V4L/DVB: nGene: use NULL when pointer is needed

Use NULL when calling a function with pointer parameter, initializing a
pointer and returning a pointer. This will remove the following sparse
warning at different locations (see "make C=1"):
 * warning: Using plain integer as NULL pointer

Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/ngene/ngene-core.c b/drivers/media/dvb/ngene/ngene-core.c
index 645e8b8..52f60d4 100644 (file)
--- a/drivers/media/dvb/ngene/ngene-core.c
+++ b/drivers/media/dvb/ngene/ngene-core.c
@@ -819,7 +819,7 @@ static int ngene_i2c_master_xfer(struct i2c_adapter *adapter,
                                             msg[0].buf, msg[0].len))
                        goto done;
        if (num == 1 && (msg[0].flags & I2C_M_RD))
-               if (!ngene_command_i2c_read(dev, msg[0].addr, 0, 0,
+               if (!ngene_command_i2c_read(dev, msg[0].addr, NULL, 0,
                                            msg[0].buf, msg[0].len, 0))
                        goto done;
 
@@ -882,7 +882,7 @@ static void *tsin_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags)
        if (chan->users > 0)
 #endif
                dvb_dmx_swfilter(&chan->demux, buf, len);
-       return 0;
+       return NULL;
 }
 
 u8 fill_ts[188] = { 0x47, 0x1f, 0xff, 0x10 };
@@ -970,7 +970,7 @@ static void set_transfer(struct ngene_channel *chan, int state)
                       state);
        if (!state) {
                spin_lock_irq(&chan->state_lock);
-               chan->pBufferExchange = 0;
+               chan->pBufferExchange = NULL;
                dvb_ringbuffer_flush(&dev->tsout_rbuf);
                spin_unlock_irq(&chan->state_lock);
        }
@@ -1020,7 +1020,7 @@ static int my_dvb_dmx_ts_card_init(struct dvb_demux *dvbdemux, char *id,
        dvbdemux->feednum = 256;
        dvbdemux->start_feed = start_feed;
        dvbdemux->stop_feed = stop_feed;
-       dvbdemux->write_to_decoder = 0;
+       dvbdemux->write_to_decoder = NULL;
        dvbdemux->dmx.capabilities = (DMX_TS_FILTERING |
                                      DMX_SECTION_FILTERING |
                                      DMX_MEMORY_BASED_FILTERING);
@@ -1094,8 +1094,8 @@ static void free_idlebuffer(struct ngene *dev,
                return;
        free_ringbuffer(dev, rb);
        for (j = 0; j < tb->NumBuffers; j++, Cur = Cur->Next) {
-               Cur->Buffer2 = 0;
-               Cur->scList2 = 0;
+               Cur->Buffer2 = NULL;
+               Cur->scList2 = NULL;
                Cur->ngeneBuffer.Address_of_first_entry_2 = 0;
                Cur->ngeneBuffer.Number_of_entries_2 = 0;
        }
@@ -1141,7 +1141,7 @@ static int create_ring_buffer(struct pci_dev *pci_dev,
        u64 PARingBufferNext;
        struct SBufferHeader *Cur, *Next;
 
-       descr->Head = 0;
+       descr->Head = NULL;
        descr->MemSize = 0;
        descr->PAHead = 0;
        descr->NumBuffers = 0;
@@ -1719,7 +1719,7 @@ static void release_channel(struct ngene_channel *chan)
                if (chan->fe) {
                        dvb_unregister_frontend(chan->fe);
                        dvb_frontend_detach(chan->fe);
-                       chan->fe = 0;
+                       chan->fe = NULL;
                }
                dvbdemux->dmx.close(&dvbdemux->dmx);
                dvbdemux->dmx.remove_frontend(&dvbdemux->dmx,
@@ -1820,7 +1820,7 @@ static void __devexit ngene_remove(struct pci_dev *pdev)
                release_channel(&dev->channel[i]);
        ngene_stop(dev);
        ngene_release_buffers(dev);
-       pci_set_drvdata(pdev, 0);
+       pci_set_drvdata(pdev, NULL);
        pci_disable_device(pdev);
 }
 
@@ -1868,7 +1868,7 @@ fail1:
        ngene_release_buffers(dev);
 fail0:
        pci_disable_device(pci_dev);
-       pci_set_drvdata(pci_dev, 0);
+       pci_set_drvdata(pci_dev, NULL);
        return stat;
 }