[PATCH 3/3] edac/85xx: Enable the EDAC PCI err driver by device_initcall

[Scott Wood]

On 09/27/2012 04:45:08 PM, Gala Kumar-B11780 wrote:
> 
> On Sep 27, 2012, at 11:09 AM, Scott Wood wrote:
> 
> > On 09/27/2012 02:02:03 PM, Chunhe Lan wrote:
> >> Original process of call:
> >> 	The mpc85xx_pci_err_probe function completes to been registered
> >> 	and enabled of EDAC PCI err driver at the latter time stage of
> >> 	kernel boot in the mpc85xx_edac.c.
> >> Current process of call:
> >> 	The mpc85xx_pci_err_probe function completes to been registered
> >> 	and enabled of EDAC PCI err driver at the first	time stage of
> >> 	kernel boot in the fsl_pci.c.
> >> So in this case the following error messages appear in the boot  
> log:
> >>    PCI: Probing PCI hardware
> >>    pci 0000:00:00.0: ignoring class b20 (doesn't match header type  
> 01)
> >>    PCIE error(s) detected
> >>    PCIE ERR_DR register: 0x00020000
> >>    PCIE ERR_CAP_STAT register: 0x80000001
> >>    PCIE ERR_CAP_R0 register: 0x00000800
> >>    PCIE ERR_CAP_R1 register: 0x00000000
> >>    PCIE ERR_CAP_R2 register: 0x00000000
> >>    PCIE ERR_CAP_R3 register: 0x00000000
> >> Because the EDAC PCI err driver is registered and enabled earlier  
> than
> >> original point of call. But at this point of time, PCI hardware is  
> not
> >> probed and initialized, and it is in unknowable state.
> >> So, move enable function into mpc85xx_pci_err_en which is called  
> at the
> >> middle time stage of kernel boot and after PCI hardware is probed  
> and
> >> initialized by device_initcall in the fsl_pci.c.
> >> Signed-off-by: Chunhe Lan <Chunhe.Lan at freescale.com>
> >> ---
> >> arch/powerpc/sysdev/fsl_pci.c |   12 ++++++++++
> >> arch/powerpc/sysdev/fsl_pci.h |    5 ++++
> >> drivers/edac/mpc85xx_edac.c   |   47  
> ++++++++++++++++++++++++++++------------
> >> 3 files changed, 50 insertions(+), 14 deletions(-)
> >> diff --git a/arch/powerpc/sysdev/fsl_pci.c  
> b/arch/powerpc/sysdev/fsl_pci.c
> >> index 3d6f4d8..a591965 100644
> >> --- a/arch/powerpc/sysdev/fsl_pci.c
> >> +++ b/arch/powerpc/sysdev/fsl_pci.c
> >> @@ -904,4 +904,16 @@ static int __init fsl_pci_init(void)
> >> 	return platform_driver_register(&fsl_pci_driver);
> >> }
> >> arch_initcall(fsl_pci_init);
> >> +
> >> +static int __init fsl_pci_err_en(void)
> >> +{
> >> +	struct device_node *np;
> >> +
> >> +	for_each_node_by_type(np, "pci")
> >> +		if (of_match_node(pci_ids, np))
> >> +			mpc85xx_pci_err_en(np);
> >> +
> >> +	return 0;
> >> +}
> >> +device_initcall(fsl_pci_err_en);
> >
> > Why can't you call this from the normal PCIe controller init,  
> instead of searching for the node independently?
> 
> Don't we have this now with mpc85xx_pci_err_probe() ??

What do you mean by "this"?

-Scott