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usb: dwc2: Fix session request interrupt handler

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

Fixes: 21795c826a45 ("usb: dwc2: exit hibernation on session request")
Cc: <stable@vger.kernel.org>
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210408094550.75484A0094@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Artur Petrosyan 2021-04-08 13:45:49 +04:00 committed by Greg Kroah-Hartman
parent 75f43ac3c1
commit 42b32b164a
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/dwc2/core_intr.c
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@ -307,6 +307,7 @@ static void dwc2_handle_conn_id_status_change_intr(struct dwc2_hsotg *hsotg)
static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg) static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
{ {
int ret; int ret;
u32 hprt0;
/* Clear interrupt */ /* Clear interrupt */
dwc2_writel(hsotg, GINTSTS_SESSREQINT, GINTSTS); dwc2_writel(hsotg, GINTSTS_SESSREQINT, GINTSTS);
@ -328,6 +329,13 @@ static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
* established * established
*/ */
dwc2_hsotg_disconnect(hsotg); 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);
} }
} }