mtd: maps: add missing iounmap() in error path

This patch was triggered by the following Coccinelle error:

./drivers/mtd/maps/sc520cdp.c:246:3-9: \
	ERROR: missing iounmap; ioremap on line 242 \
	and execution via conditional on line 244

Since do_map_probe() is also invoked in this loop, it is also necessary to
map_destroy() any initialised struct mtd_info.

Signed-off-by: Luis Henriques <henrix@camandro.org>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/mtd/maps/sc520cdp.c b/drivers/mtd/maps/sc520cdp.c
index 093edd51bdc7..9b1c13aa9f20 100644
--- a/drivers/mtd/maps/sc520cdp.c
+++ b/drivers/mtd/maps/sc520cdp.c
@@ -227,7 +227,7 @@ static void sc520cdp_setup_par(void)
 
 static int __init init_sc520cdp(void)
 {
-        int i, devices_found = 0;
+        int i, j, devices_found = 0;
 
 #ifdef REPROGRAM_PAR
         /* reprogram PAR registers so flash appears at the desired addresses */
@@ -243,6 +243,12 @@ static int __init init_sc520cdp(void)
 
                 if (!sc520cdp_map[i].virt) {
                         printk("Failed to ioremap_nocache\n");
+                        for (j = 0; j < i; j++) {
+                                if (mymtd[j]) {
+                                        map_destroy(mymtd[j]);
+                                        iounmap(sc520cdp_map[j].virt);
+                                }
+                        }
                         return -EIO;
                 }