[dpdk-dev] [PATCH] eal/linuxapp: fix return value check of mknod()

[Zhiyong Yang <zhiyong.yang@intel.com>]

From: Wei Dai <wei.dai@intel.com>

In function pci_mknod_uio_dev() in lib/librte_eal/eal/eal_pci_uio.c,
The return value of mknod() is ret, not f got by fopen().
So the value of ret should be checked for mknod().

Fixes: 67c536bdad93 ("pci: move uio mapping in a dedicated file")

Signed-off-by: Wei Dai <wei.dai@intel.com>
---
 lib/librte_eal/linuxapp/eal/eal_pci_uio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
index 1786b75..3e4ffb5 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
@@ -133,7 +133,7 @@ pci_mknod_uio_dev(const char *sysfs_uio_path, unsigned uio_num)
 	snprintf(filename, sizeof(filename), "/dev/uio%u", uio_num);
 	dev = makedev(major, minor);
 	ret = mknod(filename, S_IFCHR | S_IRUSR | S_IWUSR, dev);
-	if (f == NULL) {
+	if (ret != 0) {
 		RTE_LOG(ERR, EAL, "%s(): mknod() failed %s\n",
 			__func__, strerror(errno));
 		return -1;
-- 
2.5.5