From: Qiuxu Zhuo <qiuxu.zhuo@intel.com>

Date: Mon, 14 Aug 2017 23:48:13 +0800

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

Patch-mainline: v4.14-rc1

Git-commit: d84676a9e12817c8435e836911800bdcc67928a0

References: bsc#1056989

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>

---

 drivers/edac/pnd2_edac.c | 1 +

 1 file changed, 1 insertion(+)

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 {