From: David Miller <davem@xxxxxxxxxxxxx>
Date: Sat, 18 Jun 2016 21:04:21 -0700 (PDT)
> From: Anatoly Pugachev <matorola@xxxxxxxxx>
> Date: Thu, 16 Jun 2016 13:02:07 +0300
>
>> bisected to git commit 63e3027
>
> That's a merge commit that adds 100 different commits, and this happened
> way back in March.
>
> Please find the exact dword access in:
>
> drivers/pci/pcie/portdrv_{core,pci,bus}.c
>
> that triggers this unaligned access so we can debug this further.
Meanwhile I figured it out, this should fix the bug:
diff --git a/drivers/pci/vc.c b/drivers/pci/vc.c
index dfbab61..1fa3a32 100644
--- a/drivers/pci/vc.c
+++ b/drivers/pci/vc.c
@@ -221,9 +221,9 @@ static int pci_vc_do_save_buffer(struct pci_dev *dev, int pos,
else
pci_write_config_word(dev, pos + PCI_VC_PORT_CTRL,
*(u16 *)buf);
- buf += 2;
+ buf += 4;
}
- len += 2;
+ len += 4;
/*
* If we have any Low Priority VCs and a VC Arbitration Table Offset
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