[PATCH 1/3] usb: dwc2: Update dwc2_handle_incomplete_isoc_in() function

From	Razmik Karapetyan <Razmik.Karapetyan@synopsys.com>
Newsgroups	linux.kernel
Subject	[PATCH 1/3] usb: dwc2: Update dwc2_handle_incomplete_isoc_in() function
Date	2017-04-19 13:10 +0200
Message-ID	<txVEK-2Kc-19@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Disabled only that ISOC endpoints,for which interrupt bit was set
in the DAINTMSK register. This will allow to minimize incomplete
ISOC IN interrupt handling.

Signed-off-by: Razmik Karapetyan <razmik@synopsys.com>
---
 drivers/usb/dwc2/gadget.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 98a4a79..543ecf1 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3449,14 +3449,21 @@ static void dwc2_gadget_handle_incomplete_isoc_in(struct dwc2_hsotg *hsotg)
 {
 	struct dwc2_hsotg_ep *hs_ep;
 	u32 epctrl;
+	u32 daintmsk;
 	u32 idx;
 
 	dev_dbg(hsotg->dev, "Incomplete isoc in interrupt received:\n");
 
+	daintmsk = dwc2_readl(hsotg->regs + DAINTMSK);
+
 	for (idx = 1; idx <= hsotg->num_of_eps; idx++) {
 		hs_ep = hsotg->eps_in[idx];
+		/* Proceed only unmasked ISOC EPs */
+		if (!hs_ep->isochronous || (BIT(idx) & ~daintmsk))
+			continue;
+
 		epctrl = dwc2_readl(hsotg->regs + DIEPCTL(idx));
-		if ((epctrl & DXEPCTL_EPENA) && hs_ep->isochronous &&
+		if ((epctrl & DXEPCTL_EPENA) &&
 		    dwc2_gadget_target_frame_elapsed(hs_ep)) {
 			epctrl |= DXEPCTL_SNAK;
 			epctrl |= DXEPCTL_EPDIS;
-- 
2.7.4

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[PATCH 1/3] usb: dwc2: Update dwc2_handle_incomplete_isoc_in() function Razmik Karapetyan <Razmik.Karapetyan@synopsys.com> - 2017-04-19 13:10 +0200

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