linux-kernel - [PATCH 0/2] of: Fix handling CONFIG_CMDLINE* even without /chosen node

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Message-Id: <20230103-dt-cmdline-fix-v1-0-7038e88b18b6@kernel.org>
Date:   Tue, 03 Jan 2023 12:00:31 -0600
From:   Rob Herring <robh@...nel.org>
To:     Geoff Levand <geoff@...radead.org>,
        Alexander Sverdlin <alexander.sverdlin@...il.com>,
        Frank Rowand <frowand.list@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] of: Fix handling CONFIG_CMDLINE* even without /chosen node

Commit a7d550f82b445cf218b47a2c1a9c56e97ecb8c7a (of: fdt: Honor CONFIG_CMDLINE*
even without /chosen node) moved the processing of the kernel built-in command
line (CONFIG_CMDLINE) from the early_init_dt_scan_chosen routine to the
early_init_dt_scan_nodes routine.

The current powerpc startup code does not call into early_init_dt_scan_nodes, so
processing of CONFIG_CMDLINE never happens, even if CONFIG_CMDLINE_FORCE=y.
The result is an empty kernel command line, and mounting of the root file system
then fails with a kernel panic (not syncing: VFS: Unable to mount root fs).

Let's revert the above commit and redo the missing /chosen node handling 
within early_init_dt_scan_chosen().

Signed-off-by: Rob Herring <robh@...nel.org>
---
Rob Herring (2):
      Revert "of: fdt: Honor CONFIG_CMDLINE* even without /chosen node"
      of: fdt: Honor CONFIG_CMDLINE* even without /chosen node, take 2

 drivers/of/fdt.c | 54 ++++++++++++++++++++++++++++--------------------------
 1 file changed, 28 insertions(+), 26 deletions(-)
---
base-commit: 1b929c02afd37871d5afb9d498426f83432e71c2
change-id: 20230103-dt-cmdline-fix-e36eb7e39b75

Best regards,
-- 
Rob Herring <robh@...nel.org>