From: Stefan Roese <sr@denx.de>
Date: Fri, 15 Jan 2021 07:52:56 +0000 (+0100)
Subject: usb: xhci: Fix compare to use physical addresses in xhci_bulk_tx()
X-Git-Tag: submit/tizen_6.5/20211213.042338~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9cdad3cb30cdc77a676280d6fc6452945ea311d8;p=platform%2Fkernel%2Fu-boot.git

usb: xhci: Fix compare to use physical addresses in xhci_bulk_tx()

Testing with v2021.01 on MIPS Octeon has shown, that the latest patch
for the "short packet event trb handling" did introduce a bug on
platforms with virtual address != physical address. This patch fixes
this issue by using the correct address types in the compare (both
physical in this case).

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Aaron Williams <awilliams@marvell.com>
Cc: Chandrakala Chavva <cchavva@marvell.com>
Cc: Ran Wang <ran.wang_1@nxp.com>
Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Cc: Marek Vasut <marex@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
[backport of mainline commit cec804251d4b4765bbcaa207f4c931fef350585e]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Change-Id: Ia5cd6ce705e4b5f330a2bdae70efa0546562df51
---

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index d0308f97b2..ee7f58e2eb 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -727,8 +727,8 @@ again:
 		return -ETIMEDOUT;
 	}
 
-	if ((uintptr_t)(le64_to_cpu(event->trans_event.buffer))
-			!= (uintptr_t)last_transfer_trb_addr) {
+	if ((uintptr_t)(le64_to_cpu(event->trans_event.buffer)) !=
+	    (uintptr_t)virt_to_phys(last_transfer_trb_addr)) {
 		available_length -=
 			(int)EVENT_TRB_LEN(le32_to_cpu(event->trans_event.transfer_len));
 		xhci_acknowledge_event(ctrl);