arch/ia64/kernel/iosapic: missing test after ioremap()

Missing test after ioremap()

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>

diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index c48b03f..dab4d39 100644 (file)
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -1072,6 +1072,10 @@ iosapic_init (unsigned long phys_addr, unsigned int gsi_base)
        }
 
        addr = ioremap(phys_addr, 0);
+       if (addr == NULL) {
+               spin_unlock_irqrestore(&iosapic_lock, flags);
+               return -ENOMEM;
+       }
        ver = iosapic_version(addr);
        if ((err = iosapic_check_gsi_range(gsi_base, ver))) {
                iounmap(addr);