linux-kernel - Re: bug in drivers/edac/edac_core.h pci_write

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Date:	Sun, 5 Apr 2009 21:46:19 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Jeff Haran" <jharan@...cade.COM>
Cc:	<linux-kernel@...r.kernel.org>, Doug Thompson <norsk5@...oo.com>
Subject: Re: bug in drivers/edac/edac_core.h pci_write_bits32()

(cc maintainer)

On Thu, 26 Mar 2009 16:54:01 -0700 "Jeff Haran" <jharan@...cade.COM> wrote:

> 2.6.29 and previous versions seem to contain this bug which I found just
> eyeballing the code:
> 
> static inline void pci_write_bits32(struct pci_dev *pdev, int offset,
>                     u32 value, u32 mask)
> {
>     if (mask != 0xffff) {
>         u32 buf;
> 
>         pci_read_config_dword(pdev, offset, &buf);
>         value &= mask;
>         buf &= ~mask;
>         value |= buf;
>     }
> 
>     pci_write_config_dword(pdev, offset, value);
> }
> 
> I'm pretty sure that "if" statement should be:
> 
> 	if (mask != 0xffffffff) {
> 
> Please copy my email address in any response as I do not subscribe.
> 
> Thanks,

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