From: Godfrey Mwangi <godmwan@microsoft.com>
Date: Fri, 4 Aug 2023 19:00:39 +0000 (-0700)
Subject: usb: xhci: pet watchdog during transfers
X-Git-Url: http://git.dujemihanovic.xyz/img/static/gitweb.css?a=commitdiff_plain;h=fe91450a596b558de31ae23f917e53201bc6b4c7;p=u-boot.git

usb: xhci: pet watchdog during transfers

On some platforms with low USB throughput, tranfers
of huge files take a long time and watchdog timer can
expire resulting in hardware reset. Avoid this by
petting the watchdog as long as we have pending transfers.

Signed-off-by: Godfrey Mwangi <godmwan@microsoft.com>
Reviewed-by: Marek Vasut <marex@denx.de>
---

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 68cf08e0b6..34eb4536f0 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -17,6 +17,7 @@
 #include <log.h>
 #include <asm/byteorder.h>
 #include <usb.h>
+#include <watchdog.h>
 #include <asm/unaligned.h>
 #include <linux/bug.h>
 #include <linux/errno.h>
@@ -796,6 +797,8 @@ int xhci_bulk_tx(struct usb_device *udev, unsigned long pipe,
 		/* Calculate length for next transfer */
 		addr += trb_buff_len;
 		trb_buff_len = min((length - running_total), TRB_MAX_BUFF_SIZE);
+
+		schedule();
 	} while (running_total < length);
 
 	giveback_first_trb(udev, ep_index, start_cycle, start_trb);