From: Stephen Hemminger <stephen@networkplumber.org>
Date: Wed, 29 Apr 2015 15:15:45 +0000 (-0700)
Subject: vfio: set eventfd non-blocking and not inherited
X-Git-Tag: spdx-start~9231
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=21a0cf353539131bf7f879a8d5d17374401dff0b;p=dpdk.git

vfio: set eventfd non-blocking and not inherited

Set internal event file descriptor to be non-block and not
inherited across exec.  This prevents accidental hangs and
passing in another thread.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
---

diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_vfio.c b/lib/librte_eal/linuxapp/eal/eal_pci_vfio.c
index aea1fb1249..426953ab4f 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci_vfio.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci_vfio.c
@@ -294,7 +294,7 @@ pci_vfio_setup_interrupts(struct rte_pci_device *dev, int vfio_dev_fd)
 		}
 
 		/* set up an eventfd for interrupts */
-		fd = eventfd(0, 0);
+		fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
 		if (fd < 0) {
 			RTE_LOG(ERR, EAL, "  cannot set up eventfd, "
 					"error %i (%s)\n", errno, strerror(errno));