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-rw-r--r--src/portable/template/hcd_template.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/portable/template/hcd_template.c b/src/portable/template/hcd_template.c
index b073d6057..694fa8550 100644
--- a/src/portable/template/hcd_template.c
+++ b/src/portable/template/hcd_template.c
@@ -116,6 +116,10 @@ void hcd_device_close(uint8_t rhport, uint8_t dev_addr) {
bool hcd_edpt_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_endpoint_t const * ep_desc) {
(void) rhport;
(void) dev_addr;
+
+ // NOTE: ep_desc is allocated on the stack when called from usbh_edpt_control_open()
+ // If you need to persist any ep_desc values across HCD calls (eg ep_desc->wMaxPacketSize),
+ // then you need to copy the data into another variable inside this function.
(void) ep_desc;
return false;