[PATCH -next] mtd: spinand: Fix missing unlock on error path

[Wei Yongjun]

Add the missing unlock before return from function
spinand_mtd_(read|write) in the error handling case.

Fixes: c898e0526fb6 ("mtd: nand: Add core infrastructure to support SPI NANDs")
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/mtd/nand/spi/core.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 17d207a..8ac1ba95 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -560,12 +560,16 @@ static int spinand_mtd_read(struct mtd_info *mtd, loff_t 
from,
 
        nanddev_io_for_each_page(nand, from, ops, &iter) {
                ret = spinand_select_target(spinand, iter.req.pos.target);
-               if (ret)
+               if (ret) {
+                       mutex_unlock(&spinand->lock);
                        return ret;
+               }
 
                ret = spinand_ecc_enable(spinand, enable_ecc);
-               if (ret)
+               if (ret) {
+                       mutex_unlock(&spinand->lock);
                        return ret;
+               }
 
                ret = spinand_read_page(spinand, &iter.req, enable_ecc);
                if (ret < 0 && ret != -EBADMSG)
@@ -609,11 +613,11 @@ static int spinand_mtd_write(struct mtd_info *mtd, loff_t 
to,
        nanddev_io_for_each_page(nand, to, ops, &iter) {
                ret = spinand_select_target(spinand, iter.req.pos.target);
                if (ret)
-                       return ret;
+                       break;
 
                ret = spinand_ecc_enable(spinand, enable_ecc);
                if (ret)
-                       return ret;
+                       break;
 
                ret = spinand_write_page(spinand, &iter.req);
                if (ret)