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

[Gala Kumar-B11780]

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() ??

- k