[media] media: dvb-core: prepare for enabling irq in complete()

Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().
These functions may be called inside URB->complete(), so use
spin_lock_irqsave().

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/dvb-core/dvb_demux.c b/drivers/media/dvb-core/dvb_demux.c
index 3485655fa08297c1ea6d75e73e40c3b1797e676d..58de4410c5258a7d6009ae47b5becd7e20fa6208 100644 (file)
--- a/drivers/media/dvb-core/dvb_demux.c
+++ b/drivers/media/dvb-core/dvb_demux.c
@@ -476,7 +476,9 @@ static void dvb_dmx_swfilter_packet(struct dvb_demux *demux, const u8 *buf)
 void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf,
                              size_t count)
 {
-       spin_lock(&demux->lock);
+       unsigned long flags;
+
+       spin_lock_irqsave(&demux->lock, flags);
 
        while (count--) {
                if (buf[0] == 0x47)
@@ -484,7 +486,7 @@ void dvb_dmx_swfilter_packets(struct dvb_demux *demux, const u8 *buf,
                buf += 188;
        }
 
-       spin_unlock(&demux->lock);
+       spin_unlock_irqrestore(&demux->lock, flags);
 }
 
 EXPORT_SYMBOL(dvb_dmx_swfilter_packets);
@@ -519,8 +521,9 @@ static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf,
 {
        int p = 0, i, j;
        const u8 *q;
+       unsigned long flags;
 
-       spin_lock(&demux->lock);
+       spin_lock_irqsave(&demux->lock, flags);
 
        if (demux->tsbufp) { /* tsbuf[0] is now 0x47. */
                i = demux->tsbufp;
@@ -564,7 +567,7 @@ static inline void _dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf,
        }
 
 bailout:
-       spin_unlock(&demux->lock);
+       spin_unlock_irqrestore(&demux->lock, flags);
 }
 
 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count)
@@ -581,11 +584,13 @@ EXPORT_SYMBOL(dvb_dmx_swfilter_204);
 
 void dvb_dmx_swfilter_raw(struct dvb_demux *demux, const u8 *buf, size_t count)
 {
-       spin_lock(&demux->lock);
+       unsigned long flags;
+
+       spin_lock_irqsave(&demux->lock, flags);
 
        demux->feed->cb.ts(buf, count, NULL, 0, &demux->feed->feed.ts, DMX_OK);
 
-       spin_unlock(&demux->lock);
+       spin_unlock_irqrestore(&demux->lock, flags);
 }
 EXPORT_SYMBOL(dvb_dmx_swfilter_raw);