[PATCH] xhci-pci: set the dma max_seg_size

From: Ricardo Ribalda
Date: Tue Dec 13 2022 - 10:09:23 EST


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

xhci_hcd 0000:00:14.0: mapping sg segment longer than device claims to support [len=98304] [max=65536]

Cc: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
To: Mathias Nyman <mathias.nyman@xxxxxxxxx>
To: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
drivers/usb/host/xhci-pci.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 7bccbe50bab1..116a2f328772 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -453,6 +453,8 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
pm_runtime_allow(&dev->dev);

+ dma_set_max_seg_size(&dev->dev, UINT_MAX);
+
return 0;

put_usb3_hcd:

---
base-commit: 0ec5a38bf8499f403f81cb81a0e3a60887d1993c
change-id: 20221213-xhci-max_seg_size-de366fbf12bc

Best regards,
--
Ricardo Ribalda <ribalda@xxxxxxxxxxxx>