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of: earlycon: Log more helpful message if stdout-path node not found 

Earlycon may fail to initialize for a variety of reasons, most of
which log the default early param message. If the stdout-path node is
not found, log the path which was not found (and suppress the
default early param message).

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2016-01-16 15:23:48 -08:00 committed by Greg Kroah-Hartman
parent dc6b576b28
commit 0fcc286f6a
1 changed files with 6 additions and 3 deletions
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9
drivers/of/fdt.c
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@ -820,11 +820,14 @@ static int __init early_init_dt_scan_chosen_serial(void)
q = strchrnul(p, ':');
if (*q != '\0')
options = q + 1;
l = q - p;
/* Get the node specified by stdout-path */
offset = fdt_path_offset_namelen(fdt, p, q - p);
if (offset < 0)
return -ENODEV;
offset = fdt_path_offset_namelen(fdt, p, l);
if (offset < 0) {
pr_warn("earlycon: stdout-path %.*s not found\n", l, p);
return 0;
}
for (match = __earlycon_table; match < __earlycon_table_end; match++) {
if (!match->compatible[0])