drivers/rtc/rtc-omap.c: fix a memory leak

request_mem_region() will call kzalloc to allocate memory for struct
resource.  release_resource() unregisters the resource but does not free
the allocated memory, thus use release_mem_region() instead to fix the
memory leak.

Also add a missing iounmap() in omap_rtc_remove().

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Tony Lindgren <tony@atomide.com>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 73377b0..e72b523 100644 (file)
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -429,13 +429,14 @@ fail1:
 fail0:
        iounmap(rtc_base);
 fail:
-       release_resource(mem);
+       release_mem_region(mem->start, resource_size(mem));
        return -EIO;
 }
 
 static int __exit omap_rtc_remove(struct platform_device *pdev)
 {
        struct rtc_device       *rtc = platform_get_drvdata(pdev);
+       struct resource         *mem = dev_get_drvdata(&rtc->dev);
 
        device_init_wakeup(&pdev->dev, 0);
 
@@ -447,8 +448,9 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
        if (omap_rtc_timer != omap_rtc_alarm)
                free_irq(omap_rtc_alarm, rtc);
 
-       release_resource(dev_get_drvdata(&rtc->dev));
        rtc_device_unregister(rtc);
+       iounmap(rtc_base);
+       release_mem_region(mem->start, resource_size(mem));
        return 0;
 }