MIPS: Let __dt_register_buses accept a single bus type

Some machines only have one bus type to register (e.g. "simple-bus").

Signed-off-by: Kevin Cernekee <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
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Patchwork: https://patchwork.linux-mips.org/patch/8845/
Signed-off-by: Ralf Baechle <[email protected]>

diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index 452d4350ce424bd19f07896a61df1d6da22a342c..e303cb1ef2f41d5ecc27c8735b2f6e211143b4c8 100644 (file)
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -64,7 +64,10 @@ int __init __dt_register_buses(const char *bus0, const char *bus1)
                panic("device tree not present");
 
        strlcpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
-       strlcpy(of_ids[1].compatible, bus1, sizeof(of_ids[1].compatible));
+       if (bus1) {
+               strlcpy(of_ids[1].compatible, bus1,
+                       sizeof(of_ids[1].compatible));
+       }
 
        if (of_platform_populate(NULL, of_ids, NULL, NULL))
                panic("failed to populate DT");