[PATCH] BLOCK: Move common FS-specific ioctls to linux/fs.h [try #6]

[pandora-kernel.git] / kernel / kmod.c

diff --git a/kernel/kmod.c b/kernel/kmod.c
index 5c470c5..842f801 100644 (file)
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -176,6 +176,8 @@ static int wait_for_helper(void *data)
        if (pid < 0) {
                sub_info->retval = pid;
        } else {
+               int ret;
+
                /*
                 * Normally it is bogus to call wait4() from in-kernel because
                 * wait4() wants to write the exit code to a userspace address.
@@ -185,7 +187,15 @@ static int wait_for_helper(void *data)
                 *
                 * Thus the __user pointer cast is valid here.
                 */
-               sys_wait4(pid, (int __user *) &sub_info->retval, 0, NULL);
+               sys_wait4(pid, (int __user *)&ret, 0, NULL);
+
+               /*
+                * If ret is 0, either ____call_usermodehelper failed and the
+                * real error code is already in sub_info->retval or
+                * sub_info->retval is 0 anyway, so don't mess with it then.
+                */
+               if (ret)
+                       sub_info->retval = ret;
        }
 
        complete(sub_info->complete);