[PATCH] bootm: filter out "<NULL>" rootopts to avoid kernel cmdline noise

[Alexander Shiyan]

Is dev_get_param() return NULL or empty string if missing?
Maybe we need to check (val && *val) ?

пт, 17 апр. 2026 г. в 11:44, Sascha Hauer <s.hauer at pengutronix.de>:
>
> Hi Alexander,
>
> On Thu, Apr 16, 2026 at 03:55:12PM +0300, Alexander Shiyan wrote:
> > When rootopts is set to the literal string "<NULL>" (e.g., due to a
> > missing or invalid value in cdev_get_linux_root_and_opts), the resulting
> > kernel command line contains "root=/dev/... <NULL>", which is invalid
> > and may cause boot failures or confusion.
> >
> > This patch checks for the "<NULL>" string in rootopts and replaces it
> > with NULL before calling format_root_bootarg(), effectively omitting
> > the erroneous token from the command line.
>
> I would rather avoid setting it to "<NULL>" in the first place.
>
> Does the patch I just sent help or is there another place where this
> happens?
>
> Sascha
>
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