linux-kernel - [PATCH v3 5/6] usb: musb: Introduce musb_start

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Date:   Tue, 21 Apr 2020 16:30:18 +0300
From:   matwey.kornilov@...il.com
To:     stern@...land.harvard.edu, Bin Liu <b-liu@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org (open list:MUSB MULTIPOINT HIGH SPEED
        DUAL-ROLE CONTROLLER), linux-kernel@...r.kernel.org (open list)
Cc:     "Matwey V. Kornilov" <matwey@....msu.ru>,
        linux-usb@...r.kernel.org (open list:MUSB MULTIPOINT HIGH SPEED
        DUAL-ROLE CONTROLLER), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3 5/6] usb: musb: Introduce musb_start_urb()

From: "Matwey V. Kornilov" <matwey@....msu.ru>

This function allows us to start arbitrary urb.

Signed-off-by: Matwey V. Kornilov <matwey@....msu.ru>
---
 drivers/usb/musb/musb_host.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index c3c9aa8ba973..46d9dd7d6f67 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -213,11 +213,10 @@ static struct musb_qh *musb_ep_get_qh(struct musb_hw_ep *ep, int is_in)
  * Context: controller locked, irqs blocked
  */
 static void
-musb_start_next_urb(struct musb *musb, int is_in, struct musb_qh *qh)
+musb_start_urb(struct musb *musb, int is_in, struct musb_qh *qh, struct urb *urb)
 {
 	u32			len;
 	void __iomem		*mbase =  musb->mregs;
-	struct urb		*urb = next_urb(qh);
 	void			*buf = urb->transfer_buffer;
 	u32			offset = 0;
 	struct musb_hw_ep	*hw_ep = qh->hw_ep;
@@ -293,6 +292,14 @@ musb_start_next_urb(struct musb *musb, int is_in, struct musb_qh *qh)
 	}
 }
 
+static void
+musb_start_next_urb(struct musb *musb, int is_in, struct musb_qh *qh)
+{
+	struct urb *urb = next_urb(qh);
+
+	musb_start_urb(musb, is_in, qh, urb);
+}
+
 /* Context: caller owns controller lock, IRQs are blocked */
 static void musb_giveback(struct musb *musb, struct urb *urb, int status)
 __releases(musb->lock)
-- 
2.25.0