Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

[firefly-linux-kernel-4.4.55.git] / drivers / mtd / mtdcore.c

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 34c0b16aed5c4e2f7d61a22d3fdeaf2ca066a632..d201feeb3ca6dc7ffe1380840fb0f826ddb0ec10 100644 (file)
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -883,14 +883,14 @@ EXPORT_SYMBOL_GPL(mtd_read_oob);
  * devices. The user data is one time programmable but the factory data is read
  * only.
  */
-int mtd_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf,
-                          size_t len)
+int mtd_get_fact_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
+                          struct otp_info *buf)
 {
        if (!mtd->_get_fact_prot_info)
                return -EOPNOTSUPP;
        if (!len)
                return 0;
-       return mtd->_get_fact_prot_info(mtd, buf, len);
+       return mtd->_get_fact_prot_info(mtd, len, retlen, buf);
 }
 EXPORT_SYMBOL_GPL(mtd_get_fact_prot_info);
 
@@ -906,14 +906,14 @@ int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len,
 }
 EXPORT_SYMBOL_GPL(mtd_read_fact_prot_reg);
 
-int mtd_get_user_prot_info(struct mtd_info *mtd, struct otp_info *buf,
-                          size_t len)
+int mtd_get_user_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen,
+                          struct otp_info *buf)
 {
        if (!mtd->_get_user_prot_info)
                return -EOPNOTSUPP;
        if (!len)
                return 0;
-       return mtd->_get_user_prot_info(mtd, buf, len);
+       return mtd->_get_user_prot_info(mtd, len, retlen, buf);
 }
 EXPORT_SYMBOL_GPL(mtd_get_user_prot_info);
 
@@ -932,12 +932,22 @@ EXPORT_SYMBOL_GPL(mtd_read_user_prot_reg);
 int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len,
                            size_t *retlen, u_char *buf)
 {
+       int ret;
+
        *retlen = 0;
        if (!mtd->_write_user_prot_reg)
                return -EOPNOTSUPP;
        if (!len)
                return 0;
-       return mtd->_write_user_prot_reg(mtd, to, len, retlen, buf);
+       ret = mtd->_write_user_prot_reg(mtd, to, len, retlen, buf);
+       if (ret)
+               return ret;
+
+       /*
+        * If no data could be written at all, we are out of memory and
+        * must return -ENOSPC.
+        */
+       return (*retlen) ? 0 : -ENOSPC;
 }
 EXPORT_SYMBOL_GPL(mtd_write_user_prot_reg);