x86: ioremap fix failing nesting check
Mika Kukkonen noticed that the nesting check in early_iounmap() is not
actually done.
Reported-by: Mika Kukkonen <mikukkon@srv1-m700-lanp.koti>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: torvalds@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: mikukkon@iki.fi
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 71bb315..2b2bb3f 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -593,10 +593,11 @@
unsigned long offset;
unsigned int nrpages;
enum fixed_addresses idx;
- unsigned int nesting;
+ int nesting;
nesting = --early_ioremap_nested;
- WARN_ON(nesting < 0);
+ if (WARN_ON(nesting < 0))
+ return;
if (early_ioremap_debug) {
printk(KERN_INFO "early_iounmap(%p, %08lx) [%d]\n", addr,