1 files changed, 124 insertions, 123 deletions

diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c
index 144f3f55d76..d244e1a83f4 100644
--- a/drivers/media/rc/nuvoton-cir.c
+++ b/drivers/media/rc/nuvoton-cir.c
@@ -25,6 +25,8 @@
  * USA
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pnp.h>
@@ -123,43 +125,40 @@ static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset)
 	return val;
 }
 
-#define pr_reg(text, ...) \
-	printk(KERN_INFO KBUILD_MODNAME ": " text, ## __VA_ARGS__)
-
 /* dump current cir register contents */
 static void cir_dump_regs(struct nvt_dev *nvt)
 {
 	nvt_efm_enable(nvt);
 	nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR);
 
-	pr_reg("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME);
-	pr_reg(" * CR CIR ACTIVE :   0x%x\n",
-	       nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
-	pr_reg(" * CR CIR BASE ADDR: 0x%x\n",
-	       (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
+	pr_info("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME);
+	pr_info(" * CR CIR ACTIVE :   0x%x\n",
+		nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
+	pr_info(" * CR CIR BASE ADDR: 0x%x\n",
+		(nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
 		nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO));
-	pr_reg(" * CR CIR IRQ NUM:   0x%x\n",
-	       nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
+	pr_info(" * CR CIR IRQ NUM:   0x%x\n",
+		nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
 
 	nvt_efm_disable(nvt);
 
-	pr_reg("%s: Dump CIR registers:\n", NVT_DRIVER_NAME);
-	pr_reg(" * IRCON:     0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON));
-	pr_reg(" * IRSTS:     0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS));
-	pr_reg(" * IREN:      0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN));
-	pr_reg(" * RXFCONT:   0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT));
-	pr_reg(" * CP:        0x%x\n", nvt_cir_reg_read(nvt, CIR_CP));
-	pr_reg(" * CC:        0x%x\n", nvt_cir_reg_read(nvt, CIR_CC));
-	pr_reg(" * SLCH:      0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH));
-	pr_reg(" * SLCL:      0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL));
-	pr_reg(" * FIFOCON:   0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON));
-	pr_reg(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS));
-	pr_reg(" * SRXFIFO:   0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO));
-	pr_reg(" * TXFCONT:   0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT));
-	pr_reg(" * STXFIFO:   0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO));
-	pr_reg(" * FCCH:      0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH));
-	pr_reg(" * FCCL:      0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL));
-	pr_reg(" * IRFSM:     0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM));
+	pr_info("%s: Dump CIR registers:\n", NVT_DRIVER_NAME);
+	pr_info(" * IRCON:     0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON));
+	pr_info(" * IRSTS:     0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS));
+	pr_info(" * IREN:      0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN));
+	pr_info(" * RXFCONT:   0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT));
+	pr_info(" * CP:        0x%x\n", nvt_cir_reg_read(nvt, CIR_CP));
+	pr_info(" * CC:        0x%x\n", nvt_cir_reg_read(nvt, CIR_CC));
+	pr_info(" * SLCH:      0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH));
+	pr_info(" * SLCL:      0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL));
+	pr_info(" * FIFOCON:   0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON));
+	pr_info(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS));
+	pr_info(" * SRXFIFO:   0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO));
+	pr_info(" * TXFCONT:   0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT));
+	pr_info(" * STXFIFO:   0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO));
+	pr_info(" * FCCH:      0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH));
+	pr_info(" * FCCL:      0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL));
+	pr_info(" * IRFSM:     0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM));
 }
 
 /* dump current cir wake register contents */
@@ -170,59 +169,59 @@ static void cir_wake_dump_regs(struct nvt_dev *nvt)
 	nvt_efm_enable(nvt);
 	nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
 
-	pr_reg("%s: Dump CIR WAKE logical device registers:\n",
-	       NVT_DRIVER_NAME);
-	pr_reg(" * CR CIR WAKE ACTIVE :   0x%x\n",
-	       nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
-	pr_reg(" * CR CIR WAKE BASE ADDR: 0x%x\n",
-	       (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
+	pr_info("%s: Dump CIR WAKE logical device registers:\n",
+		NVT_DRIVER_NAME);
+	pr_info(" * CR CIR WAKE ACTIVE :   0x%x\n",
+		nvt_cr_read(nvt, CR_LOGICAL_DEV_EN));
+	pr_info(" * CR CIR WAKE BASE ADDR: 0x%x\n",
+		(nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) |
 		nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO));
-	pr_reg(" * CR CIR WAKE IRQ NUM:   0x%x\n",
-	       nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
+	pr_info(" * CR CIR WAKE IRQ NUM:   0x%x\n",
+		nvt_cr_read(nvt, CR_CIR_IRQ_RSRC));
 
 	nvt_efm_disable(nvt);
 
-	pr_reg("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME);
-	pr_reg(" * IRCON:          0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON));
-	pr_reg(" * IRSTS:          0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS));
-	pr_reg(" * IREN:           0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN));
-	pr_reg(" * FIFO CMP DEEP:  0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP));
-	pr_reg(" * FIFO CMP TOL:   0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL));
-	pr_reg(" * FIFO COUNT:     0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT));
-	pr_reg(" * SLCH:           0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH));
-	pr_reg(" * SLCL:           0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL));
-	pr_reg(" * FIFOCON:        0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON));
-	pr_reg(" * SRXFSTS:        0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS));
-	pr_reg(" * SAMPLE RX FIFO: 0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO));
-	pr_reg(" * WR FIFO DATA:   0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA));
-	pr_reg(" * RD FIFO ONLY:   0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
-	pr_reg(" * RD FIFO ONLY IDX: 0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX));
-	pr_reg(" * FIFO IGNORE:    0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE));
-	pr_reg(" * IRFSM:          0x%x\n",
-	       nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRFSM));
+	pr_info("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME);
+	pr_info(" * IRCON:          0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON));
+	pr_info(" * IRSTS:          0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS));
+	pr_info(" * IREN:           0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN));
+	pr_info(" * FIFO CMP DEEP:  0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP));
+	pr_info(" * FIFO CMP TOL:   0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL));
+	pr_info(" * FIFO COUNT:     0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT));
+	pr_info(" * SLCH:           0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH));
+	pr_info(" * SLCL:           0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL));
+	pr_info(" * FIFOCON:        0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON));
+	pr_info(" * SRXFSTS:        0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS));
+	pr_info(" * SAMPLE RX FIFO: 0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO));
+	pr_info(" * WR FIFO DATA:   0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA));
+	pr_info(" * RD FIFO ONLY:   0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
+	pr_info(" * RD FIFO ONLY IDX: 0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX));
+	pr_info(" * FIFO IGNORE:    0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE));
+	pr_info(" * IRFSM:          0x%x\n",
+		nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRFSM));
 
 	fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT);
-	pr_reg("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len);
-	pr_reg("* Contents = ");
+	pr_info("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len);
+	pr_info("* Contents =");
 	for (i = 0; i < fifo_len; i++)
-		printk(KERN_CONT "%02x ",
-		       nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
-	printk(KERN_CONT "\n");
+		pr_cont(" %02x",
+			nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY));
+	pr_cont("\n");
 }
 
 /* detect hardware features */
@@ -331,9 +330,6 @@ static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt)
 	/* Enable CIR Wake via PSOUT# (Pin60) */
 	nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
 
-	/* enable cir interrupt of mouse/keyboard IRQ event */
-	nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS);
-
 	/* enable pme interrupt of cir wakeup event */
 	nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
 
@@ -457,7 +453,6 @@ static void nvt_enable_wake(struct nvt_dev *nvt)
 
 	nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI);
 	nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE);
-	nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS);
 	nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2);
 
 	nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE);
@@ -473,6 +468,7 @@ static void nvt_enable_wake(struct nvt_dev *nvt)
 	nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
 }
 
+#if 0 /* Currently unused */
 /* rx carrier detect only works in learning mode, must be called w/nvt_lock */
 static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt)
 {
@@ -505,7 +501,7 @@ static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt)
 
 	return carrier;
 }
-
+#endif
 /*
  * set carrier frequency
  *
@@ -518,6 +514,9 @@ static int nvt_set_tx_carrier(struct rc_dev *dev, u32 carrier)
 	struct nvt_dev *nvt = dev->priv;
 	u16 val;
 
+	if (carrier == 0)
+		return -EINVAL;
+
 	nvt_cir_reg_write(nvt, 1, CIR_CP);
 	val = 3000000 / (carrier) - 1;
 	nvt_cir_reg_write(nvt, val & 0xff, CIR_CC);
@@ -618,7 +617,6 @@ static void nvt_dump_rx_buf(struct nvt_dev *nvt)
 static void nvt_process_rx_ir_data(struct nvt_dev *nvt)
 {
 	DEFINE_IR_RAW_EVENT(rawir);
-	u32 carrier;
 	u8 sample;
 	int i;
 
@@ -627,9 +625,6 @@ static void nvt_process_rx_ir_data(struct nvt_dev *nvt)
 	if (debug)
 		nvt_dump_rx_buf(nvt);
 
-	if (nvt->carrier_detect_enabled)
-		carrier = nvt_rx_carrier_detect(nvt);
-
 	nvt_dbg_verbose("Processing buffer of len %d", nvt->pkts);
 
 	init_ir_raw_event(&rawir);
@@ -987,25 +982,31 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
 	/* input device for IR remote (and tx) */
 	rdev = rc_allocate_device();
 	if (!rdev)
-		goto failure;
+		goto exit_free_dev_rdev;
 
 	ret = -ENODEV;
+	/* activate pnp device */
+	if (pnp_activate_dev(pdev) < 0) {
+		dev_err(&pdev->dev, "Could not activate PNP device!\n");
+		goto exit_free_dev_rdev;
+	}
+
 	/* validate pnp resources */
 	if (!pnp_port_valid(pdev, 0) ||
 	    pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) {
 		dev_err(&pdev->dev, "IR PNP Port not valid!\n");
-		goto failure;
+		goto exit_free_dev_rdev;
 	}
 
 	if (!pnp_irq_valid(pdev, 0)) {
 		dev_err(&pdev->dev, "PNP IRQ not valid!\n");
-		goto failure;
+		goto exit_free_dev_rdev;
 	}
 
 	if (!pnp_port_valid(pdev, 1) ||
 	    pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) {
 		dev_err(&pdev->dev, "Wake PNP Port not valid!\n");
-		goto failure;
+		goto exit_free_dev_rdev;
 	}
 
 	nvt->cir_addr = pnp_port_start(pdev, 0);
@@ -1021,24 +1022,6 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
 	spin_lock_init(&nvt->nvt_lock);
 	spin_lock_init(&nvt->tx.lock);
 
-	ret = -EBUSY;
-	/* now claim resources */
-	if (!request_region(nvt->cir_addr,
-			    CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
-		goto failure;
-
-	if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED,
-			NVT_DRIVER_NAME, (void *)nvt))
-		goto failure;
-
-	if (!request_region(nvt->cir_wake_addr,
-			    CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
-		goto failure;
-
-	if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED,
-			NVT_DRIVER_NAME, (void *)nvt))
-		goto failure;
-
 	pnp_set_drvdata(pdev, nvt);
 	nvt->pdev = pdev;
 
@@ -1046,7 +1029,7 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
 
 	ret = nvt_hw_detect(nvt);
 	if (ret)
-		goto failure;
+		goto exit_free_dev_rdev;
 
 	/* Initialize CIR & CIR Wake Logical Devices */
 	nvt_efm_enable(nvt);
@@ -1061,7 +1044,7 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
 	/* Set up the rc device */
 	rdev->priv = nvt;
 	rdev->driver_type = RC_DRIVER_IR_RAW;
-	rdev->allowed_protos = RC_TYPE_ALL;
+	rc_set_allowed_protocols(rdev, RC_BIT_ALL);
 	rdev->open = nvt_open;
 	rdev->close = nvt_close;
 	rdev->tx_ir = nvt_tx_ir;
@@ -1084,13 +1067,32 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
 	/* tx bits */
 	rdev->tx_resolution = XYZ;
 #endif
+	nvt->rdev = rdev;
 
 	ret = rc_register_device(rdev);
 	if (ret)
-		goto failure;
+		goto exit_free_dev_rdev;
+
+	ret = -EBUSY;
+	/* now claim resources */
+	if (!request_region(nvt->cir_addr,
+			    CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
+		goto exit_unregister_device;
+
+	if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED,
+			NVT_DRIVER_NAME, (void *)nvt))
+		goto exit_release_cir_addr;
+
+	if (!request_region(nvt->cir_wake_addr,
+			    CIR_IOREG_LENGTH, NVT_DRIVER_NAME))
+		goto exit_free_irq;
+
+	if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED,
+			NVT_DRIVER_NAME, (void *)nvt))
+		goto exit_release_cir_wake_addr;
 
 	device_init_wakeup(&pdev->dev, true);
-	nvt->rdev = rdev;
+
 	nvt_pr(KERN_NOTICE, "driver has been successfully loaded\n");
 	if (debug) {
 		cir_dump_regs(nvt);
@@ -1099,24 +1101,23 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
 
 	return 0;
 
-failure:
-	if (nvt->cir_irq)
-		free_irq(nvt->cir_irq, nvt);
-	if (nvt->cir_addr)
-		release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
-
-	if (nvt->cir_wake_irq)
-		free_irq(nvt->cir_wake_irq, nvt);
-	if (nvt->cir_wake_addr)
-		release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
-
+exit_release_cir_wake_addr:
+	release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH);
+exit_free_irq:
+	free_irq(nvt->cir_irq, nvt);
+exit_release_cir_addr:
+	release_region(nvt->cir_addr, CIR_IOREG_LENGTH);
+exit_unregister_device:
+	rc_unregister_device(rdev);
+	rdev = NULL;
+exit_free_dev_rdev:
 	rc_free_device(rdev);
 	kfree(nvt);
 
 	return ret;
 }
 
-static void __devexit nvt_remove(struct pnp_dev *pdev)
+static void nvt_remove(struct pnp_dev *pdev)
 {
 	struct nvt_dev *nvt = pnp_get_drvdata(pdev);
 	unsigned long flags;
@@ -1214,18 +1215,18 @@ static struct pnp_driver nvt_driver = {
 	.id_table	= nvt_ids,
 	.flags		= PNP_DRIVER_RES_DO_NOT_CHANGE,
 	.probe		= nvt_probe,
-	.remove		= __devexit_p(nvt_remove),
+	.remove		= nvt_remove,
 	.suspend	= nvt_suspend,
 	.resume		= nvt_resume,
 	.shutdown	= nvt_shutdown,
 };
 
-int nvt_init(void)
+static int nvt_init(void)
 {
 	return pnp_register_driver(&nvt_driver);
 }
 
-void nvt_exit(void)
+static void nvt_exit(void)
 {
 	pnp_unregister_driver(&nvt_driver);
 }