Adding upstream version 6.8.9.upstream/6.8.9

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 96 insertions, 109 deletions

diff --git a/drivers/platform/chrome/cros_ec_debugfs.c b/drivers/platform/chrome/cros_ec_debugfs.c
index 091fdc154d..6bf6f0e7b5 100644
--- a/drivers/platform/chrome/cros_ec_debugfs.c
+++ b/drivers/platform/chrome/cros_ec_debugfs.c
@@ -454,7 +454,7 @@ static int cros_ec_create_panicinfo(struct cros_ec_debugfs *debug_info)
 	debug_info->panicinfo_blob.data = data;
 	debug_info->panicinfo_blob.size = ret;
 
-	debugfs_create_blob("panicinfo", S_IFREG | 0444, debug_info->dir,
+	debugfs_create_blob("panicinfo", 0444, debug_info->dir,
 			    &debug_info->panicinfo_blob);
 
 	return 0;
diff --git a/drivers/platform/chrome/cros_ec_ishtp.c b/drivers/platform/chrome/cros_ec_ishtp.c
index cb2031cf71..5ac37bd024 100644
--- a/drivers/platform/chrome/cros_ec_ishtp.c
+++ b/drivers/platform/chrome/cros_ec_ishtp.c
@@ -367,55 +367,33 @@ static void ish_event_cb(struct ishtp_cl_device *cl_device)
 /**
  * cros_ish_init() - Init function for ISHTP client
  * @cros_ish_cl: ISHTP client instance
+ * @reset: true if called from reset handler
  *
  * This function complete the initializtion of the client.
  *
  * Return: 0 for success, negative error code for failure.
  */
-static int cros_ish_init(struct ishtp_cl *cros_ish_cl)
+static int cros_ish_init(struct ishtp_cl *cros_ish_cl, bool reset)
 {
 	int rv;
-	struct ishtp_device *dev;
-	struct ishtp_fw_client *fw_client;
 	struct ishtp_cl_data *client_data = ishtp_get_client_data(cros_ish_cl);
 
-	rv = ishtp_cl_link(cros_ish_cl);
-	if (rv) {
-		dev_err(cl_data_to_dev(client_data),
-			"ishtp_cl_link failed\n");
-		return rv;
-	}
-
-	dev = ishtp_get_ishtp_device(cros_ish_cl);
-
-	/* Connect to firmware client */
-	ishtp_set_tx_ring_size(cros_ish_cl, CROS_ISH_CL_TX_RING_SIZE);
-	ishtp_set_rx_ring_size(cros_ish_cl, CROS_ISH_CL_RX_RING_SIZE);
-
-	fw_client = ishtp_fw_cl_get_client(dev, &cros_ec_ishtp_id_table[0].guid);
-	if (!fw_client) {
-		dev_err(cl_data_to_dev(client_data),
-			"ish client uuid not found\n");
-		rv = -ENOENT;
-		goto err_cl_unlink;
-	}
-
-	ishtp_cl_set_fw_client_id(cros_ish_cl,
-				  ishtp_get_fw_client_id(fw_client));
-	ishtp_set_connection_state(cros_ish_cl, ISHTP_CL_CONNECTING);
-
-	rv = ishtp_cl_connect(cros_ish_cl);
+	rv = ishtp_cl_establish_connection(cros_ish_cl,
+					   &cros_ec_ishtp_id_table[0].guid,
+					   CROS_ISH_CL_TX_RING_SIZE,
+					   CROS_ISH_CL_RX_RING_SIZE,
+					   reset);
 	if (rv) {
 		dev_err(cl_data_to_dev(client_data),
 			"client connect fail\n");
-		goto err_cl_unlink;
+		goto err_cl_disconnect;
 	}
 
 	ishtp_register_event_cb(client_data->cl_device, ish_event_cb);
 	return 0;
 
-err_cl_unlink:
-	ishtp_cl_unlink(cros_ish_cl);
+err_cl_disconnect:
+	ishtp_cl_destroy_connection(cros_ish_cl, reset);
 	return rv;
 }
 
@@ -427,10 +405,7 @@ err_cl_unlink:
  */
 static void cros_ish_deinit(struct ishtp_cl *cros_ish_cl)
 {
-	ishtp_set_connection_state(cros_ish_cl, ISHTP_CL_DISCONNECTING);
-	ishtp_cl_disconnect(cros_ish_cl);
-	ishtp_cl_unlink(cros_ish_cl);
-	ishtp_cl_flush_queues(cros_ish_cl);
+	ishtp_cl_destroy_connection(cros_ish_cl, false);
 
 	/* Disband and free all Tx and Rx client-level rings */
 	ishtp_cl_free(cros_ish_cl);
@@ -592,7 +567,6 @@ static void reset_handler(struct work_struct *work)
 	int rv;
 	struct device *dev;
 	struct ishtp_cl *cros_ish_cl;
-	struct ishtp_cl_device *cl_device;
 	struct ishtp_cl_data *client_data =
 		container_of(work, struct ishtp_cl_data, work_ishtp_reset);
 
@@ -600,26 +574,11 @@ static void reset_handler(struct work_struct *work)
 	down_write(&init_lock);
 
 	cros_ish_cl = client_data->cros_ish_cl;
-	cl_device = client_data->cl_device;
 
-	/* Unlink, flush queues & start again */
-	ishtp_cl_unlink(cros_ish_cl);
-	ishtp_cl_flush_queues(cros_ish_cl);
-	ishtp_cl_free(cros_ish_cl);
-
-	cros_ish_cl = ishtp_cl_allocate(cl_device);
-	if (!cros_ish_cl) {
-		up_write(&init_lock);
-		return;
-	}
-
-	ishtp_set_drvdata(cl_device, cros_ish_cl);
-	ishtp_set_client_data(cros_ish_cl, client_data);
-	client_data->cros_ish_cl = cros_ish_cl;
+	ishtp_cl_destroy_connection(cros_ish_cl, true);
 
-	rv = cros_ish_init(cros_ish_cl);
+	rv = cros_ish_init(cros_ish_cl, true);
 	if (rv) {
-		ishtp_cl_free(cros_ish_cl);
 		dev_err(cl_data_to_dev(client_data), "Reset Failed\n");
 		up_write(&init_lock);
 		return;
@@ -672,7 +631,7 @@ static int cros_ec_ishtp_probe(struct ishtp_cl_device *cl_device)
 	INIT_WORK(&client_data->work_ec_evt,
 		  ish_evt_handler);
 
-	rv = cros_ish_init(cros_ish_cl);
+	rv = cros_ish_init(cros_ish_cl, false);
 	if (rv)
 		goto end_ishtp_cl_init_error;
 
@@ -690,10 +649,7 @@ static int cros_ec_ishtp_probe(struct ishtp_cl_device *cl_device)
 	return 0;
 
 end_cros_ec_dev_init_error:
-	ishtp_set_connection_state(cros_ish_cl, ISHTP_CL_DISCONNECTING);
-	ishtp_cl_disconnect(cros_ish_cl);
-	ishtp_cl_unlink(cros_ish_cl);
-	ishtp_cl_flush_queues(cros_ish_cl);
+	ishtp_cl_destroy_connection(cros_ish_cl, false);
 	ishtp_put_device(cl_device);
 end_ishtp_cl_init_error:
 	ishtp_cl_free(cros_ish_cl);
diff --git a/drivers/platform/chrome/cros_ec_sensorhub_ring.c b/drivers/platform/chrome/cros_ec_sensorhub_ring.c
index 71948dade0..1205219515 100644
--- a/drivers/platform/chrome/cros_ec_sensorhub_ring.c
+++ b/drivers/platform/chrome/cros_ec_sensorhub_ring.c
@@ -103,7 +103,7 @@ EXPORT_SYMBOL_GPL(cros_ec_sensorhub_unregister_push_data);
  * @sensorhub: Sensor Hub object
  * @on: true when events are requested.
  *
- * To be called before sleeping or when noone is listening.
+ * To be called before sleeping or when no one is listening.
  * Return: 0 on success, or an error when we can not communicate with the EC.
  *
  */
@@ -133,33 +133,61 @@ int cros_ec_sensorhub_ring_fifo_enable(struct cros_ec_sensorhub *sensorhub,
 	return ret;
 }
 
-static int cros_ec_sensor_ring_median_cmp(const void *pv1, const void *pv2)
+static void cros_ec_sensor_ring_median_swap(s64 *a, s64 *b)
 {
-	s64 v1 = *(s64 *)pv1;
-	s64 v2 = *(s64 *)pv2;
-
-	if (v1 > v2)
-		return 1;
-	else if (v1 < v2)
-		return -1;
-	else
-		return 0;
+	s64 tmp = *a;
+	*a = *b;
+	*b = tmp;
 }
 
 /*
  * cros_ec_sensor_ring_median: Gets median of an array of numbers
  *
- * For now it's implemented using an inefficient > O(n) sort then return
- * the middle element. A more optimal method would be something like
- * quickselect, but given that n = 64 we can probably live with it in the
- * name of clarity.
+ * It's implemented using the quickselect algorithm, which achieves an
+ * average time complexity of O(n) the middle element. In the worst case,
+ * the runtime of quickselect could regress to O(n^2). To mitigate this,
+ * algorithms like median-of-medians exist, which can guarantee O(n) even
+ * in the worst case. However, these algorithms come with a higher
+ * overhead and are more complex to implement, making quickselect a
+ * pragmatic choice for our use case.
  *
- * Warning: the input array gets modified (sorted)!
+ * Warning: the input array gets modified!
  */
 static s64 cros_ec_sensor_ring_median(s64 *array, size_t length)
 {
-	sort(array, length, sizeof(s64), cros_ec_sensor_ring_median_cmp, NULL);
-	return array[length / 2];
+	int lo = 0;
+	int hi = length - 1;
+
+	while (lo <= hi) {
+		int mid = lo + (hi - lo) / 2;
+		int pivot, i;
+
+		if (array[lo] > array[mid])
+			cros_ec_sensor_ring_median_swap(&array[lo], &array[mid]);
+		if (array[lo] > array[hi])
+			cros_ec_sensor_ring_median_swap(&array[lo], &array[hi]);
+		if (array[mid] < array[hi])
+			cros_ec_sensor_ring_median_swap(&array[mid], &array[hi]);
+
+		pivot = array[hi];
+		i = lo - 1;
+
+		for (int j = lo; j < hi; j++)
+			if (array[j] < pivot)
+				cros_ec_sensor_ring_median_swap(&array[++i], &array[j]);
+
+		/* The pivot's index corresponds to i+1. */
+		cros_ec_sensor_ring_median_swap(&array[i + 1], &array[hi]);
+		if (i + 1 == length / 2)
+			return array[i + 1];
+		if (i + 1 > length / 2)
+			hi = i;
+		else
+			lo = i + 2;
+	}
+
+	/* Should never reach here. */
+	return -1;
 }
 
 /*
@@ -175,8 +203,8 @@ static s64 cros_ec_sensor_ring_median(s64 *array, size_t length)
  *
  * While a and b are recorded at accurate times (due to the EC real time
  * nature); c is pretty untrustworthy, even though it's recorded the
- * first thing in ec_irq_handler(). There is a very good change we'll get
- * added lantency due to:
+ * first thing in ec_irq_handler(). There is a very good chance we'll get
+ * added latency due to:
  *   other irqs
  *   ddrfreq
  *   cpuidle
@@ -511,7 +539,7 @@ cros_ec_sensor_ring_process_event(struct cros_ec_sensorhub *sensorhub,
  *                                 ringbuffer.
  *
  * This is the new spreading code, assumes every sample's timestamp
- * preceeds the sample. Run if tight_timestamps == true.
+ * precedes the sample. Run if tight_timestamps == true.
  *
  * Sometimes the EC receives only one interrupt (hence timestamp) for
  * a batch of samples. Only the first sample will have the correct
@@ -595,7 +623,7 @@ cros_ec_sensor_ring_spread_add(struct cros_ec_sensorhub *sensorhub,
 			} else {
 				/*
 				 * Push first sample in the batch to the,
-				 * kifo, it's guaranteed to be correct, the
+				 * kfifo, it's guaranteed to be correct, the
 				 * rest will follow later on.
 				 */
 				sample_idx = 1;
@@ -701,7 +729,7 @@ done_with_this_batch:
  *           last_out -->
  *
  *
- * We spread time for the samples using perod p = (current - TS1)/4.
+ * We spread time for the samples using period p = (current - TS1)/4.
  * between TS1 and TS2: [TS1+p/4, TS1+2p/4, TS1+3p/4, current_timestamp].
  *
  */
diff --git a/drivers/platform/chrome/cros_ec_uart.c b/drivers/platform/chrome/cros_ec_uart.c
index 788246559b..eb5eddeb73 100644
--- a/drivers/platform/chrome/cros_ec_uart.c
+++ b/drivers/platform/chrome/cros_ec_uart.c
@@ -81,9 +81,8 @@ struct cros_ec_uart {
 	struct response_info response;
 };
 
-static int cros_ec_uart_rx_bytes(struct serdev_device *serdev,
-				 const u8 *data,
-				 size_t count)
+static ssize_t cros_ec_uart_rx_bytes(struct serdev_device *serdev,
+				     const u8 *data, size_t count)
 {
 	struct ec_host_response *host_response;
 	struct cros_ec_device *ec_dev = serdev_device_get_drvdata(serdev);
@@ -264,12 +263,6 @@ static int cros_ec_uart_probe(struct serdev_device *serdev)
 	if (!ec_dev)
 		return -ENOMEM;
 
-	ret = devm_serdev_device_open(dev, serdev);
-	if (ret) {
-		dev_err(dev, "Unable to open UART device");
-		return ret;
-	}
-
 	serdev_device_set_drvdata(serdev, ec_dev);
 	init_waitqueue_head(&ec_uart->response.wait_queue);
 
@@ -281,14 +274,6 @@ static int cros_ec_uart_probe(struct serdev_device *serdev)
 		return ret;
 	}
 
-	ret = serdev_device_set_baudrate(serdev, ec_uart->baudrate);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set up host baud rate (%d)", ret);
-		return ret;
-	}
-
-	serdev_device_set_flow_control(serdev, ec_uart->flowcontrol);
-
 	/* Initialize ec_dev for cros_ec  */
 	ec_dev->phys_name = dev_name(dev);
 	ec_dev->dev = dev;
@@ -302,6 +287,20 @@ static int cros_ec_uart_probe(struct serdev_device *serdev)
 
 	serdev_device_set_client_ops(serdev, &cros_ec_uart_client_ops);
 
+	ret = devm_serdev_device_open(dev, serdev);
+	if (ret) {
+		dev_err(dev, "Unable to open UART device");
+		return ret;
+	}
+
+	ret = serdev_device_set_baudrate(serdev, ec_uart->baudrate);
+	if (ret < 0) {
+		dev_err(dev, "Failed to set up host baud rate (%d)", ret);
+		return ret;
+	}
+
+	serdev_device_set_flow_control(serdev, ec_uart->flowcontrol);
+
 	return cros_ec_register(ec_dev);
 }
 
diff --git a/drivers/platform/chrome/cros_ec_vbc.c b/drivers/platform/chrome/cros_ec_vbc.c
index 2e4af10c76..274ea0c64b 100644
--- a/drivers/platform/chrome/cros_ec_vbc.c
+++ b/drivers/platform/chrome/cros_ec_vbc.c
@@ -20,10 +20,14 @@ static ssize_t vboot_context_read(struct file *filp, struct kobject *kobj,
 	struct device *dev = kobj_to_dev(kobj);
 	struct cros_ec_dev *ec = to_cros_ec_dev(dev);
 	struct cros_ec_device *ecdev = ec->ec_dev;
-	struct ec_params_vbnvcontext *params;
 	struct cros_ec_command *msg;
+	/*
+	 * This should be a pointer to the same type as op field in
+	 * struct ec_params_vbnvcontext.
+	 */
+	uint32_t *params_op;
 	int err;
-	const size_t para_sz = sizeof(params->op);
+	const size_t para_sz = sizeof(*params_op);
 	const size_t resp_sz = sizeof(struct ec_response_vbnvcontext);
 	const size_t payload = max(para_sz, resp_sz);
 
@@ -32,8 +36,8 @@ static ssize_t vboot_context_read(struct file *filp, struct kobject *kobj,
 		return -ENOMEM;
 
 	/* NB: we only kmalloc()ated enough space for the op field */
-	params = (struct ec_params_vbnvcontext *)msg->data;
-	params->op = EC_VBNV_CONTEXT_OP_READ;
+	params_op = (uint32_t *)msg->data;
+	*params_op = EC_VBNV_CONTEXT_OP_READ;
 
 	msg->version = EC_VER_VBNV_CONTEXT;
 	msg->command = EC_CMD_VBNV_CONTEXT;
diff --git a/drivers/platform/chrome/wilco_ec/event.c b/drivers/platform/chrome/wilco_ec/event.c
index f80a7c83cf..13291fb421 100644
--- a/drivers/platform/chrome/wilco_ec/event.c
+++ b/drivers/platform/chrome/wilco_ec/event.c
@@ -495,7 +495,7 @@ static int event_device_add(struct acpi_device *adev)
 free_dev_data:
 	hangup_device(dev_data);
 free_minor:
-	ida_simple_remove(&event_ida, minor);
+	ida_free(&event_ida, minor);
 	return error;
 }
 
@@ -504,7 +504,7 @@ static void event_device_remove(struct acpi_device *adev)
 	struct event_device_data *dev_data = adev->driver_data;
 
 	cdev_device_del(&dev_data->cdev, &dev_data->dev);
-	ida_simple_remove(&event_ida, MINOR(dev_data->dev.devt));
+	ida_free(&event_ida, MINOR(dev_data->dev.devt));
 	hangup_device(dev_data);
 }
 
diff --git a/drivers/platform/chrome/wilco_ec/telemetry.c b/drivers/platform/chrome/wilco_ec/telemetry.c
index 253098bace..b7c616f3d1 100644
--- a/drivers/platform/chrome/wilco_ec/telemetry.c
+++ b/drivers/platform/chrome/wilco_ec/telemetry.c
@@ -372,7 +372,7 @@ static int telem_device_probe(struct platform_device *pdev)
 
 	dev_data = kzalloc(sizeof(*dev_data), GFP_KERNEL);
 	if (!dev_data) {
-		ida_simple_remove(&telem_ida, minor);
+		ida_free(&telem_ida, minor);
 		return -ENOMEM;
 	}
 
@@ -393,7 +393,7 @@ static int telem_device_probe(struct platform_device *pdev)
 	error = cdev_device_add(&dev_data->cdev, &dev_data->dev);
 	if (error) {
 		put_device(&dev_data->dev);
-		ida_simple_remove(&telem_ida, minor);
+		ida_free(&telem_ida, minor);
 		return error;
 	}
 
@@ -405,7 +405,7 @@ static void telem_device_remove(struct platform_device *pdev)
 	struct telem_device_data *dev_data = platform_get_drvdata(pdev);
 
 	cdev_device_del(&dev_data->cdev, &dev_data->dev);
-	ida_simple_remove(&telem_ida, MINOR(dev_data->dev.devt));
+	ida_free(&telem_ida, MINOR(dev_data->dev.devt));
 	put_device(&dev_data->dev);
 }