[PATCH 2/2] usb: musb: dsps: implement clear_ep_rxintr() callback

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This is for avoiding rx ep bogus interrupt during CPPI channel teardown.

cc: stable@xxxxxxxxxxxxxxx # 4.1+
Signed-off-by: Bin Liu <b-liu@xxxxxx>
---
 drivers/usb/musb/musb_dsps.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 0f17d2140db6..092e255e6f77 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -251,6 +251,17 @@ static void otg_timer(unsigned long _musb)
 	pm_runtime_put_autosuspend(dev);
 }
 
+void dsps_musb_clear_ep_rxintr(struct musb *musb, int epnum)
+{
+	u32 epintr;
+	struct dsps_glue *glue = dev_get_drvdata(musb->controller->parent);
+	const struct dsps_musb_wrapper *wrp = glue->wrp;
+
+	/* musb->lock might already been held */
+	epintr = (1 << epnum) << wrp->rxep_shift;
+	musb_writel(musb->ctrl_base, wrp->epintr_status, epintr);
+}
+
 static irqreturn_t dsps_interrupt(int irq, void *hci)
 {
 	struct musb  *musb = hci;
@@ -606,6 +617,7 @@ static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
 
 	.set_mode	= dsps_musb_set_mode,
 	.recover	= dsps_musb_recover,
+	.clear_ep_rxintr = dsps_musb_clear_ep_rxintr,
 };
 
 static u64 musb_dmamask = DMA_BIT_MASK(32);
-- 
1.9.1

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