eal/linux: forbid enabling zero interrupt vector

[dpdk.git] / lib / librte_eal / linuxapp / eal / eal_interrupts.c

diff --git a/lib/librte_eal/linuxapp/eal/eal_interrupts.c b/lib/librte_eal/linuxapp/eal/eal_interrupts.c
index 8758239..8938067 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal_interrupts.c
+++ b/lib/librte_eal/linuxapp/eal/eal_interrupts.c
@@ -45,6 +45,7 @@
 #include <sys/signalfd.h>
 #include <sys/ioctl.h>
 #include <sys/eventfd.h>
+#include <assert.h>
 
 #include <rte_common.h>
 #include <rte_interrupts.h>
@@ -1148,6 +1149,8 @@ rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd)
        int fd;
        uint32_t n = RTE_MIN(nb_efd, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
 
+       assert(nb_efd != 0);
+
        if (intr_handle->type == RTE_INTR_HANDLE_VFIO_MSIX) {
                for (i = 0; i < n; i++) {
                        fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
@@ -1204,5 +1207,8 @@ rte_intr_dp_is_en(struct rte_intr_handle *intr_handle)
 int
 rte_intr_allow_others(struct rte_intr_handle *intr_handle)
 {
-       return !!(intr_handle->max_intr - intr_handle->nb_efd);
+       if (!rte_intr_dp_is_en(intr_handle))
+               return 1;
+       else
+               return !!(intr_handle->max_intr - intr_handle->nb_efd);
 }