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SubjectRe: [PATCH] sb_edac: Fix detection on SNB machines
On Mon, Feb 09, 2015 at 01:17:17PM +0100, Borislav Petkov wrote:
> From: Borislav Petkov <bp@suse.de>
> Subject: [PATCH] sb_edac: Fix detection on SNB machines
>
> d0585cd815fa ("sb_edac: Claim a different PCI device") changed the
> probing of sb_edac to look for PCI device 0x3ca0:
>
> 3f:0e.0 System peripheral: Intel Corporation Xeon E5/Core i7 Processor Home Agent (rev 07)
> 00: 86 80 a0 3c 00 00 00 00 07 00 80 08 00 00 80 00
> ...
>
> but we're matching for 0x3ca8, i.e. PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA
> in sbridge_probe() therefore the probing fails.
>
> Changing it to probe for 0x3ca0 (PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0),
> .i.e., the 14.0 device, fixes the issue and driver loads successfully
> again:
>
> [ 2449.013120] EDAC DEBUG: sbridge_init:
> [ 2449.017029] EDAC sbridge: Seeking for: PCI ID 8086:3ca0
> [ 2449.022368] EDAC DEBUG: sbridge_get_onedevice: Detected 8086:3ca0
> [ 2449.028498] EDAC sbridge: Seeking for: PCI ID 8086:3ca0
> [ 2449.033768] EDAC sbridge: Seeking for: PCI ID 8086:3ca8
> [ 2449.039028] EDAC DEBUG: sbridge_get_onedevice: Detected 8086:3ca8
> [ 2449.045155] EDAC sbridge: Seeking for: PCI ID 8086:3ca8
> ...
>
> Add a debug printk while at it to be able to catch the failure in the
> future and dump driver version on successful load.
>
> Fixes: d0585cd815fa ("sb_edac: Claim a different PCI device")
> Cc: stable@vger.kernel.org # 3.18
> Cc: Tony Luck <tony.luck@intel.com>
> Cc: Andy Lutomirski <luto@amacapital.net>
> Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
> Signed-off-by: Borislav Petkov <bp@suse.de>
> ---
> drivers/edac/sb_edac.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
> index 63aa6730e89e..1acf57ba4c86 100644
> --- a/drivers/edac/sb_edac.c
> +++ b/drivers/edac/sb_edac.c
> @@ -2447,7 +2447,7 @@ static int sbridge_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> rc = sbridge_get_all_devices(&num_mc, pci_dev_descr_ibridge_table);
> type = IVY_BRIDGE;
> break;
> - case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA:
> + case PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0:
> rc = sbridge_get_all_devices(&num_mc, pci_dev_descr_sbridge_table);
> type = SANDY_BRIDGE;
> break;
> @@ -2460,8 +2460,11 @@ static int sbridge_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> type = BROADWELL;
> break;
> }
> - if (unlikely(rc < 0))
> + if (unlikely(rc < 0)) {
> + edac_dbg(0, "couldn't get all devices for 0x%x\n", pdev->device);
> goto fail0;
> + }
> +
> mc = 0;
>
> list_for_each_entry(sbridge_dev, &sbridge_edac_list, list) {
> @@ -2474,7 +2477,7 @@ static int sbridge_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> goto fail1;
> }
>
> - sbridge_printk(KERN_INFO, "Driver loaded.\n");
> + sbridge_printk(KERN_INFO, "%s\n", SBRIDGE_REVISION);
>
> mutex_unlock(&sbridge_edac_lock);
> return 0;

looks good to me

Acked-by: Aristeu Rozanski <aris@redhat.com>


--
Aristeu



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