From: Ricardo Ribalda <ribalda@chromium.org>
Date: Wed, 19 Jul 2023 13:01:04 +0000 (+0000)
Subject: usb: xhci-mtk: set the dma max_seg_size
X-Git-Tag: v4.14.322~38
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9d32f38c5278fc299477cafc67ebb7cf437f51f8;p=thirdparty%2Fkernel%2Fstable.git

usb: xhci-mtk: set the dma max_seg_size

commit 9fd10829a9eb482e192a845675ecc5480e0bfa10 upstream.

Allow devices to have dma operations beyond 64K, and avoid warnings such
as:

DMA-API: xhci-mtk 11200000.usb: mapping sg segment longer than device claims to support [len=98304] [max=65536]

Fixes: 0cbd4b34cda9 ("xhci: mediatek: support MTK xHCI host controller")
Cc: stable <stable@kernel.org>
Tested-by: Zubin Mithra <zsm@chromium.org>
Reported-by: Zubin Mithra <zsm@chromium.org>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://lore.kernel.org/r/20230628-mtk-usb-v2-1-c8c34eb9f229@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 5ad2972114e03..56e78cfdcdd46 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -674,6 +674,7 @@ static int xhci_mtk_probe(struct platform_device *pdev)
 		goto exit_phys;
 
 	device_init_wakeup(dev, true);
+	dma_set_max_seg_size(dev, UINT_MAX);
 
 	xhci = hcd_to_xhci(hcd);
 	xhci->main_hcd = hcd;