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eal/linux: forbid enabling zero interrupt vector

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The patch adds condition check to avoid enable nothing.
In disable state, both max_intr and nb_efd are zero.

Signed-off-by: Cunming Liang <cunming.liang@intel.com>
Acked-by: David Marchand <david.marchand@6wind.com>
This commit is contained in:
Cunming Liang 2015-11-04 16:45:31 +08:00 committed by Thomas Monjalon
parent fe81efaf1d
commit 7eeed91448
3 changed files with 11 additions and 3 deletions
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3
lib/librte_eal/bsdapp/eal/include/exec-env/rte_interrupts.h
View File

@ -85,8 +85,9 @@ rte_intr_rx_ctl(struct rte_intr_handle *intr_handle,
*
* @param intr_handle
* Pointer to the interrupt handle.
* @param nb_vec
* @param nb_efd
* Number of interrupt vector trying to enable.
* The value 0 is not allowed.
* @return
* - On success, zero.
* - On failure, a negative value.

8
lib/librte_eal/linuxapp/eal/eal_interrupts.c
View File

@ -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);
}

3
lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h
View File

@ -176,8 +176,9 @@ rte_intr_rx_ctl(struct rte_intr_handle *intr_handle,
*
* @param intr_handle
* Pointer to the interrupt handle.
* @param nb_vec
* @param nb_efd
* Number of interrupt vector trying to enable.
* The value 0 is not allowed.
* @return
* - On success, zero.
* - On failure, a negative value.