* [PATCH] mvebu : pcie: dt: potential issue in range parsing
@ 2014-01-10 10:23 Jean-Jacques Hiblot
2014-02-05 4:05 ` Jason Cooper
2014-02-05 15:47 ` Thomas Petazzoni
0 siblings, 2 replies; 5+ messages in thread
From: Jean-Jacques Hiblot @ 2014-01-10 10:23 UTC (permalink / raw)
To: linux-arm-kernel
The second parameter of of_read_number is not the index, but a size.
As it happens, in this case it may work just fine because of the the conversion
to u32 and the favorable endianness on this architecture.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
---
drivers/pci/host/pci-mvebu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index c269e43..877e8ce 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -768,7 +768,7 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
for (i = 0; i < nranges; i++) {
u32 flags = of_read_number(range, 1);
- u32 slot = of_read_number(range, 2);
+ u32 slot = of_read_number(range + 1, 1);
u64 cpuaddr = of_read_number(range + na, pna);
unsigned long rtype;
--
1.8.5.2
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH] mvebu : pcie: dt: potential issue in range parsing
2014-01-10 10:23 [PATCH] mvebu : pcie: dt: potential issue in range parsing Jean-Jacques Hiblot
@ 2014-02-05 4:05 ` Jason Cooper
2014-02-05 15:47 ` Thomas Petazzoni
1 sibling, 0 replies; 5+ messages in thread
From: Jason Cooper @ 2014-02-05 4:05 UTC (permalink / raw)
To: linux-arm-kernel
Jean-Jacques,
On Fri, Jan 10, 2014 at 11:23:51AM +0100, Jean-Jacques Hiblot wrote:
> The second parameter of of_read_number is not the index, but a size.
> As it happens, in this case it may work just fine because of the the conversion
> to u32 and the favorable endianness on this architecture.
>
> Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
> ---
> drivers/pci/host/pci-mvebu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Sorry for the unusually long delay. I was waiting for Thomas to get
back from vacation since he is intimately familiar with this driver.
Thomas?
thx,
Jason.
> diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
> index c269e43..877e8ce 100644
> --- a/drivers/pci/host/pci-mvebu.c
> +++ b/drivers/pci/host/pci-mvebu.c
> @@ -768,7 +768,7 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
>
> for (i = 0; i < nranges; i++) {
> u32 flags = of_read_number(range, 1);
> - u32 slot = of_read_number(range, 2);
> + u32 slot = of_read_number(range + 1, 1);
> u64 cpuaddr = of_read_number(range + na, pna);
> unsigned long rtype;
>
> --
> 1.8.5.2
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH] mvebu : pcie: dt: potential issue in range parsing
2014-01-10 10:23 [PATCH] mvebu : pcie: dt: potential issue in range parsing Jean-Jacques Hiblot
2014-02-05 4:05 ` Jason Cooper
@ 2014-02-05 15:47 ` Thomas Petazzoni
2014-02-05 17:21 ` Jason Cooper
1 sibling, 1 reply; 5+ messages in thread
From: Thomas Petazzoni @ 2014-02-05 15:47 UTC (permalink / raw)
To: linux-arm-kernel
Dear Jean-Jacques Hiblot,
On Fri, 10 Jan 2014 11:23:51 +0100, Jean-Jacques Hiblot wrote:
> The second parameter of of_read_number is not the index, but a size.
> As it happens, in this case it may work just fine because of the the conversion
> to u32 and the favorable endianness on this architecture.
>
> Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
> ---
> drivers/pci/host/pci-mvebu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
> index c269e43..877e8ce 100644
> --- a/drivers/pci/host/pci-mvebu.c
> +++ b/drivers/pci/host/pci-mvebu.c
> @@ -768,7 +768,7 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
>
> for (i = 0; i < nranges; i++) {
> u32 flags = of_read_number(range, 1);
> - u32 slot = of_read_number(range, 2);
> + u32 slot = of_read_number(range + 1, 1);
> u64 cpuaddr = of_read_number(range + na, pna);
> unsigned long rtype;
>
Sorry for the long delay, and thanks for the fix!
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(on Armada 370, with PCIe cards plugged in)
Thanks!
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH] mvebu : pcie: dt: potential issue in range parsing
2014-02-05 15:47 ` Thomas Petazzoni
@ 2014-02-05 17:21 ` Jason Cooper
2014-02-14 18:51 ` Bjorn Helgaas
0 siblings, 1 reply; 5+ messages in thread
From: Jason Cooper @ 2014-02-05 17:21 UTC (permalink / raw)
To: linux-arm-kernel
+ Bjorn, linux-pci
Bjorn,
It looks like this didn't get Cc'd to linux-pci. Here's a link:
http://www.spinics.net/lists/arm-kernel/msg299721.html
On Wed, Feb 05, 2014 at 04:47:10PM +0100, Thomas Petazzoni wrote:
> Dear Jean-Jacques Hiblot,
>
> On Fri, 10 Jan 2014 11:23:51 +0100, Jean-Jacques Hiblot wrote:
> > The second parameter of of_read_number is not the index, but a size.
> > As it happens, in this case it may work just fine because of the the conversion
> > to u32 and the favorable endianness on this architecture.
> >
> > Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
> > ---
> > drivers/pci/host/pci-mvebu.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
> > index c269e43..877e8ce 100644
> > --- a/drivers/pci/host/pci-mvebu.c
> > +++ b/drivers/pci/host/pci-mvebu.c
> > @@ -768,7 +768,7 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
> >
> > for (i = 0; i < nranges; i++) {
> > u32 flags = of_read_number(range, 1);
> > - u32 slot = of_read_number(range, 2);
> > + u32 slot = of_read_number(range + 1, 1);
> > u64 cpuaddr = of_read_number(range + na, pna);
> > unsigned long rtype;
> >
>
> Sorry for the long delay, and thanks for the fix!
>
> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
>
> (on Armada 370, with PCIe cards plugged in)
Fixes: 11be65472a427 ("PCI: mvebu: Adapt to the new device tree layout")
Cc: <stable@vger.kernel.org> # v3.12+
Acked-by: Jason Cooper <jason@lakedaemon.net>
thx,
Jason.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH] mvebu : pcie: dt: potential issue in range parsing
2014-02-05 17:21 ` Jason Cooper
@ 2014-02-14 18:51 ` Bjorn Helgaas
0 siblings, 0 replies; 5+ messages in thread
From: Bjorn Helgaas @ 2014-02-14 18:51 UTC (permalink / raw)
To: linux-arm-kernel
On Wed, Feb 05, 2014 at 12:21:07PM -0500, Jason Cooper wrote:
>
> + Bjorn, linux-pci
>
> Bjorn,
>
> It looks like this didn't get Cc'd to linux-pci. Here's a link:
>
> http://www.spinics.net/lists/arm-kernel/msg299721.html
Thanks for the heads-up; I had indeed missed this (I mostly rely on
patchwork, which only tracks linux-pci, and it's not smart enough to
extract quoted patches).
Applied to pci/host-mvebu for v3.15, thanks!
>
> On Wed, Feb 05, 2014 at 04:47:10PM +0100, Thomas Petazzoni wrote:
> > Dear Jean-Jacques Hiblot,
> >
> > On Fri, 10 Jan 2014 11:23:51 +0100, Jean-Jacques Hiblot wrote:
> > > The second parameter of of_read_number is not the index, but a size.
> > > As it happens, in this case it may work just fine because of the the conversion
> > > to u32 and the favorable endianness on this architecture.
> > >
> > > Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
> > > ---
> > > drivers/pci/host/pci-mvebu.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
> > > index c269e43..877e8ce 100644
> > > --- a/drivers/pci/host/pci-mvebu.c
> > > +++ b/drivers/pci/host/pci-mvebu.c
> > > @@ -768,7 +768,7 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
> > >
> > > for (i = 0; i < nranges; i++) {
> > > u32 flags = of_read_number(range, 1);
> > > - u32 slot = of_read_number(range, 2);
> > > + u32 slot = of_read_number(range + 1, 1);
> > > u64 cpuaddr = of_read_number(range + na, pna);
> > > unsigned long rtype;
> > >
> >
> > Sorry for the long delay, and thanks for the fix!
> >
> > Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> > Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> >
> > (on Armada 370, with PCIe cards plugged in)
>
>
> Fixes: 11be65472a427 ("PCI: mvebu: Adapt to the new device tree layout")
> Cc: <stable@vger.kernel.org> # v3.12+
> Acked-by: Jason Cooper <jason@lakedaemon.net>
>
> thx,
>
> Jason.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2014-01-10 10:23 [PATCH] mvebu : pcie: dt: potential issue in range parsing Jean-Jacques Hiblot
2014-02-05 4:05 ` Jason Cooper
2014-02-05 15:47 ` Thomas Petazzoni
2014-02-05 17:21 ` Jason Cooper
2014-02-14 18:51 ` Bjorn Helgaas
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