driver core: Early dev_name() depends on slab_is_available().

The early dev_name() setup needs to do an allocation which can only be
satisfied under slab_is_available() conditions. Some of the early
platform drivers may be initialized before this point, and those still
need to contend themselves with an empty dev_name.

This fixes up a regression with the SH earlyprintk which was bailing out
prior to hitting the early probe path due to not being able to satisfy
the early allocation. Other early platform drivers (such as the early
timers) that need to match the dev name are sufficiently late that
allocations are already possible.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index f2377f3d95e5b7e91fc3f5c97e19e6b61e551546..ef51b008384044f9d2566663a858ed1b2746eaf4 100644 (file)
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -1244,7 +1244,7 @@ static int __init early_platform_driver_probe_id(char *class_str,
                         * dev_name() and others to be used before the
                         * rest of the driver core is initialized.
                         */
-                       if (!match->dev.init_name) {
+                       if (!match->dev.init_name && slab_is_available()) {
                                if (match->id != -1)
                                        match->dev.init_name =
                                                kasprintf(GFP_KERNEL, "%s.%d",