Improving error checking by now use a return value from sscanf.

This was found using a static code analysis program called cppcheck

Signed-off-by: Rickard Strandqvist <rickard_strandqv...@spectrumdigital.se>
---
 drivers/staging/lustre/lustre/fid/lproc_fid.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/fid/lproc_fid.c 
b/drivers/staging/lustre/lustre/fid/lproc_fid.c
index 6a21f07..9b4ada4 100644
--- a/drivers/staging/lustre/lustre/fid/lproc_fid.c
+++ b/drivers/staging/lustre/lustre/fid/lproc_fid.c
@@ -85,7 +85,7 @@ static int lprocfs_fid_write_common(const char __user 
*buffer, size_t count,
        rc = sscanf(kernbuf, "[%llx - %llx]\n",
                    (unsigned long long *)&tmp.lsr_start,
                    (unsigned long long *)&tmp.lsr_end);
-       if (!range_is_sane(&tmp) || range_is_zero(&tmp) ||
+       if (rc != 2 || !range_is_sane(&tmp) || range_is_zero(&tmp) ||
            tmp.lsr_start < range->lsr_start || tmp.lsr_end > range->lsr_end)
                return -EINVAL;
        *range = tmp;
-- 
1.7.10.4

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