raw/ifpga: fix file descriptor leak in error path

[ upstream commit 194a83d ]

In rte_fpga_do_pr() function, if 'stat' return error the
'file_fd' is never closed thus leading a fd leak.
This patch avoids this.

Coverity issue: 279441
Fixes: ef1e8ed ("raw/ifpga: add Intel FPGA bus rawdev driver")

Signed-off-by: Li Qiang <liq3ea@163.com>
Acked-by: Rosen Xu <rosen.xu@intel.com>

drivers/raw/ifpga_rawdev/ifpga_rawdev.c

@@ -244,7 +244,8 @@ rte_fpga_do_pr(struct rte_rawdev *rawdev, int port_id,
 	if (ret) {
 		IFPGA_RAWDEV_PMD_ERR("stat on bitstream file failed: %s\n",
 				file_name);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto close_fd;
 	}
 	buffer_size = file_stat.st_size;
 	IFPGA_RAWDEV_PMD_INFO("bitstream file size: %zu\n", buffer_size);