vfio: fix maximum number of interrupt for MSI-X

The max number of interrupt request is possible
be changed after rte_intr_callback_register, so
in get_max_intr, we need to check if necessary to
update the max_intr.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>

diff --git a/lib/librte_eal/linuxapp/eal/eal_interrupts.c b/lib/librte_eal/linuxapp/eal/eal_interrupts.c
index b5b3f2b..92a19cb 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal_interrupts.c
+++ b/lib/librte_eal/linuxapp/eal/eal_interrupts.c
@@ -287,6 +287,8 @@ get_max_intr(const struct rte_intr_handle *intr_handle)
                if (src->intr_handle.fd != intr_handle->fd)
                        continue;
 
+               if (src->intr_handle.max_intr < intr_handle->max_intr)
+                       src->intr_handle.max_intr = intr_handle->max_intr;
                if (!src->intr_handle.max_intr)
                        src->intr_handle.max_intr = 1;
                else if (src->intr_handle.max_intr > RTE_MAX_RXTX_INTR_VEC_ID)