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path: root/drivers/mtd/mtdchar.c
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Diffstat (limited to 'drivers/mtd/mtdchar.c')
-rw-r--r--drivers/mtd/mtdchar.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 2147e733533b..7d4e7b9da3a1 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -324,6 +324,15 @@ static ssize_t mtdchar_write(struct file *file, const char __user *buf, size_t c
default:
ret = mtd_write(mtd, *ppos, len, &retlen, kbuf);
}
+
+ /*
+ * Return -ENOSPC only if no data could be written at all.
+ * Otherwise just return the number of bytes that actually
+ * have been written.
+ */
+ if ((ret == -ENOSPC) && (total_retlen))
+ break;
+
if (!ret) {
*ppos += retlen;
total_retlen += retlen;
@@ -889,25 +898,26 @@ static int mtdchar_ioctl(struct file *file, u_int cmd, u_long arg)
case OTPGETREGIONINFO:
{
struct otp_info *buf = kmalloc(4096, GFP_KERNEL);
+ size_t retlen;
if (!buf)
return -ENOMEM;
switch (mfi->mode) {
case MTD_FILE_MODE_OTP_FACTORY:
- ret = mtd_get_fact_prot_info(mtd, buf, 4096);
+ ret = mtd_get_fact_prot_info(mtd, 4096, &retlen, buf);
break;
case MTD_FILE_MODE_OTP_USER:
- ret = mtd_get_user_prot_info(mtd, buf, 4096);
+ ret = mtd_get_user_prot_info(mtd, 4096, &retlen, buf);
break;
default:
ret = -EINVAL;
break;
}
- if (ret >= 0) {
+ if (!ret) {
if (cmd == OTPGETREGIONCOUNT) {
- int nbr = ret / sizeof(struct otp_info);
+ int nbr = retlen / sizeof(struct otp_info);
ret = copy_to_user(argp, &nbr, sizeof(int));
} else
- ret = copy_to_user(argp, buf, ret);
+ ret = copy_to_user(argp, buf, retlen);
if (ret)
ret = -EFAULT;
}