[PATCH v4 2/8] usb: xhci: xhci_bulk_tx: Don't "BUG" when comparing addresses

Stefan Roese sr at denx.de
Mon Aug 24 13:04:37 CEST 2020

Octeon uses mapped addresses for virtual and physical memory. It's not
that easy to calculate the resulting addresses here. So let's remove
this BUG_ON() completely, as it's not really helpful.

Please also note, that BUG_ON() is not recommended any more in the Linux

Signed-off-by: Stefan Roese <sr at denx.de>
Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
Cc: Bin Meng <bmeng.cn at gmail.com>
Cc: Marek Vasut <marex at denx.de>


Changes in v4:
- Add Reviewed-by tag from Bin

Changes in v3:
- Minor corrections to the commit text as suggested by Bin

Changes in v2:
- Completely remove BUG_ON() for this trans_event.buffer check
- Reword commit text

 drivers/usb/host/xhci-ring.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 092ed6eaf1..fd15f39906 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -726,8 +726,6 @@ int xhci_bulk_tx(struct usb_device *udev, unsigned long pipe,
 	BUG_ON(TRB_TO_SLOT_ID(field) != slot_id);
 	BUG_ON(TRB_TO_EP_INDEX(field) != ep_index);
-	BUG_ON(*(void **)(uintptr_t)le64_to_cpu(event->trans_event.buffer) -
-		buffer > (size_t)length);
 	record_transfer_result(udev, event, length);

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