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-rw-r--r--sys/kern/subr_bus.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index 1d45f28..f196c8b 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -3316,6 +3316,48 @@ resource_list_release(struct resource_list *rl, device_t bus, device_t child,
}
/**
+ * @brief Release all active resources of a given type
+ *
+ * Release all active resources of a specified type. This is intended
+ * to be used to cleanup resources leaked by a driver after detach or
+ * a failed attach.
+ *
+ * @param rl the resource list which was allocated from
+ * @param bus the parent device of @p child
+ * @param child the device whose active resources are being released
+ * @param type the type of resources to release
+ *
+ * @retval 0 success
+ * @retval EBUSY at least one resource was active
+ */
+int
+resource_list_release_active(struct resource_list *rl, device_t bus,
+ device_t child, int type)
+{
+ struct resource_list_entry *rle;
+ int error, retval;
+
+ retval = 0;
+ STAILQ_FOREACH(rle, rl, link) {
+ if (rle->type != type)
+ continue;
+ if (rle->res == NULL)
+ continue;
+ if ((rle->flags & (RLE_RESERVED | RLE_ALLOCATED)) ==
+ RLE_RESERVED)
+ continue;
+ retval = EBUSY;
+ error = resource_list_release(rl, bus, child, type,
+ rman_get_rid(rle->res), rle->res);
+ if (error != 0)
+ device_printf(bus,
+ "Failed to release active resource: %d\n", error);
+ }
+ return (retval);
+}
+
+
+/**
* @brief Fully release a reserved resource
*
* Fully releases a resource reserved via resource_list_reserve().
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