This is a note to let you know that I've just added the patch titled
xhci: handle failed buffer copy to URB sg list and fix a W=1 copiler warning
to the 5.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xhci-handle-failed-buffer-copy-to-urb-sg-list-and-fi.patch
and it can be found in the queue-5.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit cd58753dc2100e11b12846ffc52413f3484374ff
Author: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Date: Thu Jun 17 18:03:53 2021 +0300
xhci: handle failed buffer copy to URB sg list and fix a W=1 copiler warning
[ Upstream commit 271a21d8b280b186f8cc9ca6f7151902efde9512 ]
Set the urb->actual_length to bytes successfully copied in case all bytes
weren't copied from a temporary buffer to the URB sg list.
Also print a debug message
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210617150354.1512157-4-mathias.nyman@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 27283654ca08..9248ce8d09a4 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1361,12 +1361,17 @@ static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
urb->transfer_buffer_length,
dir);
- if (usb_urb_dir_in(urb))
+ if (usb_urb_dir_in(urb)) {
len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
urb->transfer_buffer,
buf_len,
0);
-
+ if (len != buf_len) {
+ xhci_dbg(hcd_to_xhci(hcd),
+ "Copy from tmp buf to urb sg list failed\n");
+ urb->actual_length = len;
+ }
+ }
urb->transfer_flags &= ~URB_DMA_MAP_SINGLE;
kfree(urb->transfer_buffer);
urb->transfer_buffer = NULL;
