* [PATCH] nvidiafb: fix unreachable code in nv10GetConfig
@ 2006-11-08 19:55 Nathan Lynch
2006-11-08 20:13 ` Andrew Morton
0 siblings, 1 reply; 4+ messages in thread
From: Nathan Lynch @ 2006-11-08 19:55 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-kernel, linux-fbdev-devel
Fix binary/logical operator typo which leads to unreachable code.
Noticed while looking at other issues; I don't have the relevant
hardware to test this.
Signed-off-by: Nathan Lynch <ntl@pobox.com>
--- linux-2.6-powerpc.git.orig/drivers/video/nvidia/nv_setup.c
+++ linux-2.6-powerpc.git/drivers/video/nvidia/nv_setup.c
@@ -262,7 +262,7 @@ static void nv10GetConfig(struct nvidia_
#endif
dev = pci_find_slot(0, 1);
- if ((par->Chipset && 0xffff) == 0x01a0) {
+ if ((par->Chipset & 0xffff) == 0x01a0) {
int amt = 0;
pci_read_config_dword(dev, 0x7c, &amt);
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] nvidiafb: fix unreachable code in nv10GetConfig
2006-11-08 19:55 [PATCH] nvidiafb: fix unreachable code in nv10GetConfig Nathan Lynch
@ 2006-11-08 20:13 ` Andrew Morton
2006-11-08 22:04 ` Nathan Lynch
0 siblings, 1 reply; 4+ messages in thread
From: Andrew Morton @ 2006-11-08 20:13 UTC (permalink / raw)
To: Nathan Lynch; +Cc: linux-fbdev-devel, linux-kernel
On Wed, 8 Nov 2006 13:55:11 -0600
Nathan Lynch <ntl@pobox.com> wrote:
> Fix binary/logical operator typo which leads to unreachable code.
> Noticed while looking at other issues; I don't have the relevant
> hardware to test this.
>
>
> Signed-off-by: Nathan Lynch <ntl@pobox.com>
>
> --- linux-2.6-powerpc.git.orig/drivers/video/nvidia/nv_setup.c
> +++ linux-2.6-powerpc.git/drivers/video/nvidia/nv_setup.c
> @@ -262,7 +262,7 @@ static void nv10GetConfig(struct nvidia_
> #endif
>
> dev = pci_find_slot(0, 1);
> - if ((par->Chipset && 0xffff) == 0x01a0) {
> + if ((par->Chipset & 0xffff) == 0x01a0) {
> int amt = 0;
>
> pci_read_config_dword(dev, 0x7c, &amt);
That looks like a pretty significant bug. It'll cause the kernel to
potentially map the wrong amount of memory for all cards except the
NV_ARCH_04 type. Has been there for over a year though. hmm..
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] nvidiafb: fix unreachable code in nv10GetConfig
2006-11-08 20:13 ` Andrew Morton
@ 2006-11-08 22:04 ` Nathan Lynch
2006-11-12 22:20 ` James Simmons
0 siblings, 1 reply; 4+ messages in thread
From: Nathan Lynch @ 2006-11-08 22:04 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-kernel, linux-fbdev-devel
Andrew Morton wrote:
> On Wed, 8 Nov 2006 13:55:11 -0600
> Nathan Lynch <ntl@pobox.com> wrote:
>
> > Fix binary/logical operator typo which leads to unreachable code.
> > Noticed while looking at other issues; I don't have the relevant
> > hardware to test this.
> >
> >
> > Signed-off-by: Nathan Lynch <ntl@pobox.com>
> >
> > --- linux-2.6-powerpc.git.orig/drivers/video/nvidia/nv_setup.c
> > +++ linux-2.6-powerpc.git/drivers/video/nvidia/nv_setup.c
> > @@ -262,7 +262,7 @@ static void nv10GetConfig(struct nvidia_
> > #endif
> >
> > dev = pci_find_slot(0, 1);
> > - if ((par->Chipset && 0xffff) == 0x01a0) {
> > + if ((par->Chipset & 0xffff) == 0x01a0) {
> > int amt = 0;
> >
> > pci_read_config_dword(dev, 0x7c, &amt);
>
> That looks like a pretty significant bug. It'll cause the kernel to
> potentially map the wrong amount of memory for all cards except the
> NV_ARCH_04 type. Has been there for over a year though. hmm..
Did some searching, and assuming that chipset == PCI device id
(dubious?), I think the bug would affect only some integrated GeForce2
cards, which are somewhat old.
It looks to me like the other devices handled by nv10GetConfig would
still be handled as intended, but I'm not familiar with this code.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] nvidiafb: fix unreachable code in nv10GetConfig
2006-11-08 22:04 ` Nathan Lynch
@ 2006-11-12 22:20 ` James Simmons
0 siblings, 0 replies; 4+ messages in thread
From: James Simmons @ 2006-11-12 22:20 UTC (permalink / raw)
To: Nathan Lynch; +Cc: Andrew Morton, linux-fbdev-devel, linux-kernel
> Andrew Morton wrote:
>> On Wed, 8 Nov 2006 13:55:11 -0600
>> Nathan Lynch <ntl@pobox.com> wrote:
>>
>>> Fix binary/logical operator typo which leads to unreachable code.
>>> Noticed while looking at other issues; I don't have the relevant
>>> hardware to test this.
>>>
>>>
>>> Signed-off-by: Nathan Lynch <ntl@pobox.com>
>>>
>>> --- linux-2.6-powerpc.git.orig/drivers/video/nvidia/nv_setup.c
>>> +++ linux-2.6-powerpc.git/drivers/video/nvidia/nv_setup.c
>>> @@ -262,7 +262,7 @@ static void nv10GetConfig(struct nvidia_
>>> #endif
>>>
>>> dev = pci_find_slot(0, 1);
>>> - if ((par->Chipset && 0xffff) == 0x01a0) {
>>> + if ((par->Chipset & 0xffff) == 0x01a0) {
>>> int amt = 0;
>>>
>>> pci_read_config_dword(dev, 0x7c, &amt);
>>
>> That looks like a pretty significant bug. It'll cause the kernel to
>> potentially map the wrong amount of memory for all cards except the
>> NV_ARCH_04 type. Has been there for over a year though. hmm..
>
> Did some searching, and assuming that chipset == PCI device id
> (dubious?), I think the bug would affect only some integrated GeForce2
> cards, which are somewhat old.
>
> It looks to me like the other devices handled by nv10GetConfig would
> still be handled as intended, but I'm not familiar with this code.
>
Your assumption is correct :-)
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2006-11-12 22:21 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2006-11-08 19:55 [PATCH] nvidiafb: fix unreachable code in nv10GetConfig Nathan Lynch
2006-11-08 20:13 ` Andrew Morton
2006-11-08 22:04 ` Nathan Lynch
2006-11-12 22:20 ` James Simmons
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