diff mbox series

[v2,7/8] usb: cdns3: gadget: sg_support is only for DEV_VER_V2 or above

Message ID 20200910091130.20937-8-peter.chen@nxp.com
State Superseded
Headers show
Series usb: cdns3: improve the sg use case | expand

Commit Message

Peter Chen Sept. 10, 2020, 9:11 a.m. UTC 
The scatter buffer list support earlier than DEV_VER_V2 is not
good enough, software can't know well about short transfer for it.

Cc: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
 drivers/usb/cdns3/gadget.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index e2c12212dba4..90a66bdc30ba 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -3160,7 +3160,6 @@  static int cdns3_gadget_start(struct cdns3 *cdns)
 	priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
 	priv_dev->gadget.ops = &cdns3_gadget_ops;
 	priv_dev->gadget.name = "usb-ss-gadget";
-	priv_dev->gadget.sg_supported = 1;
 	priv_dev->gadget.quirk_avoids_skb_reserve = 1;
 	priv_dev->gadget.irq = cdns->dev_irq;
 
@@ -3199,6 +3198,8 @@  static int cdns3_gadget_start(struct cdns3 *cdns)
 		readl(&priv_dev->regs->usb_cap2));
 
 	priv_dev->dev_ver = GET_DEV_BASE_VERSION(priv_dev->dev_ver);
+	if (priv_dev->dev_ver >= DEV_VER_V2)
+		priv_dev->gadget.sg_supported = 1;
 
 	priv_dev->zlp_buf = kzalloc(CDNS3_EP_ZLP_BUF_SIZE, GFP_KERNEL);
 	if (!priv_dev->zlp_buf) {