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OF: Add a warning in case chosen node is not present

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On architectures that only get their bootargs through devicetree's
chosen node (such as RISC-V), that node is mandatory. After a
discussion with Rob [1] I'm adding a warning in case chosen node
is not present, to let users know about it.

[1]: https://patchwork.ozlabs.org/patch/984224/#2016136

Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Nick Kossifidis 2018-11-10 02:53:17 +02:00 committed by Rob Herring
parent a2237fec1e
commit e1e5254427
1 changed files with 5 additions and 1 deletions
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6
drivers/of/fdt.c
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@ -1207,8 +1207,12 @@ bool __init early_init_dt_verify(void *params)
void __init early_init_dt_scan_nodes(void)
{
int rc = 0;
/* Retrieve various information from the /chosen node */
of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
rc = of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
if (!rc)
pr_warn("No chosen node found, continuing without\n");
/* Initialize {size,address}-cells info */
of_scan_flat_dt(early_init_dt_scan_root, NULL);