diff options
| author | Oliver Neukum <oliver@neukum.org> | 2012-04-16 15:28:28 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-18 13:15:51 -0700 |
| commit | 9426cd05682745d1024dbabdec5631309bd2f480 (patch) | |
| tree | a2db2587a008c8286cfc11fa6111bafd59faa4e9 | |
| parent | 2fbe2bf1fd37f9d99950bd8d8093623cf22cf08b (diff) | |
| download | lwn-9426cd05682745d1024dbabdec5631309bd2f480.tar.gz lwn-9426cd05682745d1024dbabdec5631309bd2f480.zip | |
uwb: fix use of del_timer_sync() in interrupt
del_timer_sync() cannot be used in interrupt.
Replace it with del_timer() and a flag
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/uwb/neh.c | 12 |
1 files changed, 11 insertions, 1 deletions
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 |