eal: add function to query device status

[dpdk.git] / lib / librte_eal / common / eal_common_dev.c

diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
index 631e174..f6e490a 100644 (file)
--- a/lib/librte_eal/common/eal_common_dev.c
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -76,6 +76,13 @@ static int cmp_dev_name(const struct rte_device *dev, const void *_name)
        return strcmp(dev->name, name);
 }
 
+int __rte_experimental
+rte_dev_is_probed(const struct rte_device *dev)
+{
+       /* The field driver should be set only when the probe is successful. */
+       return dev->driver != NULL;
+}
+
 int rte_eal_dev_attach(const char *name, const char *devargs)
 {
        struct rte_bus *bus;
@@ -212,7 +219,7 @@ local_dev_probe(const char *devargs, struct rte_device **new_dev)
                goto err_devarg;
        }
 
-       if (dev->driver != NULL) {
+       if (rte_dev_is_probed(dev)) {
                RTE_LOG(ERR, EAL, "Device is already plugged\n");
                return -EEXIST;
        }
@@ -355,11 +362,6 @@ local_dev_remove(struct rte_device *dev)
 {
        int ret;
 
-       if (dev->driver == NULL) {
-               RTE_LOG(ERR, EAL, "Device is already unplugged\n");
-               return -ENOENT;
-       }
-
        if (dev->bus->unplug == NULL) {
                RTE_LOG(ERR, EAL, "Function unplug not supported by bus (%s)\n",
                        dev->bus->name);
@@ -385,6 +387,11 @@ rte_dev_remove(struct rte_device *dev)
        char *devargs;
        int ret;
 
+       if (!rte_dev_is_probed(dev)) {
+               RTE_LOG(ERR, EAL, "Device is not probed\n");
+               return -ENOENT;
+       }
+
        ret = build_devargs(dev->devargs->bus->name, dev->name, "", &devargs);
        if (ret != 0)
                return ret;