xiaoxiang781216 commented on code in PR #17010:
URL: https://github.com/apache/nuttx/pull/17010#discussion_r2347088299
##########
boards/boardctl.c:
##########
@@ -133,16 +133,25 @@ static inline int
case BOARDIOC_USBDEV_CONNECT: /* Connect the CDC/ACM device */
#ifndef CONFIG_CDCACM_COMPOSITE
{
- DEBUGASSERT(ctrl->handle != NULL);
ret = cdcacm_initialize(ctrl->instance, ctrl->handle);
}
#endif
break;
case BOARDIOC_USBDEV_DISCONNECT: /* Disconnect the CDC/ACM device
*/
{
- DEBUGASSERT(ctrl->handle != NULL && *ctrl->handle != NULL);
- cdcacm_uninitialize(*ctrl->handle);
+#ifdef CONFIG_SYSTEM_CDCACM
+ if (ctrl->instance == CONFIG_SYSTEM_CDCACM_DEVMINOR)
+ {
+ ret = cdcacm_uninitialize_system_cdcacm();
+ }
+ else
+#endif
+ {
+ DEBUGASSERT(ctrl->handle != NULL &&
+ *ctrl->handle != NULL);
+ cdcacm_uninitialize(*ctrl->handle);
Review Comment:
Another approach is making system/cdcacm become a daemon, so it can retrieve
the handle in disconnect.
But, even with the current approach, it's better to hold the handle in
boards/boardctl.c instead each individual usb driver since it's a common
problem happen in other similar drivers(e.g. USB mass storage), we need a
general solution. In the board file we can save the handle in an array or link
list to support the multiple handle easily.
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