linux-kernel - [PATCH 6/8] usb: dwc3: check for requests in started list for stream capable endpoints

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Message-ID: <1532519491-19502-7-git-send-email-anurag.kumar.vulisha@xilinx.com>
Date:   Wed, 25 Jul 2018 17:21:29 +0530
From:   Anurag Kumar Vulisha <anurag.kumar.vulisha@...inx.com>
To:     <balbi@...nel.org>, <gregkh@...uxfoundation.org>
CC:     <v.anuragkumar@...il.com>, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Anurag Kumar Vulisha <anurag.kumar.vulisha@...inx.com>
Subject: [PATCH 6/8] usb: dwc3: check for requests in started list for stream capable endpoints

For stream capable endpoints, uas layer can queue mulpile requests on
single ep with different stream ids. So, there can be multiple pending
requests waiting to be transferred. This patch changes the code to check
for any pending requests waiting to be transferred on ep started_list and
calls __dwc3_gadget_kick_transfer() if any.

Signed-off-by: Anurag Kumar Vulisha <anurag.kumar.vulisha@...inx.com>
---
 drivers/usb/dwc3/gadget.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index af8d470..fe1ea245 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2424,6 +2424,9 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep,
 
 	dwc3_gadget_ep_cleanup_completed_requests(dep, event, status);
 
+	if (dep->stream_capable && !list_empty(&dep->started_list))
+		__dwc3_gadget_kick_transfer(dep);
+
 	if (stop) {
 		dwc3_stop_active_transfer(dep, true);
 		dep->flags = DWC3_EP_ENABLED;
-- 
2.1.1