[PATCH] ioremap balanced with iounmap for drivers/serial/mpsc.c

ioremap must be balanced by an iounmap and failing to do so can result
in a memory leak.

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c
index 63d2a66e563b..704243c9f78a 100644
--- a/drivers/serial/mpsc.c
+++ b/drivers/serial/mpsc.c
@@ -1893,6 +1893,10 @@ mpsc_drv_map_regs(struct mpsc_port_info *pi, struct platform_device *pd)
         }
         else {
                 mpsc_resource_err("SDMA base");
+                if (pi->mpsc_base) {
+                        iounmap(pi->mpsc_base);
+                        pi->mpsc_base = NULL;
+                }
                 return -ENOMEM;
         }
 
@@ -1905,6 +1909,14 @@ mpsc_drv_map_regs(struct mpsc_port_info *pi, struct platform_device *pd)
         }
         else {
                 mpsc_resource_err("BRG base");
+                if (pi->mpsc_base) {
+                        iounmap(pi->mpsc_base);
+                        pi->mpsc_base = NULL;
+                }
+                if (pi->sdma_base) {
+                        iounmap(pi->sdma_base);
+                        pi->sdma_base = NULL;
+                }
                 return -ENOMEM;
         }