Broken IRQ handling for S3C2416

Broken IRQ handling for S3C2416

[José Miguel Gonçalves]

Hi,

While migrating from kernel 3.8 to kernel 3.9 I've detected a problem on my 
S3C2416 based board. I'm using UART 3 as console and with kernel 3.9 I'm unable to 
have a getty working on that port and see a lot of these on dmesg:

samsung-uart s3c2440-uart.3: cannot get irq 94

Also WDT is not correctly initialized in 3.8, I see in dmesg:

s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq disabled

while in 3.9 I see:

s3c2410-wdt s3c2410-wdt: tmr_margin value out of range, default 15 used
s3c2410-wdt s3c2410-wdt: failed to install irq (-38)
s3c2410-wdt: probe of s3c2410-wdt failed with error -38

So I guess something is broken in 3.9 kernel's IRQ handling for S3C2416.

Best regards,
José Gonçalves

Re: Broken IRQ handling for S3C2416

[Heiko Stübner]

Hi Jose,

Am Donnerstag, 27. Juni 2013, 13:59:07 schrieb José Miguel Gonçalves:
> Hi,
> 
> While migrating from kernel 3.8 to kernel 3.9 I've detected a problem on my
> S3C2416 based board. I'm using UART 3 as console and with kernel 3.9 I'm
> unable to have a getty working on that port and see a lot of these on
> dmesg:
> 
> samsung-uart s3c2440-uart.3: cannot get irq 94
> 
> Also WDT is not correctly initialized in 3.8, I see in dmesg:
> 
> s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq disabled
> 
> while in 3.9 I see:
> 
> s3c2410-wdt s3c2410-wdt: tmr_margin value out of range, default 15 used
> s3c2410-wdt s3c2410-wdt: failed to install irq (-38)
> s3c2410-wdt: probe of s3c2410-wdt failed with error -38
> 
> So I guess something is broken in 3.9 kernel's IRQ handling for S3C2416.

when I checked two days ago, the irqs where working fine on my s3c2416 board.

Basic questions, did you change the init_irq callback to the correct new 
function (s3c2416_init_irq) in your board file, can you provide a more 
complete log and of course and is your board-file available somewhere?


Thanks
Heiko

Re: Broken IRQ handling for S3C2416

[José Miguel Gonçalves]

Hi Heiko,

On 27-06-2013 15:26, Heiko Stübner wrote:
> Hi Jose,
>
> Am Donnerstag, 27. Juni 2013, 13:59:07 schrieb José Miguel Gonçalves:
>> Hi,
>>
>> While migrating from kernel 3.8 to kernel 3.9 I've detected a problem on my
>> S3C2416 based board. I'm using UART 3 as console and with kernel 3.9 I'm
>> unable to have a getty working on that port and see a lot of these on
>> dmesg:
>>
>> samsung-uart s3c2440-uart.3: cannot get irq 94
>>
>> Also WDT is not correctly initialized in 3.8, I see in dmesg:
>>
>> s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq disabled
>>
>> while in 3.9 I see:
>>
>> s3c2410-wdt s3c2410-wdt: tmr_margin value out of range, default 15 used
>> s3c2410-wdt s3c2410-wdt: failed to install irq (-38)
>> s3c2410-wdt: probe of s3c2410-wdt failed with error -38
>>
>> So I guess something is broken in 3.9 kernel's IRQ handling for S3C2416.
> when I checked two days ago, the irqs where working fine on my s3c2416 board.
>
> Basic questions, did you change the init_irq callback to the correct new
> function (s3c2416_init_irq) in your board file, can you provide a more
> complete log and of course and is your board-file available somewhere?
>

My bad! I missed that change on the init_irq callback. Everything is working fine now.
Thank you and sorry for the inconvenience.

Best regards,
José Gonçalves

Re: Broken IRQ handling for S3C2416

[Heiko Stübner]

Am Donnerstag, 27. Juni 2013, 16:48:16 schrieb José Miguel Gonçalves:
> Hi Heiko,
> 
> On 27-06-2013 15:26, Heiko Stübner wrote:
> > Hi Jose,
> > 
> > Am Donnerstag, 27. Juni 2013, 13:59:07 schrieb José Miguel Gonçalves:
> >> Hi,
> >> 
> >> While migrating from kernel 3.8 to kernel 3.9 I've detected a problem on
> >> my S3C2416 based board. I'm using UART 3 as console and with kernel 3.9
> >> I'm unable to have a getty working on that port and see a lot of these
> >> on dmesg:
> >> 
> >> samsung-uart s3c2440-uart.3: cannot get irq 94
> >> 
> >> Also WDT is not correctly initialized in 3.8, I see in dmesg:
> >> 
> >> s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq disabled
> >> 
> >> while in 3.9 I see:
> >> 
> >> s3c2410-wdt s3c2410-wdt: tmr_margin value out of range, default 15 used
> >> s3c2410-wdt s3c2410-wdt: failed to install irq (-38)
> >> s3c2410-wdt: probe of s3c2410-wdt failed with error -38
> >> 
> >> So I guess something is broken in 3.9 kernel's IRQ handling for S3C2416.
> > 
> > when I checked two days ago, the irqs where working fine on my s3c2416
> > board.
> > 
> > Basic questions, did you change the init_irq callback to the correct new
> > function (s3c2416_init_irq) in your board file, can you provide a more
> > complete log and of course and is your board-file available somewhere?
> 
> My bad! I missed that change on the init_irq callback. Everything is
> working fine now. Thank you and sorry for the inconvenience.

no problem, glad I could help :-)


Heiko