From 52f274aeb59471c970756082dd94c8db630495f3 Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Mon, 16 Apr 2012 15:28:28 +0200 Subject: [PATCH] uwb: fix use of del_timer_sync() in interrupt commit 9426cd05682745d1024dbabdec5631309bd2f480 upstream. del_timer_sync() cannot be used in interrupt. Replace it with del_timer() and a flag Signed-off-by: Oliver Neukum Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ben Hutchings --- drivers/uwb/neh.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/uwb/neh.c b/drivers/uwb/neh.c index a269937be1b8..8cb71bb333c2 100644 --- a/drivers/uwb/neh.c +++ b/drivers/uwb/neh.c @@ -107,6 +107,7 @@ struct uwb_rc_neh { u8 evt_type; __le16 evt; u8 context; + u8 completed; uwb_rc_cmd_cb_f cb; void *arg; @@ -409,6 +410,7 @@ static void uwb_rc_neh_grok_event(struct uwb_rc *rc, struct uwb_rceb *rceb, size struct device *dev = &rc->uwb_dev.dev; struct uwb_rc_neh *neh; struct uwb_rceb *notif; + unsigned long flags; if (rceb->bEventContext == 0) { notif = kmalloc(size, GFP_ATOMIC); @@ -422,7 +424,11 @@ static void uwb_rc_neh_grok_event(struct uwb_rc *rc, struct uwb_rceb *rceb, size } else { neh = uwb_rc_neh_lookup(rc, rceb); if (neh) { - del_timer_sync(&neh->timer); + spin_lock_irqsave(&rc->neh_lock, flags); + /* to guard against a timeout */ + neh->completed = 1; + del_timer(&neh->timer); + spin_unlock_irqrestore(&rc->neh_lock, flags); uwb_rc_neh_cb(neh, rceb, size); } else dev_warn(dev, "event 0x%02x/%04x/%02x (%zu bytes): nobody cared\n", @@ -568,6 +574,10 @@ static void uwb_rc_neh_timer(unsigned long arg) unsigned long flags; spin_lock_irqsave(&rc->neh_lock, flags); + if (neh->completed) { + spin_unlock_irqrestore(&rc->neh_lock, flags); + return; + } if (neh->context) __uwb_rc_neh_rm(rc, neh); else -- 2.39.2