[PATCH v2] usb: dwc3: core: fix memory leaks in event buffer cleanup

[Gurumoorthy Santhakumar]

In dwc3_free_one_event_buffer(), only the DMA buffer (evt->buf) was
being freed via dma_free_coherent(), but the evt structure itself was
never explicitly freed, causing a memory leak.

In dwc3_free_event_buffers(), the ev_buffs pointer array allocated
with memalign() was never freed after iterating and releasing all
individual event buffers, causing another memory leak.

Fix both leaks by freeing the evt struct in
dwc3_free_one_event_buffer() and freeing dwc->ev_buffs in
dwc3_free_event_buffers() after all entries have been released.

Signed-off-by: Gurumoorthy Santhakumar <gurumoorthy.santhakumar at oss.qualcomm.com>
---
Changes in V2:
- Removed redundant NULL check before free
- Removed NULL assignment to the pointer after free
- Link to V1:
https://lore.kernel.org/u-boot/20260414055013.2978223-1-gurumoorthy.santhakumar@oss.qualcomm.com/
---
---
 drivers/usb/dwc3/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 6f22b9232ba..65c4d1a4e6f 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -206,6 +206,7 @@ static void dwc3_free_one_event_buffer(struct dwc3 *dwc,
 		struct dwc3_event_buffer *evt)
 {
 	dma_free_coherent(evt->buf);
+	free(evt);
 }
 
 /**
@@ -252,6 +253,8 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc)
 		if (evt)
 			dwc3_free_one_event_buffer(dwc, evt);
 	}
+
+	free(dwc->ev_buffs);
 }
 
 /**
-- 
2.34.1