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EDAC, sb_edac: Fix TAD presence check for sbridge_mci_bind_devs() 

In commit

  7d375bffa5 ("sb_edac: Fix support for systems with two home agents per socket")

NUM_CHANNELS was changed to 8 and the channel space was renumerated to
handle EN, EP, and EX configurations.

The *_mci_bind_devs() functions - except for sbridge_mci_bind_devs() -
got a new device presence check in the form of saw_chan_mask. However,
sbridge_mci_bind_devs() still uses the NUM_CHANNELS for loop.

With the increase in NUM_CHANNELS, this loop fails at index 4 since
SB only has 4 TADs.  This results in the following error on SB machines:

  EDAC sbridge: Some needed devices are missing
  EDAC sbridge: Couldn't find mci handler
  EDAC sbridge: Couldn't find mci handle

This patch adapts the saw_chan_mask logic for sbridge_mci_bind_devs() as
well.

After this patch:

  EDAC MC0: Giving out device to module sbridge_edac.c controller Sandy Bridge Socket#0: DEV 0000:3f:0e.0 (POLLED)
  EDAC MC1: Giving out device to module sbridge_edac.c controller Sandy Bridge Socket#1: DEV 0000:7f:0e.0 (POLLED)

Signed-off-by: Seth Jennings <sjenning@redhat.com>
Acked-by: Aristeu Rozanski <aris@redhat.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Tested-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org> # v4.2
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1438798561-10180-1-git-send-email-sjenning@redhat.com
Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Seth Jennings 2015-08-05 13:16:01 -05:00 committed by Borislav Petkov
parent 58a9c251c9
commit 2900ea6096
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/edac/sb_edac.c
View File

@ -1688,6 +1688,7 @@ static int sbridge_mci_bind_devs(struct mem_ctl_info *mci,
{
struct sbridge_pvt *pvt = mci->pvt_info;
struct pci_dev *pdev;
u8 saw_chan_mask = 0;
int i;
for (i = 0; i < sbridge_dev->n_devs; i++) {
@ -1721,6 +1722,7 @@ static int sbridge_mci_bind_devs(struct mem_ctl_info *mci,
{
int id = pdev->device - PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TAD0;
pvt->pci_tad[id] = pdev;
saw_chan_mask |= 1 << id;
}
break;
case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_DDRIO:
@ -1741,10 +1743,8 @@ static int sbridge_mci_bind_devs(struct mem_ctl_info *mci,
!pvt-> pci_tad || !pvt->pci_ras || !pvt->pci_ta)
goto enodev;
for (i = 0; i < NUM_CHANNELS; i++) {
if (!pvt->pci_tad[i])
goto enodev;
}
if (saw_chan_mask != 0x0f)
goto enodev;
return 0;
enodev: