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| author | Qiuxu Zhuo <qiuxu.zhuo@intel.com> | 2017-08-14 23:48:13 +0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2017-08-19 10:33:30 +0200 |
| commit | d84676a9e12817c8435e836911800bdcc67928a0 (patch) | |
| tree | eb0bcc349837dcac5486c54d9b749af6de6a162c /drivers/edac | |
| parent | 3eaef0fa39f7badb0bf25bb28ab96cf06b29d45c (diff) | |
| download | linux-d84676a9e12817c8435e836911800bdcc67928a0.tar.gz | |
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>
Diffstat (limited to 'drivers/edac')
| -rw-r--r-- | drivers/edac/pnd2_edac.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c index a3180a87ff96..2b16b95201eb 100644 --- a/drivers/edac/pnd2_edac.c +++ b/drivers/edac/pnd2_edac.c @@ -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 { |