[PATCH] spi: correct bus_num and buffer bug in spi core

Correct the following in driver/spi/spi.c in function spi_busnum_to_master:

 * must allow bus_num 0, the if is really not needed.
 * correct the name buffer which is too small for bus_num >= 10000. It

should be 9 bytes big, not 8.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 9 deletions

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 1a3c963dc48a..7d215eaa1370 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -465,15 +465,13 @@ EXPORT_SYMBOL_GPL(spi_unregister_master);
  */
 struct spi_master *spi_busnum_to_master(u16 bus_num)
 {
-        if (bus_num) {
-                char                    name[8];
-                struct kobject          *bus;
-
-                snprintf(name, sizeof name, "spi%u", bus_num);
-                bus = kset_find_obj(&spi_master_class.subsys.kset, name);
-                if (bus)
-                        return container_of(bus, struct spi_master, cdev.kobj);
-        }
+        char                    name[9];
+        struct kobject          *bus;
+
+        snprintf(name, sizeof name, "spi%u", bus_num);
+        bus = kset_find_obj(&spi_master_class.subsys.kset, name);
+        if (bus)
+                return container_of(bus, struct spi_master, cdev.kobj);
         return NULL;
 }
 EXPORT_SYMBOL_GPL(spi_busnum_to_master);