pccard_store_cis: fix wrong error handling

The test for the error from pcmcia_replace_cis() was incorrect, and
would always trigger (because if an error didn't happen, the "ret" value
would not be zero, it would be the passed-in count).

Reported and debugged by Fabrice Bellet <fabrice@bellet.info>

Rather than just fix the single broken test, make the code in question
use an understandable code-sequence instead, fixing the whole function
to be more readable.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/pcmcia/socket_sysfs.c b/drivers/pcmcia/socket_sysfs.c
index c5d7476..933cd86 100644 (file)
--- a/drivers/pcmcia/socket_sysfs.c
+++ b/drivers/pcmcia/socket_sysfs.c
@@ -298,7 +298,7 @@ static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, siz
 {
        struct pcmcia_socket *s = to_socket(container_of(kobj, struct class_device, kobj));
        cisdump_t *cis;
-       ssize_t ret = count;
+       int error;
 
        if (off)
                return -EINVAL;
@@ -316,25 +316,22 @@ static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, siz
        cis->Length = count + 1;
        memcpy(cis->Data, buf, count);
 
-       if (pcmcia_replace_cis(s, cis))
-               ret  = -EIO;
-
+       error = pcmcia_replace_cis(s, cis);
        kfree(cis);
+       if (error)
+               return -EIO;
 
-       if (!ret) {
-               mutex_lock(&s->skt_mutex);
-               if ((s->callback) && (s->state & SOCKET_PRESENT) &&
-                   !(s->state & SOCKET_CARDBUS)) {
-                       if (try_module_get(s->callback->owner)) {
-                               s->callback->requery(s);
-                               module_put(s->callback->owner);
-                       }
+       mutex_lock(&s->skt_mutex);
+       if ((s->callback) && (s->state & SOCKET_PRESENT) &&
+           !(s->state & SOCKET_CARDBUS)) {
+               if (try_module_get(s->callback->owner)) {
+                       s->callback->requery(s);
+                       module_put(s->callback->owner);
                }
-               mutex_unlock(&s->skt_mutex);
        }
+       mutex_unlock(&s->skt_mutex);
 
-
-       return (ret);
+       return count;
 }