[PATCH 5.12 369/384] usb: dwc2: Fix session request interrupt handler
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-05-10 12:42:51
Also in:
lkml
From: Artur Petrosyan <redacted>
commit 42b32b164acecd850edef010915a02418345a033 upstream.
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: <redacted>
Acked-by: Minas Harutyunyan <redacted>
Signed-off-by: Artur Petrosyan <redacted>
Link: https://lore.kernel.org/r/20210408094550.75484A0094@mailhost.synopsys.com (local)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/dwc2/core_intr.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c@@ -307,6 +307,7 @@ static void dwc2_handle_conn_id_status_c static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg) { int ret; + u32 hprt0; /* Clear interrupt */ dwc2_writel(hsotg, GINTSTS_SESSREQINT, GINTSTS);
@@ -327,6 +328,13 @@ static void dwc2_handle_session_req_intr * 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); } }