Fail-safe dev_start() operation can be called by both the application
and the hot-plug alarm mechanism.

The installation of Rx interrupt are triggered from dev_start() in any
time it is called while actually the Rx interrupt should be installed
only by the application calls.

So, each plug-in event causes reinstallation which causes memory leak
and spoils the fail-safe Rx interrupt mechanism.

Trigger the Rx interrupt installation only when it does not exist.

Fixes: 9e0360aebf23 ("net/failsafe: register as Rx interrupt mode")

Signed-off-by: Matan Azrad <>
 drivers/net/failsafe/failsafe_intr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/failsafe/failsafe_intr.c 
index f6ff04d..6b7f9c1 100644
--- a/drivers/net/failsafe/failsafe_intr.c
+++ b/drivers/net/failsafe/failsafe_intr.c
@@ -523,7 +523,7 @@ void failsafe_rx_intr_uninstall_subdevice(struct sub_device 
        const struct rte_intr_conf *const intr_conf =
-       if (intr_conf->rxq == 0)
+       if (intr_conf->rxq == 0 || dev->intr_handle != NULL)
                return 0;
        if (fs_rx_intr_vec_install(priv) < 0)
                return -rte_errno;

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