Re: [PATCH v2 7/9] char: misc: Allocate 4 more fixed minors for watchdog

[Arnd Bergmann]

On Tue, Jul 1, 2025, at 17:24, Zijun Hu wrote:
> From: Zijun Hu <zijun.hu@xxxxxxxxxxxxxxxx>
>
> There are drivers which needs more fixed minors for watchdog, but
> watchdog only has one fixed minor currently, it causes hardcoded and
> unregistered fixed minors are used by these drivers.
>
> Allocate 4 more fixed minors and apply for these drivers.

Missing signoff?


I don't think this is the right fix here, these drivers implement
the normal watchdog API, so they should not even call misc_register
but should instead call watchdog_dev_register().

Obviously doing this right is a bigger change, so maybe the simpler
answer is to use dynamic minors instead of the nonstandard ones.

FWIW, I double-checked to see whether there are any in-tree
references to these two drivers, and there is one each:

drivers/i2c/busses/i2c-i801.c:	{ "Hermes", DMI_DEV_TYPE_OTHER, 0x73, "fscher" },
drivers/i2c/busses/i2c-i801.c:	{ "Hades",  DMI_DEV_TYPE_OTHER, 0x73, "fschds" },
drivers/i2c/busses/i2c-i801.c:	{ "Syleus", DMI_DEV_TYPE_OTHER, 0x73, "fscsyl" },
arch/powerpc/boot/dts/fsl/t4240rdb.dts:                         compatible = "winbond,w83793";

These were added in 2009 and 2016, respectively, so the hardware
is probably around somewhere but quite hard to find.

    Arnd