[PATCH v2 2/9] baseband/acc: remove interrupt support on VRB1

[Nicolas Chautru]

Not enabling interrupt in VRB1 PMD variant to avoid
potential corner case.

Fixes: 3cabc8eaf524 ("baseband/acc200: support interrupt")
Cc: stable at dpdk.org

Signed-off-by: Nicolas Chautru <nicolas.chautru at intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
 drivers/baseband/acc/rte_vrb_pmd.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/baseband/acc/rte_vrb_pmd.c b/drivers/baseband/acc/rte_vrb_pmd.c
index 3afaea71a3..fc68f47ca6 100644
--- a/drivers/baseband/acc/rte_vrb_pmd.c
+++ b/drivers/baseband/acc/rte_vrb_pmd.c
@@ -586,6 +586,14 @@ vrb_intr_enable(struct rte_bbdev *dev)
 {
 	int ret;
 	struct acc_device *d = dev->data->dev_private;
+
+	if (d->device_variant == VRB1_VARIANT) {
+		/* On VRB1: cannot enable MSI/IR to avoid potential back-pressure corner case. */
+		rte_bbdev_log(ERR, "VRB1 (%s) doesn't support any MSI/MSI-X interrupt\n",
+				dev->data->name);
+		return -ENOTSUP;
+	}
+
 	/*
 	 * MSI/MSI-X are supported.
 	 * Option controlled by vfio-intr through EAL parameter.
-- 
2.34.1