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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