Merge branch 'for-5.1/i2c-hid' into for-linus

Fix dmesg flood for Elan touchpanels which are too slow to assert IRQ from Kai-Heng Feng

Author: Jiri Kosina

drivers/hid/i2c-hid/i2c-hid-core.c

@@ -50,6 +50,7 @@
 #define I2C_HID_QUIRK_NO_IRQ_AFTER_RESET	BIT(1)
 #define I2C_HID_QUIRK_NO_RUNTIME_PM		BIT(2)
 #define I2C_HID_QUIRK_DELAY_AFTER_SLEEP		BIT(3)
+#define I2C_HID_QUIRK_BOGUS_IRQ			BIT(4)
 
 /* flags */
 #define I2C_HID_STARTED		0
@@ -181,6 +182,8 @@ static const struct i2c_hid_quirks {
 		I2C_HID_QUIRK_NO_RUNTIME_PM },
 	{ I2C_VENDOR_ID_GOODIX, I2C_DEVICE_ID_GOODIX_01F0,
 		I2C_HID_QUIRK_NO_RUNTIME_PM },
+	{ USB_VENDOR_ID_ELAN, HID_ANY_ID,
+		 I2C_HID_QUIRK_BOGUS_IRQ },
 	{ 0, 0 }
 };
 
@@ -505,6 +508,12 @@ static void i2c_hid_get_input(struct i2c_hid *ihid)
 		return;
 	}
 
+	if (ihid->quirks & I2C_HID_QUIRK_BOGUS_IRQ && ret_size == 0xffff) {
+		dev_warn_once(&ihid->client->dev, "%s: IRQ triggered but "
+			      "there's no data\n", __func__);
+		return;
+	}
+
 	if ((ret_size > size) || (ret_size < 2)) {
 		dev_err(&ihid->client->dev, "%s: incomplete report (%d/%d)\n",
 			__func__, size, ret_size);

drivers/hid/intel-ish-hid/ipc/ipc.c

@@ -259,33 +259,22 @@ static int write_ipc_from_queue(struct ishtp_device *dev)
 	int	i;
 	void	(*ipc_send_compl)(void *);
 	void	*ipc_send_compl_prm;
-	static int	out_ipc_locked;
-	unsigned long	out_ipc_flags;
 
 	if (dev->dev_state == ISHTP_DEV_DISABLED)
-		return	-EINVAL;
+		return -EINVAL;
 
-	spin_lock_irqsave(&dev->out_ipc_spinlock, out_ipc_flags);
-	if (out_ipc_locked) {
-		spin_unlock_irqrestore(&dev->out_ipc_spinlock, out_ipc_flags);
-		return -EBUSY;
-	}
-	out_ipc_locked = 1;
+	spin_lock_irqsave(&dev->wr_processing_spinlock, flags);
 	if (!ish_is_input_ready(dev)) {
-		out_ipc_locked = 0;
-		spin_unlock_irqrestore(&dev->out_ipc_spinlock, out_ipc_flags);
+		spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags);
 		return -EBUSY;
 	}
-	spin_unlock_irqrestore(&dev->out_ipc_spinlock, out_ipc_flags);
 
-	spin_lock_irqsave(&dev->wr_processing_spinlock, flags);
 	/*
 	 * if tx send list is empty - return 0;
 	 * may happen, as RX_COMPLETE handler doesn't check list emptiness.
 	 */
 	if (list_empty(&dev->wr_processing_list)) {
 		spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags);
-		out_ipc_locked = 0;
 		return	0;
 	}
 
@@ -328,16 +317,15 @@ static int write_ipc_from_queue(struct ishtp_device *dev)
 		memcpy(&reg, &r_buf[length >> 2], rem);
 		ish_reg_write(dev, reg_addr, reg);
 	}
+	ish_reg_write(dev, IPC_REG_HOST2ISH_DRBL, doorbell_val);
+
 	/* Flush writes to msg registers and doorbell */
 	ish_reg_read(dev, IPC_REG_ISH_HOST_FWSTS);
 
 	/* Update IPC counters */
 	++dev->ipc_tx_cnt;
 	dev->ipc_tx_bytes_cnt += IPC_HEADER_GET_LENGTH(doorbell_val);
 
-	ish_reg_write(dev, IPC_REG_HOST2ISH_DRBL, doorbell_val);
-	out_ipc_locked = 0;
-
 	ipc_send_compl = ipc_link->ipc_send_compl;
 	ipc_send_compl_prm = ipc_link->ipc_send_compl_prm;
 	list_del_init(&ipc_link->link);
@@ -917,7 +905,6 @@ struct ishtp_device *ish_dev_init(struct pci_dev *pdev)
 	init_waitqueue_head(&dev->wait_hw_ready);
 
 	spin_lock_init(&dev->wr_processing_spinlock);
-	spin_lock_init(&dev->out_ipc_spinlock);
 
 	/* Init IPC processing and free lists */
 	INIT_LIST_HEAD(&dev->wr_processing_list);

drivers/hid/intel-ish-hid/ishtp/bus.c

@@ -119,7 +119,7 @@ int ishtp_send_msg(struct ishtp_device *dev, struct ishtp_msg_hdr *hdr,
  * Return: This returns IPC send message status.
  */
 int ishtp_write_message(struct ishtp_device *dev, struct ishtp_msg_hdr *hdr,
-			unsigned char *buf)
+			void *buf)
 {
 	return ishtp_send_msg(dev, hdr, buf, NULL, NULL);
 }
@@ -672,7 +672,8 @@ int ishtp_cl_device_bind(struct ishtp_cl *cl)
 	spin_lock_irqsave(&cl->dev->device_list_lock, flags);
 	list_for_each_entry(cl_device, &cl->dev->device_list,
 			device_link) {
-		if (cl_device->fw_client->client_id == cl->fw_client_id) {
+		if (cl_device->fw_client &&
+		    cl_device->fw_client->client_id == cl->fw_client_id) {
 			cl->device = cl_device;
 			rv = 0;
 			break;
@@ -732,6 +733,7 @@ void ishtp_bus_remove_all_clients(struct ishtp_device *ishtp_dev,
 	spin_lock_irqsave(&ishtp_dev->device_list_lock, flags);
 	list_for_each_entry_safe(cl_device, n, &ishtp_dev->device_list,
 				 device_link) {
+		cl_device->fw_client = NULL;
 		if (warm_reset && cl_device->reference_count)
 			continue;
 

drivers/hid/intel-ish-hid/ishtp/bus.h

@@ -85,7 +85,7 @@ int	ishtp_send_msg(struct ishtp_device *dev,
 /* Write a single-fragment message */
 int	ishtp_write_message(struct ishtp_device *dev,
 			    struct ishtp_msg_hdr *hdr,
-			    unsigned char *buf);
+			    void *buf);
 
 /* Use DMA to send/receive messages */
 int ishtp_use_dma_transfer(void);

drivers/hid/intel-ish-hid/ishtp/hbm.c

@@ -136,27 +136,22 @@ int ishtp_hbm_start_wait(struct ishtp_device *dev)
 int ishtp_hbm_start_req(struct ishtp_device *dev)
 {
 	struct ishtp_msg_hdr hdr;
-	unsigned char data[128];
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
-	struct hbm_host_version_request *start_req;
-	const size_t len = sizeof(struct hbm_host_version_request);
+	struct hbm_host_version_request start_req = { 0 };
 
-	ishtp_hbm_hdr(ishtp_hdr, len);
+	ishtp_hbm_hdr(&hdr, sizeof(start_req));
 
 	/* host start message */
-	start_req = (struct hbm_host_version_request *)data;
-	memset(start_req, 0, len);
-	start_req->hbm_cmd = HOST_START_REQ_CMD;
-	start_req->host_version.major_version = HBM_MAJOR_VERSION;
-	start_req->host_version.minor_version = HBM_MINOR_VERSION;
+	start_req.hbm_cmd = HOST_START_REQ_CMD;
+	start_req.host_version.major_version = HBM_MAJOR_VERSION;
+	start_req.host_version.minor_version = HBM_MINOR_VERSION;
 
 	/*
 	 * (!) Response to HBM start may be so quick that this thread would get
 	 * preempted BEFORE managing to set hbm_state = ISHTP_HBM_START.
 	 * So set it at first, change back to ISHTP_HBM_IDLE upon failure
 	 */
 	dev->hbm_state = ISHTP_HBM_START;
-	if (ishtp_write_message(dev, ishtp_hdr, data)) {
+	if (ishtp_write_message(dev, &hdr, &start_req)) {
 		dev_err(dev->devc, "version message send failed\n");
 		dev->dev_state = ISHTP_DEV_RESETTING;
 		dev->hbm_state = ISHTP_HBM_IDLE;
@@ -178,19 +173,13 @@ int ishtp_hbm_start_req(struct ishtp_device *dev)
 void ishtp_hbm_enum_clients_req(struct ishtp_device *dev)
 {
 	struct ishtp_msg_hdr hdr;
-	unsigned char data[128];
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
-	struct hbm_host_enum_request *enum_req;
-	const size_t len = sizeof(struct hbm_host_enum_request);
+	struct hbm_host_enum_request enum_req = { 0 };
 
 	/* enumerate clients */
-	ishtp_hbm_hdr(ishtp_hdr, len);
+	ishtp_hbm_hdr(&hdr, sizeof(enum_req));
+	enum_req.hbm_cmd = HOST_ENUM_REQ_CMD;
 
-	enum_req = (struct hbm_host_enum_request *)data;
-	memset(enum_req, 0, len);
-	enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
-
-	if (ishtp_write_message(dev, ishtp_hdr, data)) {
+	if (ishtp_write_message(dev, &hdr, &enum_req)) {
 		dev->dev_state = ISHTP_DEV_RESETTING;
 		dev_err(dev->devc, "enumeration request send failed\n");
 		ish_hw_reset(dev);
@@ -208,12 +197,8 @@ void ishtp_hbm_enum_clients_req(struct ishtp_device *dev)
  */
 static int ishtp_hbm_prop_req(struct ishtp_device *dev)
 {
-
 	struct ishtp_msg_hdr hdr;
-	unsigned char data[128];
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
-	struct hbm_props_request *prop_req;
-	const size_t len = sizeof(struct hbm_props_request);
+	struct hbm_props_request prop_req = { 0 };
 	unsigned long next_client_index;
 	uint8_t client_num;
 
@@ -237,15 +222,12 @@ static int ishtp_hbm_prop_req(struct ishtp_device *dev)
 
 	dev->fw_clients[client_num].client_id = next_client_index;
 
-	ishtp_hbm_hdr(ishtp_hdr, len);
-	prop_req = (struct hbm_props_request *)data;
+	ishtp_hbm_hdr(&hdr, sizeof(prop_req));
 
-	memset(prop_req, 0, sizeof(struct hbm_props_request));
+	prop_req.hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
+	prop_req.address = next_client_index;
 
-	prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
-	prop_req->address = next_client_index;
-
-	if (ishtp_write_message(dev, ishtp_hdr, data)) {
+	if (ishtp_write_message(dev, &hdr, &prop_req)) {
 		dev->dev_state = ISHTP_DEV_RESETTING;
 		dev_err(dev->devc, "properties request send failed\n");
 		ish_hw_reset(dev);
@@ -266,19 +248,14 @@ static int ishtp_hbm_prop_req(struct ishtp_device *dev)
 static void ishtp_hbm_stop_req(struct ishtp_device *dev)
 {
 	struct ishtp_msg_hdr hdr;
-	unsigned char data[128];
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
-	struct hbm_host_stop_request *req;
-	const size_t len = sizeof(struct hbm_host_stop_request);
+	struct hbm_host_stop_request stop_req = { 0 } ;
 
-	ishtp_hbm_hdr(ishtp_hdr, len);
-	req = (struct hbm_host_stop_request *)data;
+	ishtp_hbm_hdr(&hdr, sizeof(stop_req));
 
-	memset(req, 0, sizeof(struct hbm_host_stop_request));
-	req->hbm_cmd = HOST_STOP_REQ_CMD;
-	req->reason = DRIVER_STOP_REQUEST;
+	stop_req.hbm_cmd = HOST_STOP_REQ_CMD;
+	stop_req.reason = DRIVER_STOP_REQUEST;
 
-	ishtp_write_message(dev, ishtp_hdr, data);
+	ishtp_write_message(dev, &hdr, &stop_req);
 }
 
 /**
@@ -294,15 +271,15 @@ int ishtp_hbm_cl_flow_control_req(struct ishtp_device *dev,
 				  struct ishtp_cl *cl)
 {
 	struct ishtp_msg_hdr hdr;
-	unsigned char data[128];
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
-	const size_t len = sizeof(struct hbm_flow_control);
+	struct hbm_flow_control flow_ctrl;
+	const size_t len = sizeof(flow_ctrl);
 	int	rv;
 	unsigned long	flags;
 
 	spin_lock_irqsave(&cl->fc_spinlock, flags);
-	ishtp_hbm_hdr(ishtp_hdr, len);
-	ishtp_hbm_cl_hdr(cl, ISHTP_FLOW_CONTROL_CMD, data, len);
+
+	ishtp_hbm_hdr(&hdr, len);
+	ishtp_hbm_cl_hdr(cl, ISHTP_FLOW_CONTROL_CMD, &flow_ctrl, len);
 
 	/*
 	 * Sync possible race when RB recycle and packet receive paths
@@ -315,7 +292,7 @@ int ishtp_hbm_cl_flow_control_req(struct ishtp_device *dev,
 
 	cl->recv_msg_num_frags = 0;
 
-	rv = ishtp_write_message(dev, ishtp_hdr, data);
+	rv = ishtp_write_message(dev, &hdr, &flow_ctrl);
 	if (!rv) {
 		++cl->out_flow_ctrl_creds;
 		++cl->out_flow_ctrl_cnt;
@@ -345,14 +322,13 @@ int ishtp_hbm_cl_flow_control_req(struct ishtp_device *dev,
 int ishtp_hbm_cl_disconnect_req(struct ishtp_device *dev, struct ishtp_cl *cl)
 {
 	struct ishtp_msg_hdr hdr;
-	unsigned char data[128];
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
-	const size_t len = sizeof(struct hbm_client_connect_request);
+	struct hbm_client_connect_request disconn_req;
+	const size_t len = sizeof(disconn_req);
 
-	ishtp_hbm_hdr(ishtp_hdr, len);
-	ishtp_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, data, len);
+	ishtp_hbm_hdr(&hdr, len);
+	ishtp_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, &disconn_req, len);
 
-	return ishtp_write_message(dev, ishtp_hdr, data);
+	return ishtp_write_message(dev, &hdr, &disconn_req);
 }
 
 /**
@@ -391,14 +367,13 @@ static void ishtp_hbm_cl_disconnect_res(struct ishtp_device *dev,
 int ishtp_hbm_cl_connect_req(struct ishtp_device *dev, struct ishtp_cl *cl)
 {
 	struct ishtp_msg_hdr hdr;
-	unsigned char data[128];
-	struct ishtp_msg_hdr *ishtp_hdr = &hdr;
-	const size_t len = sizeof(struct hbm_client_connect_request);
+	struct hbm_client_connect_request conn_req;
+	const size_t len = sizeof(conn_req);
 
-	ishtp_hbm_hdr(ishtp_hdr, len);
-	ishtp_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, data, len);
+	ishtp_hbm_hdr(&hdr, len);
+	ishtp_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, &conn_req, len);
 
-	return ishtp_write_message(dev, ishtp_hdr, data);
+	return ishtp_write_message(dev, &hdr, &conn_req);
 }
 
 /**

drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h

@@ -211,8 +211,6 @@ struct ishtp_device {
 	/* For both processing list  and free list */
 	spinlock_t wr_processing_spinlock;
 
-	spinlock_t out_ipc_spinlock;
-
 	struct ishtp_fw_client *fw_clients; /*Note:memory has to be allocated*/
 	DECLARE_BITMAP(fw_clients_map, ISHTP_CLIENTS_MAX);
 	DECLARE_BITMAP(host_clients_map, ISHTP_CLIENTS_MAX);