PCH_CAN - echo_skb is occupied

PCH_CAN - echo_skb is occupied

[JUAN PEDRO RODRIGUEZ NIETO]

I am using a Q7 module with Atom processor and EG20T. I am using the
latest Yocto Dora 10.0.0 to build the embedded linux image. This image
is still using pch_can.c driver, with the "echo_skb is occupied"
problem.

I have checked with your post
http://marc.info/?l=linux-can&m=137180949810229&w=2
and the source code of pch_can does not have your patch applied.

I am not familiar with kernel patching. Could you please direct me
where can I find the latest pch_can and how to download your patch in
patch file format so I can apply it to my poky build?

Is there any plan to release these patches in the master branch?

Thanks,

Juan Pedro Rodríguez Nieto
Delegación de Sistemas




Rambla Solanes, 29-31
08940 Cornellà de Llobregat, Barcelona
Tel.: 934 139 200
Fax: 934 139 201

Re: PCH_CAN - echo_skb is occupied

[Wolfgang Grandegger]

On 03/31/2014 11:59 AM, JUAN PEDRO RODRIGUEZ NIETO wrote:
> I am using a Q7 module with Atom processor and EG20T. I am using the
> latest Yocto Dora 10.0.0 to build the embedded linux image. This image
> is still using pch_can.c driver, with the "echo_skb is occupied"
> problem.
> 
> I have checked with your post
> http://marc.info/?l=linux-can&m=137180949810229&w=2
> and the source code of pch_can does not have your patch applied.
> 
> I am not familiar with kernel patching. Could you please direct me
> where can I find the latest pch_can and how to download your patch in
> patch file format so I can apply it to my poky build?
> 
> Is there any plan to release these patches in the master branch?

The EG20T does have a C_CAN core and therefore we would like to switch
to the more advanced C_CAN driver (and get rid of the pch_can driver
sooner than later). It also has less known issues. Last year I posted a
PCH PCI interface driver for the EG20T but it did not make it into
mainline yet. The problem is that I don't have any C_CAN hardware at
hand to validate the patches myself. I'm going to dig the patches out,
end of the week, also for the pch_can.

BTW, what kernel version are you using? Any chance to switch to a recent
mainline kernel?

Wolfgang.

Re: PCH_CAN - echo_skb is occupied

[JUAN PEDRO RODRIGUEZ NIETO]

Hello,

I am using Linux 3.10.11-yocto-standard kernel compiled using poky-dora-10.0.1

I didn't know about the C_CAN driver. What is the status of the C_CAN driver?
I have found that in Kernel configuration/Networking support/CAN bus
subsystem support/CAN device drivers there is a Generic PCI bus based
C_CAN/D_CAN driver. I will try it.

Thanks,
Juan Pedro Rodríguez Nieto
Delegación de Sistemas




Rambla Solanes, 29-31
08940 Cornellà de Llobregat, Barcelona
Tel.: 934 139 200
Fax: 934 139 201


2014-04-01 21:29 GMT+02:00 Wolfgang Grandegger <wg@grandegger.com>:
> On 03/31/2014 11:59 AM, JUAN PEDRO RODRIGUEZ NIETO wrote:
>> I am using a Q7 module with Atom processor and EG20T. I am using the
>> latest Yocto Dora 10.0.0 to build the embedded linux image. This image
>> is still using pch_can.c driver, with the "echo_skb is occupied"
>> problem.
>>
>> I have checked with your post
>> http://marc.info/?l=linux-can&m=137180949810229&w=2
>> and the source code of pch_can does not have your patch applied.
>>
>> I am not familiar with kernel patching. Could you please direct me
>> where can I find the latest pch_can and how to download your patch in
>> patch file format so I can apply it to my poky build?
>>
>> Is there any plan to release these patches in the master branch?
>
> The EG20T does have a C_CAN core and therefore we would like to switch
> to the more advanced C_CAN driver (and get rid of the pch_can driver
> sooner than later). It also has less known issues. Last year I posted a
> PCH PCI interface driver for the EG20T but it did not make it into
> mainline yet. The problem is that I don't have any C_CAN hardware at
> hand to validate the patches myself. I'm going to dig the patches out,
> end of the week, also for the pch_can.
>
> BTW, what kernel version are you using? Any chance to switch to a recent
> mainline kernel?
>
> Wolfgang.

Re: PCH_CAN - echo_skb is occupied

[Wolfgang Grandegger]

On Wed, 2 Apr 2014 10:35:24 +0200, JUAN PEDRO RODRIGUEZ NIETO
<jprodriguez@elecnor.com> wrote:
> Hello,
> 
> I am using Linux 3.10.11-yocto-standard kernel compiled using
> poky-dora-10.0.1
> 
> I didn't know about the C_CAN driver. What is the status of the C_CAN
> driver?
> I have found that in Kernel configuration/Networking support/CAN bus
> subsystem support/CAN device drivers there is a Generic PCI bus based
> C_CAN/D_CAN driver. I will try it.

Yes, but it needs to be extended for the PCH_CAN. Things like PCI device
and vendor ID, appropriate register access functions, reset handling,
etc. I'm going to send a patch later today or tomorrow.

Wolfgang.