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usb: dwc2: Add safety check for STSPHSERCVD intr

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STSPHSERCVD (status phase received) interrupt should be
handled when EP0 is in DWC2_EP0_DATA_OUT state.

Sometimes STSPHSERCVD interrupt asserted , when EP0
is not in DATA_OUT state. Spurios interrupt.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Minas Harutyunyan 2018-01-16 16:03:58 +04:00 committed by Felipe Balbi
parent 201ec568c5
commit 9e95a66cce
1 changed files with 7 additions and 3 deletions
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10
drivers/usb/dwc2/gadget.c
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@ -2976,9 +2976,13 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
if (ints & DXEPINT_STSPHSERCVD) {
dev_dbg(hsotg->dev, "%s: StsPhseRcvd\n", __func__);
/* Move to STATUS IN for DDMA */
if (using_desc_dma(hsotg))
dwc2_hsotg_ep0_zlp(hsotg, true);
/* Safety check EP0 state when STSPHSERCVD asserted */
if (hsotg->ep0_state == DWC2_EP0_DATA_OUT) {
/* Move to STATUS IN for DDMA */
if (using_desc_dma(hsotg))
dwc2_hsotg_ep0_zlp(hsotg, true);
}
}
if (ints & DXEPINT_BACK2BACKSETUP)