Merge tag 'v4.10-rc6' into devel

Linux 4.10-rc6

Resolved conflicts in:
	drivers/pinctrl/pinctrl-amd.c
	drivers/pinctrl/samsung/pinctrl-exynos.c

9 files changed, 188 insertions, 172 deletions

diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c
index 0ea4efb3de66..ebb5e391b800 100644
--- a/drivers/media/cec/cec-adap.c
+++ b/drivers/media/cec/cec-adap.c
@@ -30,8 +30,9 @@
 
 #include "cec-priv.h"
 
-static int cec_report_features(struct cec_adapter *adap, unsigned int la_idx);
-static int cec_report_phys_addr(struct cec_adapter *adap, unsigned int la_idx);
+static void cec_fill_msg_report_features(struct cec_adapter *adap,
+					 struct cec_msg *msg,
+					 unsigned int la_idx);
 
 /*
  * 400 ms is the time it takes for one 16 byte message to be
@@ -288,10 +289,10 @@ static void cec_data_cancel(struct cec_data *data)
 
 	/* Mark it as an error */
 	data->msg.tx_ts = ktime_get_ns();
-	data->msg.tx_status = CEC_TX_STATUS_ERROR |
-			      CEC_TX_STATUS_MAX_RETRIES;
+	data->msg.tx_status |= CEC_TX_STATUS_ERROR |
+			       CEC_TX_STATUS_MAX_RETRIES;
+	data->msg.tx_error_cnt++;
 	data->attempts = 0;
-	data->msg.tx_error_cnt = 1;
 	/* Queue transmitted message for monitoring purposes */
 	cec_queue_msg_monitor(data->adap, &data->msg, 1);
 
@@ -851,7 +852,7 @@ static const u8 cec_msg_size[256] = {
 	[CEC_MSG_REQUEST_ARC_TERMINATION] = 2 | DIRECTED,
 	[CEC_MSG_TERMINATE_ARC] = 2 | DIRECTED,
 	[CEC_MSG_REQUEST_CURRENT_LATENCY] = 4 | BCAST,
-	[CEC_MSG_REPORT_CURRENT_LATENCY] = 7 | BCAST,
+	[CEC_MSG_REPORT_CURRENT_LATENCY] = 6 | BCAST,
 	[CEC_MSG_CDC_MESSAGE] = 2 | BCAST,
 };
 
@@ -1250,30 +1251,49 @@ configured:
 		for (i = 1; i < las->num_log_addrs; i++)
 			las->log_addr[i] = CEC_LOG_ADDR_INVALID;
 	}
+	for (i = las->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++)
+		las->log_addr[i] = CEC_LOG_ADDR_INVALID;
 	adap->is_configured = true;
 	adap->is_configuring = false;
 	cec_post_state_event(adap);
-	mutex_unlock(&adap->lock);
 
+	/*
+	 * Now post the Report Features and Report Physical Address broadcast
+	 * messages. Note that these are non-blocking transmits, meaning that
+	 * they are just queued up and once adap->lock is unlocked the main
+	 * thread will kick in and start transmitting these.
+	 *
+	 * If after this function is done (but before one or more of these
+	 * messages are actually transmitted) the CEC adapter is unconfigured,
+	 * then any remaining messages will be dropped by the main thread.
+	 */
 	for (i = 0; i < las->num_log_addrs; i++) {
+		struct cec_msg msg = {};
+
 		if (las->log_addr[i] == CEC_LOG_ADDR_INVALID ||
 		    (las->flags & CEC_LOG_ADDRS_FL_CDC_ONLY))
 			continue;
 
-		/*
-		 * Report Features must come first according
-		 * to CEC 2.0
-		 */
-		if (las->log_addr[i] != CEC_LOG_ADDR_UNREGISTERED)
-			cec_report_features(adap, i);
-		cec_report_phys_addr(adap, i);
+		msg.msg[0] = (las->log_addr[i] << 4) | 0x0f;
+
+		/* Report Features must come first according to CEC 2.0 */
+		if (las->log_addr[i] != CEC_LOG_ADDR_UNREGISTERED &&
+		    adap->log_addrs.cec_version >= CEC_OP_CEC_VERSION_2_0) {
+			cec_fill_msg_report_features(adap, &msg, i);
+			cec_transmit_msg_fh(adap, &msg, NULL, false);
+		}
+
+		/* Report Physical Address */
+		cec_msg_report_physical_addr(&msg, adap->phys_addr,
+					     las->primary_device_type[i]);
+		dprintk(2, "config: la %d pa %x.%x.%x.%x\n",
+			las->log_addr[i],
+			cec_phys_addr_exp(adap->phys_addr));
+		cec_transmit_msg_fh(adap, &msg, NULL, false);
 	}
-	for (i = las->num_log_addrs; i < CEC_MAX_LOG_ADDRS; i++)
-		las->log_addr[i] = CEC_LOG_ADDR_INVALID;
-	mutex_lock(&adap->lock);
 	adap->kthread_config = NULL;
-	mutex_unlock(&adap->lock);
 	complete(&adap->config_completion);
+	mutex_unlock(&adap->lock);
 	return 0;
 
 unconfigure:
@@ -1526,52 +1546,32 @@ EXPORT_SYMBOL_GPL(cec_s_log_addrs);
 
 /* High-level core CEC message handling */
 
-/* Transmit the Report Features message */
-static int cec_report_features(struct cec_adapter *adap, unsigned int la_idx)
+/* Fill in the Report Features message */
+static void cec_fill_msg_report_features(struct cec_adapter *adap,
+					 struct cec_msg *msg,
+					 unsigned int la_idx)
 {
-	struct cec_msg msg = { };
 	const struct cec_log_addrs *las = &adap->log_addrs;
 	const u8 *features = las->features[la_idx];
 	bool op_is_dev_features = false;
 	unsigned int idx;
 
-	/* This is 2.0 and up only */
-	if (adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0)
-		return 0;
-
 	/* Report Features */
-	msg.msg[0] = (las->log_addr[la_idx] << 4) | 0x0f;
-	msg.len = 4;
-	msg.msg[1] = CEC_MSG_REPORT_FEATURES;
-	msg.msg[2] = adap->log_addrs.cec_version;
-	msg.msg[3] = las->all_device_types[la_idx];
+	msg->msg[0] = (las->log_addr[la_idx] << 4) | 0x0f;
+	msg->len = 4;
+	msg->msg[1] = CEC_MSG_REPORT_FEATURES;
+	msg->msg[2] = adap->log_addrs.cec_version;
+	msg->msg[3] = las->all_device_types[la_idx];
 
 	/* Write RC Profiles first, then Device Features */
 	for (idx = 0; idx < ARRAY_SIZE(las->features[0]); idx++) {
-		msg.msg[msg.len++] = features[idx];
+		msg->msg[msg->len++] = features[idx];
 		if ((features[idx] & CEC_OP_FEAT_EXT) == 0) {
 			if (op_is_dev_features)
 				break;
 			op_is_dev_features = true;
 		}
 	}
-	return cec_transmit_msg(adap, &msg, false);
-}
-
-/* Transmit the Report Physical Address message */
-static int cec_report_phys_addr(struct cec_adapter *adap, unsigned int la_idx)
-{
-	const struct cec_log_addrs *las = &adap->log_addrs;
-	struct cec_msg msg = { };
-
-	/* Report Physical Address */
-	msg.msg[0] = (las->log_addr[la_idx] << 4) | 0x0f;
-	cec_msg_report_physical_addr(&msg, adap->phys_addr,
-				     las->primary_device_type[la_idx]);
-	dprintk(2, "config: la %d pa %x.%x.%x.%x\n",
-		las->log_addr[la_idx],
-			cec_phys_addr_exp(adap->phys_addr));
-	return cec_transmit_msg(adap, &msg, false);
 }
 
 /* Transmit the Feature Abort message */
@@ -1777,9 +1777,10 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
 	}
 
 	case CEC_MSG_GIVE_FEATURES:
-		if (adap->log_addrs.cec_version >= CEC_OP_CEC_VERSION_2_0)
-			return cec_report_features(adap, la_idx);
-		return 0;
+		if (adap->log_addrs.cec_version < CEC_OP_CEC_VERSION_2_0)
+			return cec_feature_abort(adap, msg);
+		cec_fill_msg_report_features(adap, &tx_cec_msg, la_idx);
+		return cec_transmit_msg(adap, &tx_cec_msg, false);
 
 	default:
 		/*
diff --git a/drivers/media/dvb-core/dvb_net.c b/drivers/media/dvb-core/dvb_net.c
index bc5e8cfe7ca2..8f11d7e45993 100644
--- a/drivers/media/dvb-core/dvb_net.c
+++ b/drivers/media/dvb-core/dvb_net.c
@@ -719,6 +719,9 @@ static void dvb_net_ule_check_crc(struct dvb_net_ule_handle *h,
 		skb_copy_from_linear_data(h->priv->ule_skb, dest_addr,
 					  ETH_ALEN);
 		skb_pull(h->priv->ule_skb, ETH_ALEN);
+	} else {
+		/* dest_addr buffer is only valid if h->priv->ule_dbit == 0 */
+		eth_zero_addr(dest_addr);
 	}
 
 	/* Handle ULE Extension Headers. */
@@ -750,16 +753,8 @@ static void dvb_net_ule_check_crc(struct dvb_net_ule_handle *h,
 	if (!h->priv->ule_bridged) {
 		skb_push(h->priv->ule_skb, ETH_HLEN);
 		h->ethh = (struct ethhdr *)h->priv->ule_skb->data;
-		if (!h->priv->ule_dbit) {
-			/*
-			 * dest_addr buffer is only valid if
-			 * h->priv->ule_dbit == 0
-			 */
-			memcpy(h->ethh->h_dest, dest_addr, ETH_ALEN);
-			eth_zero_addr(h->ethh->h_source);
-		} else /* zeroize source and dest */
-			memset(h->ethh, 0, ETH_ALEN * 2);
-
+		memcpy(h->ethh->h_dest, dest_addr, ETH_ALEN);
+		eth_zero_addr(h->ethh->h_source);
 		h->ethh->h_proto = htons(h->priv->ule_sndu_type);
 	}
 	/* else:  skb is in correct state; nothing to do. */
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index b31fa6fae009..b979ea148251 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -655,6 +655,7 @@ config VIDEO_S5K6A3
 config VIDEO_S5K4ECGX
         tristate "Samsung S5K4ECGX sensor support"
         depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+	select CRC32
         ---help---
           This is a V4L2 sensor-level driver for Samsung S5K4ECGX 5M
           camera sensor with an embedded SoC image signal processor.
diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c
index 59872b31f832..f4e92bdfe192 100644
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -2741,9 +2741,7 @@ static const struct v4l2_subdev_internal_ops smiapp_internal_ops = {
  * I2C Driver
  */
 
-#ifdef CONFIG_PM
-
-static int smiapp_suspend(struct device *dev)
+static int __maybe_unused smiapp_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
@@ -2768,7 +2766,7 @@ static int smiapp_suspend(struct device *dev)
 	return 0;
 }
 
-static int smiapp_resume(struct device *dev)
+static int __maybe_unused smiapp_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
@@ -2783,13 +2781,6 @@ static int smiapp_resume(struct device *dev)
 	return rval;
 }
 
-#else
-
-#define smiapp_suspend	NULL
-#define smiapp_resume	NULL
-
-#endif /* CONFIG_PM */
-
 static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev)
 {
 	struct smiapp_hwconfig *hwcfg;
@@ -2913,13 +2904,9 @@ static int smiapp_probe(struct i2c_client *client,
 	if (IS_ERR(sensor->xshutdown))
 		return PTR_ERR(sensor->xshutdown);
 
-	pm_runtime_enable(&client->dev);
-
-	rval = pm_runtime_get_sync(&client->dev);
-	if (rval < 0) {
-		rval = -ENODEV;
-		goto out_power_off;
-	}
+	rval = smiapp_power_on(&client->dev);
+	if (rval < 0)
+		return rval;
 
 	rval = smiapp_identify_module(sensor);
 	if (rval) {
@@ -3100,6 +3087,9 @@ static int smiapp_probe(struct i2c_client *client,
 	if (rval < 0)
 		goto out_media_entity_cleanup;
 
+	pm_runtime_set_active(&client->dev);
+	pm_runtime_get_noresume(&client->dev);
+	pm_runtime_enable(&client->dev);
 	pm_runtime_set_autosuspend_delay(&client->dev, 1000);
 	pm_runtime_use_autosuspend(&client->dev);
 	pm_runtime_put_autosuspend(&client->dev);
@@ -3113,8 +3103,7 @@ out_cleanup:
 	smiapp_cleanup(sensor);
 
 out_power_off:
-	pm_runtime_put(&client->dev);
-	pm_runtime_disable(&client->dev);
+	smiapp_power_off(&client->dev);
 
 	return rval;
 }
@@ -3127,8 +3116,10 @@ static int smiapp_remove(struct i2c_client *client)
 
 	v4l2_async_unregister_subdev(subdev);
 
-	pm_runtime_suspend(&client->dev);
 	pm_runtime_disable(&client->dev);
+	if (!pm_runtime_status_suspended(&client->dev))
+		smiapp_power_off(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
 
 	for (i = 0; i < sensor->ssds_used; i++) {
 		v4l2_device_unregister_subdev(&sensor->ssds[i].sd);
diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
index 3a0fe8cc64e9..48646a7f3fb0 100644
--- a/drivers/media/i2c/tvp5150.c
+++ b/drivers/media/i2c/tvp5150.c
@@ -291,8 +291,12 @@ static void tvp5150_selmux(struct v4l2_subdev *sd)
 	tvp5150_write(sd, TVP5150_OP_MODE_CTL, opmode);
 	tvp5150_write(sd, TVP5150_VD_IN_SRC_SEL_1, input);
 
-	/* Svideo should enable YCrCb output and disable GPCL output
-	 * For Composite and TV, it should be the reverse
+	/*
+	 * Setup the FID/GLCO/VLK/HVLK and INTREQ/GPCL/VBLK output signals. For
+	 * S-Video we output the vertical lock (VLK) signal on FID/GLCO/VLK/HVLK
+	 * and set INTREQ/GPCL/VBLK to logic 0. For composite we output the
+	 * field indicator (FID) signal on FID/GLCO/VLK/HVLK and set
+	 * INTREQ/GPCL/VBLK to logic 1.
 	 */
 	val = tvp5150_read(sd, TVP5150_MISC_CTL);
 	if (val < 0) {
@@ -301,9 +305,9 @@ static void tvp5150_selmux(struct v4l2_subdev *sd)
 	}
 
 	if (decoder->input == TVP5150_SVIDEO)
-		val = (val & ~0x40) | 0x10;
+		val = (val & ~TVP5150_MISC_CTL_GPCL) | TVP5150_MISC_CTL_HVLK;
 	else
-		val = (val & ~0x10) | 0x40;
+		val = (val & ~TVP5150_MISC_CTL_HVLK) | TVP5150_MISC_CTL_GPCL;
 	tvp5150_write(sd, TVP5150_MISC_CTL, val);
 };
 
@@ -455,7 +459,12 @@ static const struct i2c_reg_value tvp5150_init_enable[] = {
 	},{	/* Automatic offset and AGC enabled */
 		TVP5150_ANAL_CHL_CTL, 0x15
 	},{	/* Activate YCrCb output 0x9 or 0xd ? */
-		TVP5150_MISC_CTL, 0x6f
+		TVP5150_MISC_CTL, TVP5150_MISC_CTL_GPCL |
+				  TVP5150_MISC_CTL_INTREQ_OE |
+				  TVP5150_MISC_CTL_YCBCR_OE |
+				  TVP5150_MISC_CTL_SYNC_OE |
+				  TVP5150_MISC_CTL_VBLANK |
+				  TVP5150_MISC_CTL_CLOCK_OE,
 	},{	/* Activates video std autodetection for all standards */
 		TVP5150_AUTOSW_MSK, 0x0
 	},{	/* Default format: 0x47. For 4:2:2: 0x40 */
@@ -861,8 +870,6 @@ static int tvp5150_fill_fmt(struct v4l2_subdev *sd,
 
 	f = &format->format;
 
-	tvp5150_reset(sd, 0);
-
 	f->width = decoder->rect.width;
 	f->height = decoder->rect.height / 2;
 
@@ -1051,21 +1058,27 @@ static const struct media_entity_operations tvp5150_sd_media_ops = {
 static int tvp5150_s_stream(struct v4l2_subdev *sd, int enable)
 {
 	struct tvp5150 *decoder = to_tvp5150(sd);
-	/* Output format: 8-bit ITU-R BT.656 with embedded syncs */
-	int val = 0x09;
-
-	/* Output format: 8-bit 4:2:2 YUV with discrete sync */
-	if (decoder->mbus_type == V4L2_MBUS_PARALLEL)
-		val = 0x0d;
+	int val;
 
-	/* Initializes TVP5150 to its default values */
-	/* # set PCLK (27MHz) */
-	tvp5150_write(sd, TVP5150_CONF_SHARED_PIN, 0x00);
+	/* Enable or disable the video output signals. */
+	val = tvp5150_read(sd, TVP5150_MISC_CTL);
+	if (val < 0)
+		return val;
+
+	val &= ~(TVP5150_MISC_CTL_YCBCR_OE | TVP5150_MISC_CTL_SYNC_OE |
+		 TVP5150_MISC_CTL_CLOCK_OE);
+
+	if (enable) {
+		/*
+		 * Enable the YCbCr and clock outputs. In discrete sync mode
+		 * (non-BT.656) additionally enable the the sync outputs.
+		 */
+		val |= TVP5150_MISC_CTL_YCBCR_OE | TVP5150_MISC_CTL_CLOCK_OE;
+		if (decoder->mbus_type == V4L2_MBUS_PARALLEL)
+			val |= TVP5150_MISC_CTL_SYNC_OE;
+	}
 
-	if (enable)
-		tvp5150_write(sd, TVP5150_MISC_CTL, val);
-	else
-		tvp5150_write(sd, TVP5150_MISC_CTL, 0x00);
+	tvp5150_write(sd, TVP5150_MISC_CTL, val);
 
 	return 0;
 }
@@ -1524,7 +1537,6 @@ static int tvp5150_probe(struct i2c_client *c,
 		res = core->hdl.error;
 		goto err;
 	}
-	v4l2_ctrl_handler_setup(&core->hdl);
 
 	/* Default is no cropping */
 	core->rect.top = 0;
@@ -1535,6 +1547,8 @@ static int tvp5150_probe(struct i2c_client *c,
 	core->rect.left = 0;
 	core->rect.width = TVP5150_H_MAX;
 
+	tvp5150_reset(sd, 0);	/* Calls v4l2_ctrl_handler_setup() */
+
 	res = v4l2_async_register_subdev(sd);
 	if (res < 0)
 		goto err;
diff --git a/drivers/media/i2c/tvp5150_reg.h b/drivers/media/i2c/tvp5150_reg.h
index 25a994944918..30a48c28d05a 100644
--- a/drivers/media/i2c/tvp5150_reg.h
+++ b/drivers/media/i2c/tvp5150_reg.h
@@ -9,6 +9,15 @@
 #define TVP5150_ANAL_CHL_CTL         0x01 /* Analog channel controls */
 #define TVP5150_OP_MODE_CTL          0x02 /* Operation mode controls */
 #define TVP5150_MISC_CTL             0x03 /* Miscellaneous controls */
+#define TVP5150_MISC_CTL_VBLK_GPCL	BIT(7)
+#define TVP5150_MISC_CTL_GPCL		BIT(6)
+#define TVP5150_MISC_CTL_INTREQ_OE	BIT(5)
+#define TVP5150_MISC_CTL_HVLK		BIT(4)
+#define TVP5150_MISC_CTL_YCBCR_OE	BIT(3)
+#define TVP5150_MISC_CTL_SYNC_OE	BIT(2)
+#define TVP5150_MISC_CTL_VBLANK		BIT(1)
+#define TVP5150_MISC_CTL_CLOCK_OE	BIT(0)
+
 #define TVP5150_AUTOSW_MSK           0x04 /* Autoswitch mask: TVP5150A / TVP5150AM */
 
 /* Reserved 05h */
diff --git a/drivers/media/pci/cobalt/cobalt-driver.c b/drivers/media/pci/cobalt/cobalt-driver.c
index 979634000597..d5c911c09e2b 100644
--- a/drivers/media/pci/cobalt/cobalt-driver.c
+++ b/drivers/media/pci/cobalt/cobalt-driver.c
@@ -308,9 +308,7 @@ static void cobalt_pci_iounmap(struct cobalt *cobalt, struct pci_dev *pci_dev)
 static void cobalt_free_msi(struct cobalt *cobalt, struct pci_dev *pci_dev)
 {
 	free_irq(pci_dev->irq, (void *)cobalt);
-
-	if (cobalt->msi_enabled)
-		pci_disable_msi(pci_dev);
+	pci_free_irq_vectors(pci_dev);
 }
 
 static int cobalt_setup_pci(struct cobalt *cobalt, struct pci_dev *pci_dev,
@@ -387,14 +385,12 @@ static int cobalt_setup_pci(struct cobalt *cobalt, struct pci_dev *pci_dev,
 	   from being generated. */
 	cobalt_set_interrupt(cobalt, false);
 
-	if (pci_enable_msi_range(pci_dev, 1, 1) < 1) {
+	if (pci_alloc_irq_vectors(pci_dev, 1, 1, PCI_IRQ_MSI) < 1) {
 		cobalt_err("Could not enable MSI\n");
-		cobalt->msi_enabled = false;
 		ret = -EIO;
 		goto err_release;
 	}
 	msi_config_show(cobalt, pci_dev);
-	cobalt->msi_enabled = true;
 
 	/* Register IRQ */
 	if (request_irq(pci_dev->irq, cobalt_irq_handler, IRQF_SHARED,
diff --git a/drivers/media/pci/cobalt/cobalt-driver.h b/drivers/media/pci/cobalt/cobalt-driver.h
index ed00dc9d9399..00f773ec359a 100644
--- a/drivers/media/pci/cobalt/cobalt-driver.h
+++ b/drivers/media/pci/cobalt/cobalt-driver.h
@@ -287,8 +287,6 @@ struct cobalt {
 	u32 irq_none;
 	u32 irq_full_fifo;
 
-	bool msi_enabled;
-
 	/* omnitek dma */
 	int dma_channels;
 	int first_fifo_channel;
diff --git a/drivers/media/usb/dvb-usb/pctv452e.c b/drivers/media/usb/dvb-usb/pctv452e.c
index 07fa08be9e99..d54ebe7e0215 100644
--- a/drivers/media/usb/dvb-usb/pctv452e.c
+++ b/drivers/media/usb/dvb-usb/pctv452e.c
@@ -97,14 +97,13 @@ struct pctv452e_state {
 	u8 c;	   /* transaction counter, wraps around...  */
 	u8 initialized; /* set to 1 if 0x15 has been sent */
 	u16 last_rc_key;
-
-	unsigned char data[80];
 };
 
 static int tt3650_ci_msg(struct dvb_usb_device *d, u8 cmd, u8 *data,
 			 unsigned int write_len, unsigned int read_len)
 {
 	struct pctv452e_state *state = (struct pctv452e_state *)d->priv;
+	u8 *buf;
 	u8 id;
 	unsigned int rlen;
 	int ret;
@@ -114,36 +113,39 @@ static int tt3650_ci_msg(struct dvb_usb_device *d, u8 cmd, u8 *data,
 		return -EIO;
 	}
 
-	mutex_lock(&state->ca_mutex);
+	buf = kmalloc(64, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
 	id = state->c++;
 
-	state->data[0] = SYNC_BYTE_OUT;
-	state->data[1] = id;
-	state->data[2] = cmd;
-	state->data[3] = write_len;
+	buf[0] = SYNC_BYTE_OUT;
+	buf[1] = id;
+	buf[2] = cmd;
+	buf[3] = write_len;
 
-	memcpy(state->data + 4, data, write_len);
+	memcpy(buf + 4, data, write_len);
 
 	rlen = (read_len > 0) ? 64 : 0;
-	ret = dvb_usb_generic_rw(d, state->data, 4 + write_len,
-				  state->data, rlen, /* delay_ms */ 0);
+	ret = dvb_usb_generic_rw(d, buf, 4 + write_len,
+				  buf, rlen, /* delay_ms */ 0);
 	if (0 != ret)
 		goto failed;
 
 	ret = -EIO;
-	if (SYNC_BYTE_IN != state->data[0] || id != state->data[1])
+	if (SYNC_BYTE_IN != buf[0] || id != buf[1])
 		goto failed;
 
-	memcpy(data, state->data + 4, read_len);
+	memcpy(data, buf + 4, read_len);
 
-	mutex_unlock(&state->ca_mutex);
+	kfree(buf);
 	return 0;
 
 failed:
 	err("CI error %d; %02X %02X %02X -> %*ph.",
-	     ret, SYNC_BYTE_OUT, id, cmd, 3, state->data);
+	     ret, SYNC_BYTE_OUT, id, cmd, 3, buf);
 
-	mutex_unlock(&state->ca_mutex);
+	kfree(buf);
 	return ret;
 }
 
@@ -410,53 +412,57 @@ static int pctv452e_i2c_msg(struct dvb_usb_device *d, u8 addr,
 				u8 *rcv_buf, u8 rcv_len)
 {
 	struct pctv452e_state *state = (struct pctv452e_state *)d->priv;
+	u8 *buf;
 	u8 id;
 	int ret;
 
-	mutex_lock(&state->ca_mutex);
+	buf = kmalloc(64, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
 	id = state->c++;
 
 	ret = -EINVAL;
 	if (snd_len > 64 - 7 || rcv_len > 64 - 7)
 		goto failed;
 
-	state->data[0] = SYNC_BYTE_OUT;
-	state->data[1] = id;
-	state->data[2] = PCTV_CMD_I2C;
-	state->data[3] = snd_len + 3;
-	state->data[4] = addr << 1;
-	state->data[5] = snd_len;
-	state->data[6] = rcv_len;
+	buf[0] = SYNC_BYTE_OUT;
+	buf[1] = id;
+	buf[2] = PCTV_CMD_I2C;
+	buf[3] = snd_len + 3;
+	buf[4] = addr << 1;
+	buf[5] = snd_len;
+	buf[6] = rcv_len;
 
-	memcpy(state->data + 7, snd_buf, snd_len);
+	memcpy(buf + 7, snd_buf, snd_len);
 
-	ret = dvb_usb_generic_rw(d, state->data, 7 + snd_len,
-				  state->data, /* rcv_len */ 64,
+	ret = dvb_usb_generic_rw(d, buf, 7 + snd_len,
+				  buf, /* rcv_len */ 64,
 				  /* delay_ms */ 0);
 	if (ret < 0)
 		goto failed;
 
 	/* TT USB protocol error. */
 	ret = -EIO;
-	if (SYNC_BYTE_IN != state->data[0] || id != state->data[1])
+	if (SYNC_BYTE_IN != buf[0] || id != buf[1])
 		goto failed;
 
 	/* I2C device didn't respond as expected. */
 	ret = -EREMOTEIO;
-	if (state->data[5] < snd_len || state->data[6] < rcv_len)
+	if (buf[5] < snd_len || buf[6] < rcv_len)
 		goto failed;
 
-	memcpy(rcv_buf, state->data + 7, rcv_len);
-	mutex_unlock(&state->ca_mutex);
+	memcpy(rcv_buf, buf + 7, rcv_len);
 
+	kfree(buf);
 	return rcv_len;
 
 failed:
 	err("I2C error %d; %02X %02X  %02X %02X %02X -> %*ph",
 	     ret, SYNC_BYTE_OUT, id, addr << 1, snd_len, rcv_len,
-	     7, state->data);
+	     7, buf);
 
-	mutex_unlock(&state->ca_mutex);
+	kfree(buf);
 	return ret;
 }
 
@@ -505,7 +511,7 @@ static u32 pctv452e_i2c_func(struct i2c_adapter *adapter)
 static int pctv452e_power_ctrl(struct dvb_usb_device *d, int i)
 {
 	struct pctv452e_state *state = (struct pctv452e_state *)d->priv;
-	u8 *rx;
+	u8 *b0, *rx;
 	int ret;
 
 	info("%s: %d\n", __func__, i);
@@ -516,11 +522,12 @@ static int pctv452e_power_ctrl(struct dvb_usb_device *d, int i)
 	if (state->initialized)
 		return 0;
 
-	rx = kmalloc(PCTV_ANSWER_LEN, GFP_KERNEL);
-	if (!rx)
+	b0 = kmalloc(5 + PCTV_ANSWER_LEN, GFP_KERNEL);
+	if (!b0)
 		return -ENOMEM;
 
-	mutex_lock(&state->ca_mutex);
+	rx = b0 + 5;
+
 	/* hmm where shoud this should go? */
 	ret = usb_set_interface(d->udev, 0, ISOC_INTERFACE_ALTERNATIVE);
 	if (ret != 0)
@@ -528,66 +535,70 @@ static int pctv452e_power_ctrl(struct dvb_usb_device *d, int i)
 			__func__, ret);
 
 	/* this is a one-time initialization, dont know where to put */
-	state->data[0] = 0xaa;
-	state->data[1] = state->c++;
-	state->data[2] = PCTV_CMD_RESET;
-	state->data[3] = 1;
-	state->data[4] = 0;
+	b0[0] = 0xaa;
+	b0[1] = state->c++;
+	b0[2] = PCTV_CMD_RESET;
+	b0[3] = 1;
+	b0[4] = 0;
 	/* reset board */
-	ret = dvb_usb_generic_rw(d, state->data, 5, rx, PCTV_ANSWER_LEN, 0);
+	ret = dvb_usb_generic_rw(d, b0, 5, rx, PCTV_ANSWER_LEN, 0);
 	if (ret)
 		goto ret;
 
-	state->data[1] = state->c++;
-	state->data[4] = 1;
+	b0[1] = state->c++;
+	b0[4] = 1;
 	/* reset board (again?) */
-	ret = dvb_usb_generic_rw(d, state->data, 5, rx, PCTV_ANSWER_LEN, 0);
+	ret = dvb_usb_generic_rw(d, b0, 5, rx, PCTV_ANSWER_LEN, 0);
 	if (ret)
 		goto ret;
 
 	state->initialized = 1;
 
 ret:
-	mutex_unlock(&state->ca_mutex);
-	kfree(rx);
+	kfree(b0);
 	return ret;
 }
 
 static int pctv452e_rc_query(struct dvb_usb_device *d)
 {
 	struct pctv452e_state *state = (struct pctv452e_state *)d->priv;
+	u8 *b, *rx;
 	int ret, i;
 	u8 id;
 
-	mutex_lock(&state->ca_mutex);
+	b = kmalloc(CMD_BUFFER_SIZE + PCTV_ANSWER_LEN, GFP_KERNEL);
+	if (!b)
+		return -ENOMEM;
+
+	rx = b + CMD_BUFFER_SIZE;
+
 	id = state->c++;
 
 	/* prepare command header  */
-	state->data[0] = SYNC_BYTE_OUT;
-	state->data[1] = id;
-	state->data[2] = PCTV_CMD_IR;
-	state->data[3] = 0;
+	b[0] = SYNC_BYTE_OUT;
+	b[1] = id;
+	b[2] = PCTV_CMD_IR;
+	b[3] = 0;
 
 	/* send ir request */
-	ret = dvb_usb_generic_rw(d, state->data, 4,
-				 state->data, PCTV_ANSWER_LEN, 0);
+	ret = dvb_usb_generic_rw(d, b, 4, rx, PCTV_ANSWER_LEN, 0);
 	if (ret != 0)
 		goto ret;
 
 	if (debug > 3) {
-		info("%s: read: %2d: %*ph: ", __func__, ret, 3, state->data);
-		for (i = 0; (i < state->data[3]) && ((i + 3) < PCTV_ANSWER_LEN); i++)
-			info(" %02x", state->data[i + 3]);
+		info("%s: read: %2d: %*ph: ", __func__, ret, 3, rx);
+		for (i = 0; (i < rx[3]) && ((i+3) < PCTV_ANSWER_LEN); i++)
+			info(" %02x", rx[i+3]);
 
 		info("\n");
 	}
 
-	if ((state->data[3] == 9) &&  (state->data[12] & 0x01)) {
+	if ((rx[3] == 9) &&  (rx[12] & 0x01)) {
 		/* got a "press" event */
-		state->last_rc_key = RC_SCANCODE_RC5(state->data[7], state->data[6]);
+		state->last_rc_key = RC_SCANCODE_RC5(rx[7], rx[6]);
 		if (debug > 2)
 			info("%s: cmd=0x%02x sys=0x%02x\n",
-				__func__, state->data[6], state->data[7]);
+				__func__, rx[6], rx[7]);
 
 		rc_keydown(d->rc_dev, RC_TYPE_RC5, state->last_rc_key, 0);
 	} else if (state->last_rc_key) {
@@ -595,7 +606,7 @@ static int pctv452e_rc_query(struct dvb_usb_device *d)
 		state->last_rc_key = 0;
 	}
 ret:
-	mutex_unlock(&state->ca_mutex);
+	kfree(b);
 	return ret;
 }