[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>

diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c
index 63d2a66..704243c 100644 (file)
--- 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;
        }