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

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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
0936896056

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>
This commit is contained in:
Guy Shapiro 2017-09-11 11:00:11 +02:00 committed by Greg Kroah-Hartman
parent 93dc1774d2
commit 38b0774c05
1 changed files with 1 additions and 1 deletions
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2
drivers/nvmem/core.c
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@ -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;