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Commit a32ccf93 authored by Artur Petrosyan's avatar Artur Petrosyan Committed by Greg Kroah-Hartman
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usb: dwc2: Fix session request interrupt handler 



commit 42b32b164acecd850edef010915a02418345a033 upstream.

According to programming guide in host mode, port
power must be turned on in session request
interrupt handlers.

Fixes: 21795c82 ("usb: dwc2: exit hibernation on session request")
Cc: <stable@vger.kernel.org>
Acked-by: default avatarMinas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: default avatarArtur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210408094550.75484A0094@mailhost.synopsys.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent be9997ba

drivers/usb/dwc2/core_intr.c

+8 −0
Original line number Diff line number Diff line
@@ -312,6 +312,7 @@ static void dwc2_handle_conn_id_status_change_intr(struct dwc2_hsotg *hsotg) 
static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)

{

	int ret;

	u32 hprt0;



	/* Clear interrupt */

	dwc2_writel(hsotg, GINTSTS_SESSREQINT, GINTSTS);
@@ -332,6 +333,13 @@ static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg) 
		 * established

		 */

		dwc2_hsotg_disconnect(hsotg);

	} else {

		/* Turn on the port power bit. */

		hprt0 = dwc2_read_hprt0(hsotg);

		hprt0 |= HPRT0_PWR;

		dwc2_writel(hsotg, hprt0, HPRT0);

		/* Connect hcd after port power is set. */

		dwc2_hcd_connect(hsotg);

	}

}