of: fix autoloading due to broken modalias with no 'compatible'

Because of an improper dereference, a stray 'C' character was output to
the modalias when no 'compatible' was specified. This is the case for
some old PowerMac drivers which only set the 'name' property. Fix it to
let them match again.

Reported-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Mathieu Malaterre <malat@debian.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Fixes: 6543becf26fff6 ("mod/file2alias: make modalias generation safe for cross compiling")
Cc: stable@vger.kernel.org # v3.9+
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index a9155077feefb957d38dc29b4823a9529a7ee0e9..fec75786f75bbb348d03143af7d2280015394643 100644 (file)
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -384,7 +384,7 @@ static void do_of_entry_multi(void *symval, struct module *mod)
        len = sprintf(alias, "of:N%sT%s", (*name)[0] ? *name : "*",
                      (*type)[0] ? *type : "*");
 
-       if (compatible[0])
+       if ((*compatible)[0])
                sprintf(&alias[len], "%sC%s", (*type)[0] ? "*" : "",
                        *compatible);