lsblk: check sysfs_read_u64 return code [coverity scan]

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/misc-utils/lsblk.c b/misc-utils/lsblk.c
index 53b59d225cbf67c1ecd866afeaa8397b556d1f95..b4597286c404f5197eef3bcf4cdbcc740c8a5ffe 100644 (file)
--- a/misc-utils/lsblk.c
+++ b/misc-utils/lsblk.c
@@ -821,9 +821,10 @@ static int set_cxt(struct blkdev_cxt *cxt,
 
        cxt->maj = major(devno);
        cxt->min = minor(devno);
+       cxt->size = 0;
 
-       sysfs_read_u64(&cxt->sysfs, "size", &cxt->size);        /* in sectors */
-       cxt->size <<= 9;                                        /* in bytes */
+       if (sysfs_read_u64(&cxt->sysfs, "size", &cxt->size) == 0)       /* in sectors */
+               cxt->size <<= 9;                                        /* in bytes */
 
        sysfs_read_int(&cxt->sysfs, "queue/discard_granularity", &cxt->discard);