diff mbox

[v2,2/7] PCI: aardvark: set PIO_ADDR_LS correctly in advk_pcie_rd_conf()

Message ID 20170928125838.11887-3-thomas.petazzoni@free-electrons.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Thomas Petazzoni Sept. 28, 2017, 12:58 p.m. UTC
From: Victor Gu <xigu@marvell.com>

When setting the PIO_ADDR_LS register during a configuration read, we
were properly passing the device number, function number and register
number, but not the bus number, causing issues when reading the
configuration of PCIe devices.

Fixes: 8c39d710363c1 ("PCI: aardvark: Add Aardvark PCI host controller driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Victor Gu <xigu@marvell.com>
Reviewed-by: Wilson Ding <dingwei@marvell.com>
Reviewed-by: Nadav Haklai <nadavh@marvell.com>
[Thomas: tweak commit log.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 drivers/pci/host/pci-aardvark.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Bjorn Helgaas Oct. 5, 2017, 5:25 p.m. UTC | #1
On Thu, Sep 28, 2017 at 02:58:33PM +0200, Thomas Petazzoni wrote:
> From: Victor Gu <xigu@marvell.com>
> 
> When setting the PIO_ADDR_LS register during a configuration read, we
> were properly passing the device number, function number and register
> number, but not the bus number, causing issues when reading the
> configuration of PCIe devices.
> 
> Fixes: 8c39d710363c1 ("PCI: aardvark: Add Aardvark PCI host controller driver")
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Victor Gu <xigu@marvell.com>
> Reviewed-by: Wilson Ding <dingwei@marvell.com>
> Reviewed-by: Nadav Haklai <nadavh@marvell.com>
> [Thomas: tweak commit log.]
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> ---
>  drivers/pci/host/pci-aardvark.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c
> index da2881ba7737..af7a9c4a61a4 100644
> --- a/drivers/pci/host/pci-aardvark.c
> +++ b/drivers/pci/host/pci-aardvark.c
> @@ -459,7 +459,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
>  	advk_writel(pcie, reg, PIO_CTRL);
>  
>  	/* Program the address registers */
> -	reg = PCIE_BDF(devfn) | PCIE_CONF_REG(where);
> +	reg = PCIE_CONF_ADDR(bus->number, devfn, where);

I think PCIE_BDF() is now unused and should be removed.

>  	advk_writel(pcie, reg, PIO_ADDR_LS);
>  	advk_writel(pcie, 0, PIO_ADDR_MS);
>  
> -- 
> 2.13.5
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
Thomas Petazzoni Jan. 9, 2018, 4:10 p.m. UTC | #2
Hello,

On Thu, 5 Oct 2017 12:25:45 -0500, Bjorn Helgaas wrote:

> > diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c
> > index da2881ba7737..af7a9c4a61a4 100644
> > --- a/drivers/pci/host/pci-aardvark.c
> > +++ b/drivers/pci/host/pci-aardvark.c
> > @@ -459,7 +459,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
> >  	advk_writel(pcie, reg, PIO_CTRL);
> >  
> >  	/* Program the address registers */
> > -	reg = PCIE_BDF(devfn) | PCIE_CONF_REG(where);
> > +	reg = PCIE_CONF_ADDR(bus->number, devfn, where);  
> 
> I think PCIE_BDF() is now unused and should be removed.

True, I'll fix this in v3.

Thanks!

Thomas
diff mbox

Patch

diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c
index da2881ba7737..af7a9c4a61a4 100644
--- a/drivers/pci/host/pci-aardvark.c
+++ b/drivers/pci/host/pci-aardvark.c
@@ -459,7 +459,7 @@  static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
 	advk_writel(pcie, reg, PIO_CTRL);
 
 	/* Program the address registers */
-	reg = PCIE_BDF(devfn) | PCIE_CONF_REG(where);
+	reg = PCIE_CONF_ADDR(bus->number, devfn, where);
 	advk_writel(pcie, reg, PIO_ADDR_LS);
 	advk_writel(pcie, 0, PIO_ADDR_MS);