media: Convert from tasklet to BH workqueue

The only generic interface to execute asynchronously in the BH context is
tasklet; however, it's marked deprecated and has some design flaws. To
replace tasklets, BH workqueue support was recently added. A BH workqueue
behaves similarly to regular workqueues except that the queued work items
are executed in the BH context.

This patch converts drivers/media/* from tasklet to BH workqueue.

Based on the work done by Tejun Heo <tj@kernel.org>

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

21 files changed, 84 insertions, 76 deletions

diff --git a/drivers/media/pci/bt8xx/bt878.c b/drivers/media/pci/bt8xx/bt878.c
index 5c9ba4bfc1be..62a6c4a80bed 100644
--- a/drivers/media/pci/bt8xx/bt878.c
+++ b/drivers/media/pci/bt8xx/bt878.c
@@ -300,8 +300,8 @@ static irqreturn_t bt878_irq(int irq, void *dev_id)
 		}
 		if (astat & BT878_ARISCI) {
 			bt->finished_block = (stat & BT878_ARISCS) >> 28;
-			if (bt->tasklet.callback)
-				tasklet_schedule(&bt->tasklet);
+			if (bt->bh_work.func)
+				queue_work(system_bh_wq, &bt->bh_work);
 			break;
 		}
 		count++;
@@ -478,8 +478,8 @@ static int bt878_probe(struct pci_dev *dev, const struct pci_device_id *pci_id)
 	btwrite(0, BT878_AINT_MASK);
 	bt878_num++;
 
-	if (!bt->tasklet.func)
-		tasklet_disable(&bt->tasklet);
+	if (!bt->bh_work.func)
+		disable_work_sync(&bt->bh_work);
 
 	return 0;
 
diff --git a/drivers/media/pci/bt8xx/bt878.h b/drivers/media/pci/bt8xx/bt878.h
index fde8db293c54..5b1c7f56e553 100644
--- a/drivers/media/pci/bt8xx/bt878.h
+++ b/drivers/media/pci/bt8xx/bt878.h
@@ -14,6 +14,7 @@
 #include <linux/sched.h>
 #include <linux/spinlock.h>
 #include <linux/mutex.h>
+#include <linux/workqueue.h>
 
 #include "bt848.h"
 #include "bttv.h"
@@ -120,7 +121,7 @@ struct bt878 {
 	dma_addr_t risc_dma;
 	u32 risc_pos;
 
-	struct tasklet_struct tasklet;
+	struct work_struct bh_work;
 	int shutdown;
 };
 
diff --git a/drivers/media/pci/bt8xx/dvb-bt8xx.c b/drivers/media/pci/bt8xx/dvb-bt8xx.c
index 390cbba6c065..f0fbb468aea2 100644
--- a/drivers/media/pci/bt8xx/dvb-bt8xx.c
+++ b/drivers/media/pci/bt8xx/dvb-bt8xx.c
@@ -39,9 +39,9 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 
 #define IF_FREQUENCYx6 217    /* 6 * 36.16666666667MHz */
 
-static void dvb_bt8xx_task(struct tasklet_struct *t)
+static void dvb_bt8xx_work(struct work_struct *t)
 {
-	struct bt878 *bt = from_tasklet(bt, t, tasklet);
+	struct bt878 *bt = from_work(bt, t, bh_work);
 	struct dvb_bt8xx_card *card = dev_get_drvdata(&bt->adapter->dev);
 
 	dprintk("%d\n", card->bt->finished_block);
@@ -782,7 +782,7 @@ static int dvb_bt8xx_load_card(struct dvb_bt8xx_card *card, u32 type)
 		goto err_disconnect_frontend;
 	}
 
-	tasklet_setup(&card->bt->tasklet, dvb_bt8xx_task);
+	INIT_WORK(&card->bt->bh_work, dvb_bt8xx_work);
 
 	frontend_init(card, type);
 
@@ -922,7 +922,7 @@ static void dvb_bt8xx_remove(struct bttv_sub_device *sub)
 	dprintk("dvb_bt8xx: unloading card%d\n", card->bttv_nr);
 
 	bt878_stop(card->bt);
-	tasklet_kill(&card->bt->tasklet);
+	cancel_work_sync(&card->bt->bh_work);
 	dvb_net_release(&card->dvbnet);
 	card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_mem);
 	card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_hw);
diff --git a/drivers/media/pci/ddbridge/ddbridge.h b/drivers/media/pci/ddbridge/ddbridge.h
index f3699dbd193f..f01ecdb0b627 100644
--- a/drivers/media/pci/ddbridge/ddbridge.h
+++ b/drivers/media/pci/ddbridge/ddbridge.h
@@ -298,7 +298,7 @@ struct ddb_link {
 	spinlock_t             lock; /* lock link access */
 	struct mutex           flash_mutex; /* lock flash access */
 	struct ddb_lnb         lnb;
-	struct tasklet_struct  tasklet;
+	struct work_struct     bh_work;
 	struct ddb_ids         ids;
 
 	spinlock_t             temp_lock; /* lock temp chip access */
diff --git a/drivers/media/pci/mantis/hopper_cards.c b/drivers/media/pci/mantis/hopper_cards.c
index c0bd5d7e148b..b85aef4e2b24 100644
--- a/drivers/media/pci/mantis/hopper_cards.c
+++ b/drivers/media/pci/mantis/hopper_cards.c
@@ -116,7 +116,7 @@ static irqreturn_t hopper_irq_handler(int irq, void *dev_id)
 	if (stat & MANTIS_INT_RISCI) {
 		dprintk(MANTIS_DEBUG, 0, "<%s>", label[8]);
 		mantis->busy_block = (stat & MANTIS_INT_RISCSTAT) >> 28;
-		tasklet_schedule(&mantis->tasklet);
+		queue_work(system_bh_wq, &mantis->bh_work);
 	}
 	if (stat & MANTIS_INT_I2CDONE) {
 		dprintk(MANTIS_DEBUG, 0, "<%s>", label[9]);
diff --git a/drivers/media/pci/mantis/mantis_cards.c b/drivers/media/pci/mantis/mantis_cards.c
index 906e4500d87d..b44b4cf42f86 100644
--- a/drivers/media/pci/mantis/mantis_cards.c
+++ b/drivers/media/pci/mantis/mantis_cards.c
@@ -125,7 +125,7 @@ static irqreturn_t mantis_irq_handler(int irq, void *dev_id)
 	if (stat & MANTIS_INT_RISCI) {
 		dprintk(MANTIS_DEBUG, 0, "<%s>", label[8]);
 		mantis->busy_block = (stat & MANTIS_INT_RISCSTAT) >> 28;
-		tasklet_schedule(&mantis->tasklet);
+		queue_work(system_bh_wq, &mantis->bh_work);
 	}
 	if (stat & MANTIS_INT_I2CDONE) {
 		dprintk(MANTIS_DEBUG, 0, "<%s>", label[9]);
diff --git a/drivers/media/pci/mantis/mantis_common.h b/drivers/media/pci/mantis/mantis_common.h
index d88ac280226c..6e563ecd94e8 100644
--- a/drivers/media/pci/mantis/mantis_common.h
+++ b/drivers/media/pci/mantis/mantis_common.h
@@ -125,7 +125,7 @@ struct mantis_pci {
 	__le32			*risc_cpu;
 	dma_addr_t		risc_dma;
 
-	struct tasklet_struct	tasklet;
+	struct work_struct	bh_work;
 	spinlock_t		intmask_lock;
 
 	struct i2c_adapter	adapter;
diff --git a/drivers/media/pci/mantis/mantis_dma.c b/drivers/media/pci/mantis/mantis_dma.c
index 80c843936493..eeb210a2862f 100644
--- a/drivers/media/pci/mantis/mantis_dma.c
+++ b/drivers/media/pci/mantis/mantis_dma.c
@@ -200,9 +200,9 @@ void mantis_dma_stop(struct mantis_pci *mantis)
 }
 
 
-void mantis_dma_xfer(struct tasklet_struct *t)
+void mantis_dma_xfer(struct work_struct *t)
 {
-	struct mantis_pci *mantis = from_tasklet(mantis, t, tasklet);
+	struct mantis_pci *mantis = from_work(mantis, t, bh_work);
 	struct mantis_hwconfig *config = mantis->hwconfig;
 
 	while (mantis->last_block != mantis->busy_block) {
diff --git a/drivers/media/pci/mantis/mantis_dma.h b/drivers/media/pci/mantis/mantis_dma.h
index 37da982c9c29..5db0d3728f15 100644
--- a/drivers/media/pci/mantis/mantis_dma.h
+++ b/drivers/media/pci/mantis/mantis_dma.h
@@ -13,6 +13,6 @@ extern int mantis_dma_init(struct mantis_pci *mantis);
 extern int mantis_dma_exit(struct mantis_pci *mantis);
 extern void mantis_dma_start(struct mantis_pci *mantis);
 extern void mantis_dma_stop(struct mantis_pci *mantis);
-extern void mantis_dma_xfer(struct tasklet_struct *t);
+extern void mantis_dma_xfer(struct work_struct *t);
 
 #endif /* __MANTIS_DMA_H */
diff --git a/drivers/media/pci/mantis/mantis_dvb.c b/drivers/media/pci/mantis/mantis_dvb.c
index c7ba4a76e608..398e32f44692 100644
--- a/drivers/media/pci/mantis/mantis_dvb.c
+++ b/drivers/media/pci/mantis/mantis_dvb.c
@@ -105,7 +105,7 @@ static int mantis_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
 	if (mantis->feeds == 1)	 {
 		dprintk(MANTIS_DEBUG, 1, "mantis start feed & dma");
 		mantis_dma_start(mantis);
-		tasklet_enable(&mantis->tasklet);
+		enable_and_queue_work(system_bh_wq, &mantis->bh_work);
 	}
 
 	return mantis->feeds;
@@ -125,7 +125,7 @@ static int mantis_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
 	mantis->feeds--;
 	if (mantis->feeds == 0) {
 		dprintk(MANTIS_DEBUG, 1, "mantis stop feed and dma");
-		tasklet_disable(&mantis->tasklet);
+		disable_work_sync(&mantis->bh_work);
 		mantis_dma_stop(mantis);
 	}
 
@@ -205,8 +205,8 @@ int mantis_dvb_init(struct mantis_pci *mantis)
 	}
 
 	dvb_net_init(&mantis->dvb_adapter, &mantis->dvbnet, &mantis->demux.dmx);
-	tasklet_setup(&mantis->tasklet, mantis_dma_xfer);
-	tasklet_disable(&mantis->tasklet);
+	INIT_WORK(&mantis->bh_work, mantis_dma_xfer);
+	disable_work_sync(&mantis->bh_work);
 	if (mantis->hwconfig) {
 		result = config->frontend_init(mantis, mantis->fe);
 		if (result < 0) {
@@ -235,7 +235,7 @@ int mantis_dvb_init(struct mantis_pci *mantis)
 
 	/* Error conditions ..	*/
 err5:
-	tasklet_kill(&mantis->tasklet);
+	cancel_work_sync(&mantis->bh_work);
 	dvb_net_release(&mantis->dvbnet);
 	if (mantis->fe) {
 		dvb_unregister_frontend(mantis->fe);
@@ -273,7 +273,7 @@ int mantis_dvb_exit(struct mantis_pci *mantis)
 		dvb_frontend_detach(mantis->fe);
 	}
 
-	tasklet_kill(&mantis->tasklet);
+	cancel_work_sync(&mantis->bh_work);
 	dvb_net_release(&mantis->dvbnet);
 
 	mantis->demux.dmx.remove_frontend(&mantis->demux.dmx, &mantis->fe_mem);
diff --git a/drivers/media/pci/ngene/ngene-core.c b/drivers/media/pci/ngene/ngene-core.c
index 24ec576dc3bf..db6796240bce 100644
--- a/drivers/media/pci/ngene/ngene-core.c
+++ b/drivers/media/pci/ngene/ngene-core.c
@@ -50,9 +50,9 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 /* nGene interrupt handler **************************************************/
 /****************************************************************************/
 
-static void event_tasklet(struct tasklet_struct *t)
+static void event_bh_work(struct work_struct *t)
 {
-	struct ngene *dev = from_tasklet(dev, t, event_tasklet);
+	struct ngene *dev = from_work(dev, t, event_bh_work);
 
 	while (dev->EventQueueReadIndex != dev->EventQueueWriteIndex) {
 		struct EVENT_BUFFER Event =
@@ -68,9 +68,9 @@ static void event_tasklet(struct tasklet_struct *t)
 	}
 }
 
-static void demux_tasklet(struct tasklet_struct *t)
+static void demux_bh_work(struct work_struct *t)
 {
-	struct ngene_channel *chan = from_tasklet(chan, t, demux_tasklet);
+	struct ngene_channel *chan = from_work(chan, t, demux_bh_work);
 	struct device *pdev = &chan->dev->pci_dev->dev;
 	struct SBufferHeader *Cur = chan->nextBuffer;
 
@@ -204,7 +204,7 @@ static irqreturn_t irq_handler(int irq, void *dev_id)
 			dev->EventQueueOverflowFlag = 1;
 		}
 		dev->EventBuffer->EventStatus &= ~0x80;
-		tasklet_schedule(&dev->event_tasklet);
+		queue_work(system_bh_wq, &dev->event_bh_work);
 		rc = IRQ_HANDLED;
 	}
 
@@ -217,8 +217,8 @@ static irqreturn_t irq_handler(int irq, void *dev_id)
 			     ngeneBuffer.SR.Flags & 0xC0) == 0x80) {
 				dev->channel[i].nextBuffer->
 					ngeneBuffer.SR.Flags |= 0x40;
-				tasklet_schedule(
-					&dev->channel[i].demux_tasklet);
+				queue_work(system_bh_wq,
+					   &dev->channel[i].demux_bh_work);
 				rc = IRQ_HANDLED;
 			}
 		}
@@ -1181,7 +1181,7 @@ static void ngene_init(struct ngene *dev)
 	struct device *pdev = &dev->pci_dev->dev;
 	int i;
 
-	tasklet_setup(&dev->event_tasklet, event_tasklet);
+	INIT_WORK(&dev->event_bh_work, event_bh_work);
 
 	memset_io(dev->iomem + 0xc000, 0x00, 0x220);
 	memset_io(dev->iomem + 0xc400, 0x00, 0x100);
@@ -1395,7 +1395,7 @@ static void release_channel(struct ngene_channel *chan)
 	if (chan->running)
 		set_transfer(chan, 0);
 
-	tasklet_kill(&chan->demux_tasklet);
+	cancel_work_sync(&chan->demux_bh_work);
 
 	if (chan->ci_dev) {
 		dvb_unregister_device(chan->ci_dev);
@@ -1445,7 +1445,7 @@ static int init_channel(struct ngene_channel *chan)
 	struct ngene_info *ni = dev->card_info;
 	int io = ni->io_type[nr];
 
-	tasklet_setup(&chan->demux_tasklet, demux_tasklet);
+	INIT_WORK(&chan->demux_bh_work, demux_bh_work);
 	chan->users = 0;
 	chan->type = io;
 	chan->mode = chan->type;	/* for now only one mode */
@@ -1649,7 +1649,7 @@ void ngene_remove(struct pci_dev *pdev)
 	struct ngene *dev = pci_get_drvdata(pdev);
 	int i;
 
-	tasklet_kill(&dev->event_tasklet);
+	cancel_work_sync(&dev->event_bh_work);
 	for (i = MAX_STREAM - 1; i >= 0; i--)
 		release_channel(&dev->channel[i]);
 	if (dev->ci.en)
diff --git a/drivers/media/pci/ngene/ngene.h b/drivers/media/pci/ngene/ngene.h
index d1d7da84cd9d..9f989420b9e7 100644
--- a/drivers/media/pci/ngene/ngene.h
+++ b/drivers/media/pci/ngene/ngene.h
@@ -16,6 +16,7 @@
 #include <linux/scatterlist.h>
 
 #include <linux/dvb/frontend.h>
+#include <linux/workqueue.h>
 
 #include <media/dmxdev.h>
 #include <media/dvbdev.h>
@@ -621,7 +622,7 @@ struct ngene_channel {
 	int                   users;
 	struct video_device  *v4l_dev;
 	struct dvb_device    *ci_dev;
-	struct tasklet_struct demux_tasklet;
+	struct work_struct    demux_bh_work;
 
 	struct SBufferHeader *nextBuffer;
 	enum KSSTATE          State;
@@ -717,7 +718,7 @@ struct ngene {
 	struct EVENT_BUFFER   EventQueue[EVENT_QUEUE_SIZE];
 	int                   EventQueueOverflowCount;
 	int                   EventQueueOverflowFlag;
-	struct tasklet_struct event_tasklet;
+	struct work_struct    event_bh_work;
 	struct EVENT_BUFFER  *EventBuffer;
 	int                   EventQueueWriteIndex;
 	int                   EventQueueReadIndex;
diff --git a/drivers/media/pci/smipcie/smipcie-main.c b/drivers/media/pci/smipcie/smipcie-main.c
index 0c300d019d9c..7db6d443fc54 100644
--- a/drivers/media/pci/smipcie/smipcie-main.c
+++ b/drivers/media/pci/smipcie/smipcie-main.c
@@ -279,10 +279,10 @@ static void smi_port_clearInterrupt(struct smi_port *port)
 		(port->_dmaInterruptCH0 | port->_dmaInterruptCH1));
 }
 
-/* tasklet handler: DMA data to dmx.*/
-static void smi_dma_xfer(struct tasklet_struct *t)
+/* BH work handler: DMA data to dmx.*/
+static void smi_dma_xfer(struct work_struct *t)
 {
-	struct smi_port *port = from_tasklet(port, t, tasklet);
+	struct smi_port *port = from_work(port, t, bh_work);
 	struct smi_dev *dev = port->dev;
 	u32 intr_status, finishedData, dmaManagement;
 	u8 dmaChan0State, dmaChan1State;
@@ -426,8 +426,8 @@ static int smi_port_init(struct smi_port *port, int dmaChanUsed)
 	}
 
 	smi_port_disableInterrupt(port);
-	tasklet_setup(&port->tasklet, smi_dma_xfer);
-	tasklet_disable(&port->tasklet);
+	INIT_WORK(&port->bh_work, smi_dma_xfer);
+	disable_work_sync(&port->bh_work);
 	port->enable = 1;
 	return 0;
 err:
@@ -438,7 +438,7 @@ err:
 static void smi_port_exit(struct smi_port *port)
 {
 	smi_port_disableInterrupt(port);
-	tasklet_kill(&port->tasklet);
+	cancel_work_sync(&port->bh_work);
 	smi_port_dma_free(port);
 	port->enable = 0;
 }
@@ -452,7 +452,7 @@ static int smi_port_irq(struct smi_port *port, u32 int_status)
 		smi_port_disableInterrupt(port);
 		port->_int_status = int_status;
 		smi_port_clearInterrupt(port);
-		tasklet_schedule(&port->tasklet);
+		queue_work(system_bh_wq, &port->bh_work);
 		handled = 1;
 	}
 	return handled;
@@ -823,7 +823,7 @@ static int smi_start_feed(struct dvb_demux_feed *dvbdmxfeed)
 		smi_port_clearInterrupt(port);
 		smi_port_enableInterrupt(port);
 		smi_write(port->DMA_MANAGEMENT, dmaManagement);
-		tasklet_enable(&port->tasklet);
+		enable_and_queue_work(system_bh_wq, &port->bh_work);
 	}
 	return port->users;
 }
@@ -837,7 +837,7 @@ static int smi_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
 	if (--port->users)
 		return port->users;
 
-	tasklet_disable(&port->tasklet);
+	disable_work_sync(&port->bh_work);
 	smi_port_disableInterrupt(port);
 	smi_clear(port->DMA_MANAGEMENT, 0x30003);
 	return 0;
diff --git a/drivers/media/pci/smipcie/smipcie.h b/drivers/media/pci/smipcie/smipcie.h
index 2b5e0154814c..98e44edaab9e 100644
--- a/drivers/media/pci/smipcie/smipcie.h
+++ b/drivers/media/pci/smipcie/smipcie.h
@@ -17,6 +17,7 @@
 #include <linux/pci.h>
 #include <linux/dma-mapping.h>
 #include <linux/slab.h>
+#include <linux/workqueue.h>
 #include <media/rc-core.h>
 
 #include <media/demux.h>
@@ -257,7 +258,7 @@ struct smi_port {
 	u32 _dmaInterruptCH0;
 	u32 _dmaInterruptCH1;
 	u32 _int_status;
-	struct tasklet_struct tasklet;
+	struct work_struct bh_work;
 	/* dvb */
 	struct dmx_frontend hw_frontend;
 	struct dmx_frontend mem_frontend;
diff --git a/drivers/media/pci/ttpci/budget-av.c b/drivers/media/pci/ttpci/budget-av.c
index 2e62c938e2cb..69f5e810f9b5 100644
--- a/drivers/media/pci/ttpci/budget-av.c
+++ b/drivers/media/pci/ttpci/budget-av.c
@@ -36,6 +36,7 @@
 #include <linux/interrupt.h>
 #include <linux/input.h>
 #include <linux/spinlock.h>
+#include <linux/workqueue.h>
 
 #include <media/dvb_ca_en50221.h>
 
@@ -54,7 +55,7 @@ struct budget_av {
 	struct video_device vd;
 	int cur_input;
 	int has_saa7113;
-	struct tasklet_struct ciintf_irq_tasklet;
+	struct work_struct ciintf_irq_bh_work;
 	int slot_status;
 	struct dvb_ca_en50221 ca;
 	u8 reinitialise_demod:1;
diff --git a/drivers/media/pci/ttpci/budget-ci.c b/drivers/media/pci/ttpci/budget-ci.c
index 76de40e3c802..33f08adf4feb 100644
--- a/drivers/media/pci/ttpci/budget-ci.c
+++ b/drivers/media/pci/ttpci/budget-ci.c
@@ -18,6 +18,7 @@
 #include <linux/slab.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
+#include <linux/workqueue.h>
 #include <media/rc-core.h>
 
 #include "budget.h"
@@ -81,7 +82,7 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 
 struct budget_ci_ir {
 	struct rc_dev *dev;
-	struct tasklet_struct msp430_irq_tasklet;
+	struct work_struct msp430_irq_bh_work;
 	char name[72]; /* 40 + 32 for (struct saa7146_dev).name */
 	char phys[32];
 	int rc5_device;
@@ -92,7 +93,7 @@ struct budget_ci_ir {
 
 struct budget_ci {
 	struct budget budget;
-	struct tasklet_struct ciintf_irq_tasklet;
+	struct work_struct ciintf_irq_bh_work;
 	int slot_status;
 	int ci_irq;
 	struct dvb_ca_en50221 ca;
@@ -100,9 +101,9 @@ struct budget_ci {
 	u8 tuner_pll_address; /* used for philips_tdm1316l configs */
 };
 
-static void msp430_ir_interrupt(struct tasklet_struct *t)
+static void msp430_ir_interrupt(struct work_struct *t)
 {
-	struct budget_ci_ir *ir = from_tasklet(ir, t, msp430_irq_tasklet);
+	struct budget_ci_ir *ir = from_work(ir, t, msp430_irq_bh_work);
 	struct budget_ci *budget_ci = container_of(ir, typeof(*budget_ci), ir);
 	struct rc_dev *dev = budget_ci->ir.dev;
 	u32 command = ttpci_budget_debiread(&budget_ci->budget, DEBINOSWAP, DEBIADDR_IR, 2, 1, 0) >> 8;
@@ -231,7 +232,7 @@ static int msp430_ir_init(struct budget_ci *budget_ci)
 
 	budget_ci->ir.dev = dev;
 
-	tasklet_setup(&budget_ci->ir.msp430_irq_tasklet, msp430_ir_interrupt);
+	INIT_WORK(&budget_ci->ir.msp430_irq_bh_work, msp430_ir_interrupt);
 
 	SAA7146_IER_ENABLE(saa, MASK_06);
 	saa7146_setgpio(saa, 3, SAA7146_GPIO_IRQHI);
@@ -245,7 +246,7 @@ static void msp430_ir_deinit(struct budget_ci *budget_ci)
 
 	SAA7146_IER_DISABLE(saa, MASK_06);
 	saa7146_setgpio(saa, 3, SAA7146_GPIO_INPUT);
-	tasklet_kill(&budget_ci->ir.msp430_irq_tasklet);
+	cancel_work_sync(&budget_ci->ir.msp430_irq_bh_work);
 
 	rc_unregister_device(budget_ci->ir.dev);
 }
@@ -349,10 +350,10 @@ static int ciintf_slot_ts_enable(struct dvb_ca_en50221 *ca, int slot)
 	return 0;
 }
 
-static void ciintf_interrupt(struct tasklet_struct *t)
+static void ciintf_interrupt(struct work_struct *t)
 {
-	struct budget_ci *budget_ci = from_tasklet(budget_ci, t,
-						   ciintf_irq_tasklet);
+	struct budget_ci *budget_ci = from_work(budget_ci, t,
+						   ciintf_irq_bh_work);
 	struct saa7146_dev *saa = budget_ci->budget.dev;
 	unsigned int flags;
 
@@ -491,7 +492,7 @@ static int ciintf_init(struct budget_ci *budget_ci)
 
 	// Setup CI slot IRQ
 	if (budget_ci->ci_irq) {
-		tasklet_setup(&budget_ci->ciintf_irq_tasklet, ciintf_interrupt);
+		INIT_WORK(&budget_ci->ciintf_irq_bh_work, ciintf_interrupt);
 		if (budget_ci->slot_status != SLOTSTATUS_NONE)
 			saa7146_setgpio(saa, 0, SAA7146_GPIO_IRQLO);
 		else
@@ -530,7 +531,7 @@ static void ciintf_deinit(struct budget_ci *budget_ci)
 	if (budget_ci->ci_irq) {
 		SAA7146_IER_DISABLE(saa, MASK_03);
 		saa7146_setgpio(saa, 0, SAA7146_GPIO_INPUT);
-		tasklet_kill(&budget_ci->ciintf_irq_tasklet);
+		cancel_work_sync(&budget_ci->ciintf_irq_bh_work);
 	}
 
 	// reset interface
@@ -556,13 +557,13 @@ static void budget_ci_irq(struct saa7146_dev *dev, u32 *isr)
 	dprintk(8, "dev: %p, budget_ci: %p\n", dev, budget_ci);
 
 	if (*isr & MASK_06)
-		tasklet_schedule(&budget_ci->ir.msp430_irq_tasklet);
+		queue_work(system_bh_wq, &budget_ci->ir.msp430_irq_bh_work);
 
 	if (*isr & MASK_10)
 		ttpci_budget_irq10_handler(dev, isr);
 
 	if ((*isr & MASK_03) && (budget_ci->budget.ci_present) && (budget_ci->ci_irq))
-		tasklet_schedule(&budget_ci->ciintf_irq_tasklet);
+		queue_work(system_bh_wq, &budget_ci->ciintf_irq_bh_work);
 }
 
 static u8 philips_su1278_tt_inittab[] = {
diff --git a/drivers/media/pci/ttpci/budget-core.c b/drivers/media/pci/ttpci/budget-core.c
index 6d41fc997655..29531d9c9db0 100644
--- a/drivers/media/pci/ttpci/budget-core.c
+++ b/drivers/media/pci/ttpci/budget-core.c
@@ -172,9 +172,9 @@ static int budget_read_fe_status(struct dvb_frontend *fe,
 	return ret;
 }
 
-static void vpeirq(struct tasklet_struct *t)
+static void vpeirq(struct work_struct *t)
 {
-	struct budget *budget = from_tasklet(budget, t, vpe_tasklet);
+	struct budget *budget = from_work(budget, t, vpe_bh_work);
 	u8 *mem = (u8 *) (budget->grabbing);
 	u32 olddma = budget->ttbp;
 	u32 newdma = saa7146_read(budget->dev, PCI_VDP3);
@@ -525,7 +525,7 @@ int ttpci_budget_init(struct budget *budget, struct saa7146_dev *dev,
 	/* upload all */
 	saa7146_write(dev, GPIO_CTRL, 0x000000);
 
-	tasklet_setup(&budget->vpe_tasklet, vpeirq);
+	INIT_WORK(&budget->vpe_bh_work, vpeirq);
 
 	/* frontend power on */
 	if (bi->type != BUDGET_FS_ACTIVY)
@@ -565,7 +565,7 @@ int ttpci_budget_deinit(struct budget *budget)
 
 	budget_unregister(budget);
 
-	tasklet_kill(&budget->vpe_tasklet);
+	cancel_work_sync(&budget->vpe_bh_work);
 
 	saa7146_vfree_destroy_pgtable(dev->pci, budget->grabbing, &budget->pt);
 
@@ -584,7 +584,7 @@ void ttpci_budget_irq10_handler(struct saa7146_dev *dev, u32 *isr)
 	dprintk(8, "dev: %p, budget: %p\n", dev, budget);
 
 	if (*isr & MASK_10)
-		tasklet_schedule(&budget->vpe_tasklet);
+		queue_work(system_bh_wq, &budget->vpe_bh_work);
 }
 EXPORT_SYMBOL_GPL(ttpci_budget_irq10_handler);
 
diff --git a/drivers/media/pci/ttpci/budget.h b/drivers/media/pci/ttpci/budget.h
index 83ead34dc766..e933764ac4e3 100644
--- a/drivers/media/pci/ttpci/budget.h
+++ b/drivers/media/pci/ttpci/budget.h
@@ -18,6 +18,7 @@
 
 #include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/workqueue.h>
 
 #include <media/drv-intf/saa7146.h>
 
@@ -54,8 +55,8 @@ struct budget {
 	unsigned char *grabbing;
 	struct saa7146_pgtable pt;
 
-	struct tasklet_struct fidb_tasklet;
-	struct tasklet_struct vpe_tasklet;
+	struct work_struct fidb_bh_work;
+	struct work_struct vpe_bh_work;
 
 	struct dmxdev dmxdev;
 	struct dvb_demux demux;
diff --git a/drivers/media/pci/tw5864/tw5864-core.c b/drivers/media/pci/tw5864/tw5864-core.c
index 560ff1ddcc83..4d33caf83307 100644
--- a/drivers/media/pci/tw5864/tw5864-core.c
+++ b/drivers/media/pci/tw5864/tw5864-core.c
@@ -144,7 +144,7 @@ static void tw5864_h264_isr(struct tw5864_dev *dev)
 		cur_frame->gop_seqno = input->frame_gop_seqno;
 
 		dev->h264_buf_w_index = next_frame_index;
-		tasklet_schedule(&dev->tasklet);
+		queue_work(system_bh_wq, &dev->bh_work);
 
 		cur_frame = next_frame;
 
diff --git a/drivers/media/pci/tw5864/tw5864-video.c b/drivers/media/pci/tw5864/tw5864-video.c
index 8b1aae4b6319..4f35c159efe5 100644
--- a/drivers/media/pci/tw5864/tw5864-video.c
+++ b/drivers/media/pci/tw5864/tw5864-video.c
@@ -6,6 +6,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/workqueue.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-event.h>
 #include <media/videobuf2-dma-contig.h>
@@ -175,7 +176,7 @@ static const unsigned int intra4x4_lambda3[] = {
 static v4l2_std_id tw5864_get_v4l2_std(enum tw5864_vid_std std);
 static enum tw5864_vid_std tw5864_from_v4l2_std(v4l2_std_id v4l2_std);
 
-static void tw5864_handle_frame_task(struct tasklet_struct *t);
+static void tw5864_handle_frame_work(struct work_struct *t);
 static void tw5864_handle_frame(struct tw5864_h264_frame *frame);
 static void tw5864_frame_interval_set(struct tw5864_input *input);
 
@@ -1062,7 +1063,7 @@ int tw5864_video_init(struct tw5864_dev *dev, int *video_nr)
 	dev->irqmask |= TW5864_INTR_VLC_DONE | TW5864_INTR_TIMER;
 	tw5864_irqmask_apply(dev);
 
-	tasklet_setup(&dev->tasklet, tw5864_handle_frame_task);
+	INIT_WORK(&dev->bh_work, tw5864_handle_frame_work);
 
 	for (i = 0; i < TW5864_INPUTS; i++) {
 		dev->inputs[i].root = dev;
@@ -1079,7 +1080,7 @@ fini_video_inputs:
 	for (i = last_input_nr_registered; i >= 0; i--)
 		tw5864_video_input_fini(&dev->inputs[i]);
 
-	tasklet_kill(&dev->tasklet);
+	cancel_work_sync(&dev->bh_work);
 
 free_dma:
 	for (i = last_dma_allocated; i >= 0; i--) {
@@ -1198,7 +1199,7 @@ void tw5864_video_fini(struct tw5864_dev *dev)
 {
 	int i;
 
-	tasklet_kill(&dev->tasklet);
+	cancel_work_sync(&dev->bh_work);
 
 	for (i = 0; i < TW5864_INPUTS; i++)
 		tw5864_video_input_fini(&dev->inputs[i]);
@@ -1315,9 +1316,9 @@ static int tw5864_is_motion_triggered(struct tw5864_h264_frame *frame)
 	return detected;
 }
 
-static void tw5864_handle_frame_task(struct tasklet_struct *t)
+static void tw5864_handle_frame_work(struct work_struct *t)
 {
-	struct tw5864_dev *dev = from_tasklet(dev, t, tasklet);
+	struct tw5864_dev *dev = from_work(dev, t, bh_work);
 	unsigned long flags;
 	int batch_size = H264_BUF_CNT;
 
diff --git a/drivers/media/pci/tw5864/tw5864.h b/drivers/media/pci/tw5864/tw5864.h
index a8b6fbd5b710..2da5f4215fd9 100644
--- a/drivers/media/pci/tw5864/tw5864.h
+++ b/drivers/media/pci/tw5864/tw5864.h
@@ -12,6 +12,7 @@
 #include <linux/mutex.h>
 #include <linux/io.h>
 #include <linux/interrupt.h>
+#include <linux/workqueue.h>
 
 #include <media/v4l2-common.h>
 #include <media/v4l2-ioctl.h>
@@ -85,7 +86,7 @@ struct tw5864_input {
 	int nr; /* input number */
 	struct tw5864_dev *root;
 	struct mutex lock; /* used for vidq and vdev */
-	spinlock_t slock; /* used for sync between ISR, tasklet & V4L2 API */
+	spinlock_t slock; /* used for sync between ISR, bh_work & V4L2 API */
 	struct video_device vdev;
 	struct v4l2_ctrl_handler hdl;
 	struct vb2_queue vidq;
@@ -142,7 +143,7 @@ struct tw5864_h264_frame {
 
 /* global device status */
 struct tw5864_dev {
-	spinlock_t slock; /* used for sync between ISR, tasklet & V4L2 API */
+	spinlock_t slock; /* used for sync between ISR, bh_work & V4L2 API */
 	struct v4l2_device v4l2_dev;
 	struct tw5864_input inputs[TW5864_INPUTS];
 #define H264_BUF_CNT 4
@@ -150,7 +151,7 @@ struct tw5864_dev {
 	int h264_buf_r_index;
 	int h264_buf_w_index;
 
-	struct tasklet_struct tasklet;
+	struct work_struct bh_work;
 
 	int encoder_busy;
 	/* Input number to check next for ready raw picture (in RR fashion) */