[dpdk-dev] [PATCH v2] net/ifc: do not notify before HW ready
Xiao Wang
xiao.w.wang at intel.com
Fri Sep 14 03:25:17 CEST 2018
If the device is not clearly reset by the previous driver and holds
some invalid ring addr, and the relay thread kicks it before HW is
properly re-configured, a bad DMA request may happen.
Besides, the notify_addr which is used by the relay thread is set in
the vdpa_ifcvf_start function, if a kick relay happens before
vdpa_ifcvf_start finishes, a null addr is accessed.
Fixes: a3f8150eac6d ("net/ifcvf: add ifcvf vDPA driver")
Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
---
v2:
* Add description for the fix in the commit log.
---
drivers/net/ifc/ifcvf_vdpa.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ifc/ifcvf_vdpa.c b/drivers/net/ifc/ifcvf_vdpa.c
index 3c5430dc0..7d3085d8d 100644
--- a/drivers/net/ifc/ifcvf_vdpa.c
+++ b/drivers/net/ifc/ifcvf_vdpa.c
@@ -503,11 +503,11 @@ update_datapath(struct ifcvf_internal *internal)
if (ret)
goto err;
- ret = setup_notify_relay(internal);
+ ret = vdpa_ifcvf_start(internal);
if (ret)
goto err;
- ret = vdpa_ifcvf_start(internal);
+ ret = setup_notify_relay(internal);
if (ret)
goto err;
@@ -515,12 +515,12 @@ update_datapath(struct ifcvf_internal *internal)
} else if (rte_atomic32_read(&internal->running) &&
(!rte_atomic32_read(&internal->started) ||
!rte_atomic32_read(&internal->dev_attached))) {
- vdpa_ifcvf_stop(internal);
-
ret = unset_notify_relay(internal);
if (ret)
goto err;
+ vdpa_ifcvf_stop(internal);
+
ret = vdpa_disable_vfio_intr(internal);
if (ret)
goto err;
--
2.15.1
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