Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1264687

[PATCH v2 4/4] usb: dwc2: host: Giveback URB in tasklet context

Show all headers | View raw

In commit 94dfd7edfd5c ("USB: HCD: support giveback of URB in tasklet
context") support was added to give back the URB in tasklet context.
Let's take advantage of this in dwc2.

This speeds up the dwc2 interrupt handler considerably.

Note that this requires the change ("usb: dwc2: host: Add a delay before
releasing periodic bandwidth") to come first.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
---
Changes in v2:
- Commit message now says that URB giveback change needs delay change.

 drivers/usb/dwc2/hcd.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 33495b235b3c..b899b06b41cc 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -2266,9 +2266,7 @@ void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
 	kfree(qtd->urb);
 	qtd->urb = NULL;
 
-	spin_unlock(&hsotg->lock);
 	usb_hcd_giveback_urb(dwc2_hsotg_to_hcd(hsotg), urb, status);
-	spin_lock(&hsotg->lock);
 }
 
 /*
@@ -2881,7 +2879,7 @@ static struct hc_driver dwc2_hc_driver = {
 	.hcd_priv_size = sizeof(struct wrapper_priv_data),
 
 	.irq = _dwc2_hcd_irq,
-	.flags = HCD_MEMORY | HCD_USB2,
+	.flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
 
 	.start = _dwc2_hcd_start,
 	.stop = _dwc2_hcd_stop,
-- 
2.6.0.rc2.230.g3dd15c0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[PATCH v2 0/4] dwc2: Speed up the interrupt handler quite a bit Douglas Anderson <dianders@chromium.org> - 2015-11-07 02:30 +0100
  [PATCH v2 4/4] usb: dwc2: host: Giveback URB in tasklet context Douglas Anderson <dianders@chromium.org> - 2015-11-07 02:30 +0100

csiph-web