[PATCH] mtd: maps: fix error return code of physmap_flash_remove()

[Jia-Ju Bai]

When platform_get_drvdata() returns NULL to info, no error return code
of physmap_flash_remove() is assigned.
To fix this bug, err is assigned with -EINVAL in this case

Fixes: 73566edf9b91 ("[MTD] Convert physmap to platform driver")
Reported-by: TOTE Robot <os...@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1...@gmail.com>
---
 drivers/mtd/maps/physmap-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/maps/physmap-core.c b/drivers/mtd/maps/physmap-core.c
index 001ed5deb622..4f63b8430c71 100644
--- a/drivers/mtd/maps/physmap-core.c
+++ b/drivers/mtd/maps/physmap-core.c
@@ -69,8 +69,10 @@ static int physmap_flash_remove(struct platform_device *dev)
        int i, err = 0;
 
        info = platform_get_drvdata(dev);
-       if (!info)
+       if (!info) {
+               err = -EINVAL;
                goto out;
+       }
 
        if (info->cmtd) {
                err = mtd_device_unregister(info->cmtd);
-- 
2.17.1