bus/auxiliary: prevent device from being probed again
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Commit Message
The device on auxiliary bus doesn't support being probed again
without being removed firstly. The PMD will detect and return error
for this unsupported operation. Some of the resources would be
cleared wrongly. When quiting, there will be unexpected error like
crash.
To prevent this, the device driver will be checked before probing a
device.
Fixes: 1afce3086cf4 ("bus/auxiliary: introduce auxiliary bus")
Cc: xuemingl@nvidia.com
CC: stable@dpdk.org
Signed-off-by: Bing Zhao <bingz@nvidia.com>
Reviewed-by: Gregory Etelson <getelson@nvidia.com>
Reviewed-by: Matan Azrad <matan@nvidia.com>
---
drivers/bus/auxiliary/auxiliary_common.c | 8 ++++++++
1 file changed, 8 insertions(+)
@@ -89,6 +89,7 @@ rte_auxiliary_probe_one_driver(struct rte_auxiliary_driver *drv,
{
enum rte_iova_mode iova_mode;
int ret;
+ bool already_probed;
if (drv == NULL || dev == NULL)
return -EINVAL;
@@ -116,6 +117,13 @@ rte_auxiliary_probe_one_driver(struct rte_auxiliary_driver *drv,
return -EINVAL;
}
+ already_probed = rte_dev_is_probed(&dev->device);
+ if (already_probed) {
+ RTE_LOG(DEBUG, EAL, "Device %s is already probed on auxiliary bus\n",
+ dev->device.name);
+ return -EEXIST;
+ }
+
/* Allocate interrupt instance */
dev->intr_handle =
rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_PRIVATE);