linux-kernel - Re: [PATCH] nvmem: include bit index in cell sysfs file name

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Date: Mon, 22 Jan 2024 16:55:17 +0000
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: Miquel Raynal <miquel.raynal@...tlin.com>, 
 Arnd Bergmann <arnd@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>, regressions@...ts.linux.dev, 
 Rafał Miłecki <rafal@...ecki.pl>, 
 Chen-Yu Tsai <wenst@...omium.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, asahi@...ts.linux.dev, 
 Sven Peter <sven@...npeter.dev>, Michael Walle <michael@...le.cc>, 
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nvmem: include bit index in cell sysfs file name


On Mon, 22 Jan 2024 16:34:10 +0100, Arnd Bergmann wrote:
> Creating sysfs files for all Cells caused a boot failure for linux-6.8-rc1 on
> Apple M1, which (in downstream dts files) has multiple nvmem cells that use the
> same byte address. This causes the device probe to fail with
> 
> [    0.605336] sysfs: cannot create duplicate filename '/devices/platform/soc@...000000/2922bc000.efuse/apple_efuses_nvmem0/cells/efuse@...'
> [    0.605347] CPU: 7 PID: 1 Comm: swapper/0 Tainted: G S                 6.8.0-rc1-arnd-5+ #133
> [    0.605355] Hardware name: Apple Mac Studio (M1 Ultra, 2022) (DT)
> [    0.605362] Call trace:
> [    0.605365]  show_stack+0x18/0x2c
> [    0.605374]  dump_stack_lvl+0x60/0x80
> [    0.605383]  dump_stack+0x18/0x24
> [    0.605388]  sysfs_warn_dup+0x64/0x80
> [    0.605395]  sysfs_add_bin_file_mode_ns+0xb0/0xd4
> [    0.605402]  internal_create_group+0x268/0x404
> [    0.605409]  sysfs_create_groups+0x38/0x94
> [    0.605415]  devm_device_add_groups+0x50/0x94
> [    0.605572]  nvmem_populate_sysfs_cells+0x180/0x1b0
> [    0.605682]  nvmem_register+0x38c/0x470
> [    0.605789]  devm_nvmem_register+0x1c/0x6c
> [    0.605895]  apple_efuses_probe+0xe4/0x120
> [    0.606000]  platform_probe+0xa8/0xd0
> 
> [...]

Applied, thanks!

[1/1] nvmem: include bit index in cell sysfs file name
      commit: b40fed13870045731e374e6bb48800cde0feb4e2

Best regards,
-- 
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>