linux-kernel - Re: [PATCH v1 1/1] mfd: syscon: Remove repetition of the regmap_get_val

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Date:   Mon, 10 Oct 2022 09:49:37 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     linux-kernel@...r.kernel.org, Lee Jones <lee@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, regressions@...ts.linux.dev
Subject: Re: [PATCH v1 1/1] mfd: syscon: Remove repetition of the
 regmap_get_val_endian()

On Sun, Oct 09, 2022 at 09:39:42AM -0700, Guenter Roeck wrote:
> On Mon, Aug 08, 2022 at 05:08:11PM +0300, Andy Shevchenko wrote:
> > Since the commit 0dbdb76c0ca8 ("regmap: mmio: Parse endianness
> > definitions from DT") regmap MMIO parses DT itsef, no need to
> > repeat this in the caller(s).
> > 
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> 
> This patch results in reboot failures for all big endian mips emulations.
> 
> Sample log:
> 
> Network interface test passed
> Boot successful.
> Rebooting
> reboot: Restarting system
> Unable to restart system
> Reboot failed -- System halted
> 
> The problem is not seen with little endian mips emulations. Reverting
> this patch fixes the problem. Bisect log attached.
> 
> #regzbot introduced: 72a95859728a
> #regzbot title: Reboot failure on big endian mips systems

Right, Jason sent a revert already, but Linus asked for the proper submission.

-- 
With Best Regards,
Andy Shevchenko