7 @@ static u64 get_sideband_reg_base_addr(void)
if (pdev) {
pci_read_config_dword(pdev, 0x10, &lo);
pci_read_config_dword(pdev, 0x14, &hi);
lo &= 0xfffffff0;
pci_dev_put(pdev);
return (U64_LSHIFT(hi, 32) | U64_LSHIFT(lo, 0));
} else {