linux-kernel - Re: [PATCH v2] i2c: microchip-core: re-fix fake detections w/ i2cdetect

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Message-ID: <20250630-carnage-portly-8ac978efd2b9@spud>
Date: Mon, 30 Jun 2025 16:04:49 +0100
From: Conor Dooley <conor@...nel.org>
To: kernel test robot <lkp@...el.com>
Cc: linux-i2c@...r.kernel.org, llvm@...ts.linux.dev,
	oe-kbuild-all@...ts.linux.dev,
	Conor Dooley <conor.dooley@...rochip.com>,
	Daire McNamara <daire.mcnamara@...rochip.com>,
	Andi Shyti <andi.shyti@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] i2c: microchip-core: re-fix fake detections w/
 i2cdetect

On Sat, Jun 28, 2025 at 10:28:45PM +0800, kernel test robot wrote:
> Hi Conor,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on andi-shyti/i2c/i2c-host]
> [also build test WARNING on linus/master v6.16-rc3 next-20250627]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Conor-Dooley/i2c-microchip-core-re-fix-fake-detections-w-i2cdetect/20250627-001626
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux.git i2c/i2c-host
> patch link:    https://lore.kernel.org/r/20250626-unusable-excess-da94ebc218e8%40spud
> patch subject: [PATCH v2] i2c: microchip-core: re-fix fake detections w/ i2cdetect
> config: riscv-randconfig-002-20250628 (https://download.01.org/0day-ci/archive/20250628/202506282209.FXWbPIPz-lkp@intel.com/config)
> compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250628/202506282209.FXWbPIPz-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202506282209.FXWbPIPz-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
> >> drivers/i2c/busses/i2c-microchip-corei2c.c:510:6: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
>            if (ret < 0)
>                ^~~
>    drivers/i2c/busses/i2c-microchip-corei2c.c:438:9: note: initialize the variable 'ret' to silence this warning
>            int ret;
>                   ^
>                    = 0
>    1 warning generated.

Oh damn it, I accidentally committed a version that I was using to
provoke the WARN while trying to understand why this was corrupting
the workqueue.
V3 incoming.

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