nvmem: core: return EFBIG on out-of-range write

When writing data that exceeds the nvmem size to a nvmem sysfs file
using the sh redirection operator >, the shell hangs, trying to
write the out-of-range bytes endlessly.

Fix the problem by returning EFBIG described in man 2 write.

Similar change was done for binary sysfs files on commit
0936896056365349afa867c16e9f9100a6707cbf

Signed-off-by: Guy Shapiro <guy.shapiro@mobi-wize.com>
Cc: linux-api@vger.kernel.org
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index de54c7f5048a..3866117bc285 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -135,7 +135,7 @@ static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj,
 
         /* Stop the user from writing */
         if (pos >= nvmem->size)
-                return 0;
+                return -EFBIG;
 
         if (count < nvmem->word_size)
                 return -EINVAL;