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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-09-19 18:50:15 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-09-20 16:09:34 +1000
commit78b782cb788cadbda151ecb61753c109602a250c (patch)
tree4d4e4f435674ab5aaea1a0fa175b9e39b5601272
parent55190f88789ab62a42c3ee050090406b0bcefff8 (diff)
downloadlinux-stericsson-78b782cb788cadbda151ecb61753c109602a250c.tar.gz
of: Change logic to overwrite cmd_line with CONFIG_CMDLINE
We used to overwrite with CONFIG_CMDLINE if we found a chosen node but failed to get bootargs out of it or they were empty, unless CONFIG_CMDLINE_FORCE is set. Instead change that to overwrite if "data" is non empty after the bootargs check. It allows arch code to have other mechanisms to retrieve the command line prior to parsing the device-tree. Note: CONFIG_CMDLINE_FORCE case should ideally be handled elsewhere as it won't work as it-is if the device-tree has no /chosen node Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: devicetree-discuss@lists-ozlabs.org CC: Grant Likely <grant.likely@secretlab.ca> Acked-by: Grant Likely <grant.likely@secretlab.ca>
-rw-r--r--drivers/of/fdt.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 65200af29c52..4af69a3564cc 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -681,9 +681,14 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
if (p != NULL && l > 0)
strlcpy(data, p, min((int)l, COMMAND_LINE_SIZE));
+ /*
+ * CONFIG_CMDLINE is meant to be a default in case nothing else
+ * managed to set the command line, unless CONFIG_CMDLINE_FORCE
+ * is set in which case we override whatever was found earlier.
+ */
#ifdef CONFIG_CMDLINE
#ifndef CONFIG_CMDLINE_FORCE
- if (p == NULL || l == 0 || (l == 1 && (*p) == 0))
+ if (!((char *)data)[0])
#endif
strlcpy(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
#endif /* CONFIG_CMDLINE */