OMAP2+: mailbox: fix lookups for multiple mailboxes

The pointer math in omap_mbox_get() is not quite right, and leads to
passing NULL to strcmp() when searching for an mbox that is not first
in the list.

Convert to using array indexing as is done in all the other functions
which walk the mbox list.

Tested on OMAP2420/n810, OMAP3630/zoom3, OMAP4430/Blaze

Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c
index 459b319a9faddc43ee46e3baf4eb2f4cd1367cfc..49d3208793e5308e16ee0c0e4ae4f7fdd08d5f46 100644 (file)
--- a/arch/arm/plat-omap/mailbox.c
+++ b/arch/arm/plat-omap/mailbox.c
@@ -322,15 +322,18 @@ static void omap_mbox_fini(struct omap_mbox *mbox)
 
 struct omap_mbox *omap_mbox_get(const char *name, struct notifier_block *nb)
 {
-       struct omap_mbox *mbox;
-       int ret;
+       struct omap_mbox *_mbox, *mbox = NULL;
+       int i, ret;
 
        if (!mboxes)
                return ERR_PTR(-EINVAL);
 
-       for (mbox = *mboxes; mbox; mbox++)
-               if (!strcmp(mbox->name, name))
+       for (i = 0; (_mbox = mboxes[i]); i++) {
+               if (!strcmp(_mbox->name, name)) {
+                       mbox = _mbox;
                        break;
+               }
+       }
 
        if (!mbox)
                return ERR_PTR(-ENOENT);