netdev - Re: [PATCH net-next V2 13/16] net: fec: print more debug info in fec

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Date:	Fri, 4 Mar 2016 09:05:12 -0700
From:	Troy Kisky <troy.kisky@...ndarydevices.com>
To:	Fugang Duan <fugang.duan@....com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"b38611@...escale.com" <b38611@...escale.com>
Cc:	"fabio.estevam@...escale.com" <fabio.estevam@...escale.com>,
	"l.stach@...gutronix.de" <l.stach@...gutronix.de>,
	"andrew@...n.ch" <andrew@...n.ch>,
	"tremyfr@...il.com" <tremyfr@...il.com>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"laci@...ndarydevices.com" <laci@...ndarydevices.com>,
	"shawnguo@...nel.org" <shawnguo@...nel.org>,
	"johannes@...solutions.net" <johannes@...solutions.net>,
	"stillcompiling@...il.com" <stillcompiling@...il.com>,
	"sergei.shtylyov@...entembedded.com" 
	<sergei.shtylyov@...entembedded.com>,
	"arnd@...db.de" <arnd@...db.de>
Subject: Re: [PATCH net-next V2 13/16] net: fec: print more debug info in
 fec_timeout

On 3/4/2016 3:06 AM, Fugang Duan wrote:
> From: Troy Kisky <troy.kisky@...ndarydevices.com> Sent: Thursday, February 25, 2016 8:37 AM
>> To: netdev@...r.kernel.org; davem@...emloft.net; b38611@...escale.com
>> Cc: fabio.estevam@...escale.com; l.stach@...gutronix.de; andrew@...n.ch;
>> tremyfr@...il.com; linux@....linux.org.uk; linux-arm-
>> kernel@...ts.infradead.org; laci@...ndarydevices.com; shawnguo@...nel.org;
>> johannes@...solutions.net; stillcompiling@...il.com;
>> sergei.shtylyov@...entembedded.com; arnd@...db.de; Troy Kisky
>> <troy.kisky@...ndarydevices.com>
>> Subject: [PATCH net-next V2 13/16] net: fec: print more debug info in
>> fec_timeout
>>
>> Print the current interrupt flags and mask and the interrupt state during the last
>> interrupt in fec_timeout.
>>
>> Signed-off-by: Troy Kisky <troy.kisky@...ndarydevices.com>
>> ---
>>  drivers/net/ethernet/freescale/fec.h      | 1 +
>>  drivers/net/ethernet/freescale/fec_main.c | 4 ++++
>>  2 files changed, 5 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/freescale/fec.h
>> b/drivers/net/ethernet/freescale/fec.h
>> index 001200b..615cca1 100644
>> --- a/drivers/net/ethernet/freescale/fec.h
>> +++ b/drivers/net/ethernet/freescale/fec.h
>> @@ -506,6 +506,7 @@ struct fec_enet_private {
>>  	unsigned int total_tx_ring_size;
>>  	unsigned int total_rx_ring_size;
>>  	uint	events;
>> +	uint	last_ievents;
>>
>>  	struct	platform_device *pdev;
>>
>> diff --git a/drivers/net/ethernet/freescale/fec_main.c
>> b/drivers/net/ethernet/freescale/fec_main.c
>> index afd4060..9a3136b 100644
>> --- a/drivers/net/ethernet/freescale/fec_main.c
>> +++ b/drivers/net/ethernet/freescale/fec_main.c
>> @@ -1107,6 +1107,9 @@ fec_timeout(struct net_device *ndev)
>>  	int i;
>>  	uint events = 0;
>>
>> +	pr_err("%s: last=%x %x, mask %x\n", __func__, fep->last_ievents,
>> +	       readl(fep->hwp + FEC_IEVENT), readl(fep->hwp + FEC_IMASK));
>> +
> pr_err() -> netdev_err()
> 


Sounds good