linux-kernel - Re: [PATCH] mfd: sun4i-gpadc: adaptation interrupt number

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Message-ID: <3201556.5fSG56mABF@jernej-laptop>
Date: Tue, 09 Jan 2024 21:19:48 +0100
From: Jernej Škrabec <jernej.skrabec@...il.com>
To: Lee Jones <lee@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
 Jernej Skrabec <jernej.skrabec@...il.com>,
 Samuel Holland <samuel@...lland.org>, linux-arm-kernel@...ts.infradead.org,
 linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
 Andre Przywara <andre.przywara@....com>,
 Jianzhang Mai <maijianzhang@...winnertech.com>
Subject: Re: [PATCH] mfd: sun4i-gpadc: adaptation interrupt number

Dne sreda, 27. december 2023 ob 03:01:17 CET je Fuyao Kashizuku napisal(a):
> The identifiers are used as IRQ resource numbers, where 0 is treated
> specially.
> 
> This fixes sun4i-gpadc-iio probe failed when request irq.
> 
> The backstack:
> 	WARNING: CPU: 3 PID: 1 at drivers/base/platform.c:451
> 	__platform_get_irq_byname+0xb8/0xc4
> 	0 is an invalid IRQ number
> 	Modules linked in:
> 	CPU: 3 PID: 1 Comm: swapper/0 Not tainted 6.7.0-rc6 #9
> 	Hardware name: Allwinner sun8i Family
> 	 unwind_backtrace
> 	 show_stack
> 	 dump_stack_lvl
> 	 __warn
> 	 warn_slowpath_fmt
> 	 __platform_get_irq_byname
> 	 platform_get_irq_byname
> 	 sun4i_irq_init
> 	 sun4i_gpadc_probe
> 	 platform_probe
> 	 really_probe
> 	 __driver_probe_device
> 	 driver_probe_device
> 	 __driver_attach
> 	 bus_for_each_dev
> 	 bus_add_driver
> 	 driver_register
> 	 do_one_initcall
> 	 do_initcall_level
> 	 do_initcalls
> 	 kernel_init_freeable
> 	 kernel_init
> 
> Log reports:
> sun4i-gpadc-iio sun6i-a31-gpadc-iio.0: error -EINVAL: IRQ FIFO_DATA_PENDING
> not found
> sun4i-gpadc-iio: probe of sun6i-a31-gpadc-iio.0 failed with error -22
> 
> Signed-off-by: Fuyao Kashizuku <fuyao@...erm.com>

Acked-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej

> ---
> Changes in v2:
>  - Fix the commit message.
>  - Add the backstack.
>  - Add the log reports.
>  - Use the correct full name and email address.
>  - Correct the subsystem to mfd.
>  - Link to v1: https://lore.kernel.org/lkml/YwdhTlk+9h+9Mrwm@scg/
> 
>  include/linux/mfd/sun4i-gpadc.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/mfd/sun4i-gpadc.h b/include/linux/mfd/sun4i-gpadc.h
> index ea0ccf33a459..021f820f9d52 100644
> --- a/include/linux/mfd/sun4i-gpadc.h
> +++ b/include/linux/mfd/sun4i-gpadc.h
> @@ -81,8 +81,8 @@
>  #define SUN4I_GPADC_TEMP_DATA				0x20
>  #define SUN4I_GPADC_DATA				0x24
>  
> -#define SUN4I_GPADC_IRQ_FIFO_DATA			0
> -#define SUN4I_GPADC_IRQ_TEMP_DATA			1
> +#define SUN4I_GPADC_IRQ_FIFO_DATA			1
> +#define SUN4I_GPADC_IRQ_TEMP_DATA			2
>  
>  /* 10s delay before suspending the IP */
>  #define SUN4I_GPADC_AUTOSUSPEND_DELAY			10000
>