From f905bc68833b37b2274dc269fd35edb19e67aed7 Mon Sep 17 00:00:00 2001 From: George Cherian Date: Fri, 14 Nov 2014 13:54:46 +0530 Subject: [PATCH] usb: musb: core: Disable the Interrupts till BABBLE is fully handled Disable the MUSB interrupts till MUSB is recovered fully from BABBLE condition. There are chances that we could get multiple interrupts till the time the babble recover work gets scheduled. Sometimes this could even end up in an endless loop making MUSB itself unusable. Reported-by: Felipe Balbi Signed-off-by: George Cherian Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index f1dfe53515fb..5257928425ce 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -423,6 +423,7 @@ void musb_hnp_stop(struct musb *musb) musb->port1_status &= ~(USB_PORT_STAT_C_CONNECTION << 16); } +static void musb_generic_disable(struct musb *musb); /* * Interrupt Service Routine to record USB "global" interrupts. * Since these do not happen often and signify things of @@ -846,9 +847,11 @@ b_host: } /* handle babble condition */ - if (int_usb & MUSB_INTR_BABBLE && is_host_active(musb)) + if (int_usb & MUSB_INTR_BABBLE && is_host_active(musb)) { + musb_generic_disable(musb); schedule_delayed_work(&musb->recover_work, msecs_to_jiffies(100)); + } #if 0 /* REVISIT ... this would be for multiplexing periodic endpoints, or -- 2.39.2