[PATCH] dio: add missing iounmap() after ioremap()

[yang.yang29]

From: xu xin <xu.xin16@xxxxxxxxxx>

If kzalloc() fails, the 'va' needs to be unmapped before returning -ENOMEM.

Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: xu xin <xu.xin16@xxxxxxxxxx>
---
 drivers/dio/dio.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c
index 4c06c93..7d19250 100644
--- a/drivers/dio/dio.c
+++ b/drivers/dio/dio.c
@@ -218,9 +218,11 @@ static int __init dio_init(void)

        /* Found a board, allocate it an entry in the list */
        dev = kzalloc(sizeof(struct dio_dev), GFP_KERNEL);
-       if (!dev)
+       if (!dev) {
+           if (scode >= DIOII_SCBASE)
+               iounmap(va);
            return -ENOMEM;
+       }
        dev->bus = &dio_bus;
        dev->dev.parent = &dio_bus.dev;
        dev->dev.bus = &dio_bus_type;
-- 
2.15.2