commit 54578ee883e34d2d1c518d48f1c1e2dd3f387188 upstream.
Since the runtime PM support was added in musb, dsps relies on the timer
calling otg_timer() to activate the usb subsystem. However the driver
doesn't enable the timer for peripheral port, then the peripheral port is
unable to be enumerated by a host if the other usb port is disabled or in
peripheral mode too.
So let's start the timer for peripheral port too.
Fixes: ea2f35c01d5e ("usb: musb: Fix sleeping function called from invalid context for hdrc glue")
Cc: stable@xxxxxxxxxxxxxxx # v4.9+
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Bin Liu <b-liu@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/musb/musb_dsps.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index eb93d0103117..49724ec8f55a 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -196,9 +196,11 @@ static void dsps_musb_enable(struct musb *musb)
musb_writel(reg_base, wrp->epintr_set, epmask);
musb_writel(reg_base, wrp->coreintr_set, coremask);
- /* start polling for ID change in dual-role idle mode */
- if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
- musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE)
+ /*
+ * start polling for runtime PM active and idle,
+ * and for ID change in dual-role idle mode.
+ */
+ if (musb->xceiv->otg->state == OTG_STATE_B_IDLE)
dsps_mod_timer(glue, -1);
}
@@ -269,6 +271,10 @@ static int dsps_check_status(struct musb *musb, void *unused)
musb_set_otg_state(musb, OTG_STATE_A_IDLE);
MUSB_HST_MODE(musb);
}
+
+ if (musb->port_mode == MUSB_PORT_MODE_GADGET)
+ skip_session = 1;
+
if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session)
musb_writeb(mregs, MUSB_DEVCTL,
MUSB_DEVCTL_SESSION);
--
2.17.1
