If Mike was on fire and i had water, i'd drink the water.

drivers/acpi/power.c

@@ -1035,13 +1035,8 @@ void acpi_turn_off_unused_power_resources(void)
 	list_for_each_entry_reverse(resource, &acpi_power_resource_list, list_node) {
 		mutex_lock(&resource->resource_lock);
 
-		/*
-		 * Turn off power resources in an unknown state too, because the
-		 * platform firmware on some system expects the OS to turn off
-		 * power resources without any users unconditionally.
-		 */
 		if (!resource->ref_count &&
-		    resource->state != ACPI_POWER_RESOURCE_STATE_OFF) {
+		    resource->state == ACPI_POWER_RESOURCE_STATE_ON) {
 			acpi_handle_debug(resource->device.handle, "Turning OFF\n");
 			__acpi_power_off(resource);
 		}

drivers/acpi/tables.c

@@ -21,6 +21,7 @@
 #include <linux/earlycpio.h>
 #include <linux/initrd.h>
 #include <linux/security.h>
+#include <linux/kmemleak.h>
 #include "internal.h"
 
 #ifdef CONFIG_ACPI_CUSTOM_DSDT
@@ -601,6 +602,8 @@ void __init acpi_table_upgrade(void)
 	 */
 	arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
 
+	kmemleak_ignore_phys(acpi_tables_addr);
+
 	/*
 	 * early_ioremap only can remap 256k one time. If we map all
 	 * tables one time, we will hit the limit. Need to map chunks

drivers/clk/bcm/clk-bcm2835.c

@@ -938,8 +938,7 @@ static int bcm2835_clock_is_on(struct clk_hw *hw)
 
 static u32 bcm2835_clock_choose_div(struct clk_hw *hw,
 				    unsigned long rate,
-				    unsigned long parent_rate,
+				    unsigned long parent_rate)
-				    bool round_up)
 {
 	struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw);
 	const struct bcm2835_clock_data *data = clock->data;
@@ -951,10 +950,6 @@ static u32 bcm2835_clock_choose_div(struct clk_hw *hw,
 
 	rem = do_div(temp, rate);
 	div = temp;
-
-	/* Round up and mask off the unused bits */
-	if (round_up && ((div & unused_frac_mask) != 0 || rem != 0))
-		div += unused_frac_mask + 1;
 	div &= ~unused_frac_mask;
 
 	/* different clamping limits apply for a mash clock */
@@ -1111,7 +1106,7 @@ static int bcm2835_clock_set_rate_and_parent(struct clk_hw *hw,
 	struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw);
 	struct bcm2835_cprman *cprman = clock->cprman;
 	const struct bcm2835_clock_data *data = clock->data;
-	u32 div = bcm2835_clock_choose_div(hw, rate, parent_rate, false);
+	u32 div = bcm2835_clock_choose_div(hw, rate, parent_rate);
 	u32 ctl;
 
 	spin_lock(&cprman->regs_lock);
@@ -1177,7 +1172,7 @@ static unsigned long bcm2835_clock_choose_div_and_prate(struct clk_hw *hw,
 
 	if (!(BIT(parent_idx) & data->set_rate_parent)) {
 		*prate = clk_hw_get_rate(parent);
-		*div = bcm2835_clock_choose_div(hw, rate, *prate, true);
+		*div = bcm2835_clock_choose_div(hw, rate, *prate);
 
 		*avgrate = bcm2835_clock_rate_from_divisor(clock, *prate, *div);
 
@@ -1263,7 +1258,7 @@ static int bcm2835_clock_determine_rate(struct clk_hw *hw,
 		rate = bcm2835_clock_choose_div_and_prate(hw, i, req->rate,
 							  &div, &prate,
 							  &avgrate);
-		if (rate > best_rate && rate <= req->rate) {
+		if (abs(req->rate - rate) < abs(req->rate - best_rate)) {
 			best_parent = parent;
 			best_prate = prate;
 			best_rate = rate;

drivers/gpio/gpio-mlxbf2.c

@@ -256,6 +256,11 @@ mlxbf2_gpio_probe(struct platform_device *pdev)
 			NULL,
 			0);
 
+	if (ret) {
+		dev_err(dev, "bgpio_init failed\n");
+		return ret;
+	}
+
 	gc->direction_input = mlxbf2_gpio_direction_input;
 	gc->direction_output = mlxbf2_gpio_direction_output;
 	gc->ngpio = npins;

drivers/gpio/gpio-xgs-iproc.c

@@ -224,7 +224,7 @@ static int iproc_gpio_probe(struct platform_device *pdev)
 	}
 
 	chip->gc.label = dev_name(dev);
-	if (of_property_read_u32(dn, "ngpios", &num_gpios))
+	if (!of_property_read_u32(dn, "ngpios", &num_gpios))
 		chip->gc.ngpio = num_gpios;
 
 	irq = platform_get_irq(pdev, 0);

drivers/isdn/hardware/mISDN/hfcpci.c

@@ -1994,14 +1994,14 @@ setup_hw(struct hfc_pci *hc)
 	pci_set_master(hc->pdev);
 	if (!hc->irq) {
 		printk(KERN_WARNING "HFC-PCI: No IRQ for PCI card found\n");
-		return 1;
+		return -EINVAL;
 	}
 	hc->hw.pci_io =
 		(char __iomem *)(unsigned long)hc->pdev->resource[1].start;
 
 	if (!hc->hw.pci_io) {
 		printk(KERN_WARNING "HFC-PCI: No IO-Mem for PCI card found\n");
-		return 1;
+		return -ENOMEM;
 	}
 	/* Allocate memory for FIFOS */
 	/* the memory needs to be on a 32k boundary within the first 4G */
@@ -2012,7 +2012,7 @@ setup_hw(struct hfc_pci *hc)
 	if (!buffer) {
 		printk(KERN_WARNING
 		       "HFC-PCI: Error allocating memory for FIFO!\n");
-		return 1;
+		return -ENOMEM;
 	}
 	hc->hw.fifos = buffer;
 	pci_write_config_dword(hc->pdev, 0x80, hc->hw.dmahandle);
@@ -2022,7 +2022,7 @@ setup_hw(struct hfc_pci *hc)
 		       "HFC-PCI: Error in ioremap for PCI!\n");
 		dma_free_coherent(&hc->pdev->dev, 0x8000, hc->hw.fifos,
 				  hc->hw.dmahandle);
-		return 1;
+		return -ENOMEM;
 	}
 
 	printk(KERN_INFO

drivers/nfc/port100.c

@@ -1006,11 +1006,11 @@ static u64 port100_get_command_type_mask(struct port100 *dev)
 
 	skb = port100_alloc_skb(dev, 0);
 	if (!skb)
-		return -ENOMEM;
+		return 0;
 
 	resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
 	if (IS_ERR(resp))
-		return PTR_ERR(resp);
+		return 0;
 
 	if (resp->len < 8)
 		mask = 0;

drivers/nfc/st95hf/core.c

@@ -1226,11 +1226,9 @@ static int st95hf_remove(struct spi_device *nfc_spi_dev)
 				 &reset_cmd,
 				 ST95HF_RESET_CMD_LEN,
 				 ASYNC);
-	if (result) {
+	if (result)
 		dev_err(&spictx->spidev->dev,
 			"ST95HF reset failed in remove() err = %d\n", result);
-		return result;
-	}
 
 	/* wait for 3 ms to complete the controller reset process */
 	usleep_range(3000, 4000);
@@ -1239,7 +1237,7 @@ static int st95hf_remove(struct spi_device *nfc_spi_dev)
 	if (stcontext->st95hf_supply)
 		regulator_disable(stcontext->st95hf_supply);
 
-	return result;
+	return 0;
 }
 
 /* Register as SPI protocol driver */

drivers/vdpa/vdpa_user/vduse_dev.c

@@ -80,6 +80,7 @@ struct vduse_dev {
 	struct vdpa_callback config_cb;
 	struct work_struct inject;
 	spinlock_t irq_lock;
+	struct rw_semaphore rwsem;
 	int minor;
 	bool broken;
 	bool connected;
@@ -410,6 +411,8 @@ static void vduse_dev_reset(struct vduse_dev *dev)
 	if (domain->bounce_map)
 		vduse_domain_reset_bounce_map(domain);
 
+	down_write(&dev->rwsem);
+
 	dev->status = 0;
 	dev->driver_features = 0;
 	dev->generation++;
@@ -443,6 +446,8 @@ static void vduse_dev_reset(struct vduse_dev *dev)
 		flush_work(&vq->inject);
 		flush_work(&vq->kick);
 	}
+
+	up_write(&dev->rwsem);
 }
 
 static int vduse_vdpa_set_vq_address(struct vdpa_device *vdpa, u16 idx,
@@ -885,6 +890,23 @@ static void vduse_vq_irq_inject(struct work_struct *work)
 	spin_unlock_irq(&vq->irq_lock);
 }
 
+static int vduse_dev_queue_irq_work(struct vduse_dev *dev,
+				    struct work_struct *irq_work)
+{
+	int ret = -EINVAL;
+
+	down_read(&dev->rwsem);
+	if (!(dev->status & VIRTIO_CONFIG_S_DRIVER_OK))
+		goto unlock;
+
+	ret = 0;
+	queue_work(vduse_irq_wq, irq_work);
+unlock:
+	up_read(&dev->rwsem);
+
+	return ret;
+}
+
 static long vduse_dev_ioctl(struct file *file, unsigned int cmd,
 			    unsigned long arg)
 {
@@ -966,8 +988,7 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd,
 		break;
 	}
 	case VDUSE_DEV_INJECT_CONFIG_IRQ:
-		ret = 0;
+		ret = vduse_dev_queue_irq_work(dev, &dev->inject);
-		queue_work(vduse_irq_wq, &dev->inject);
 		break;
 	case VDUSE_VQ_SETUP: {
 		struct vduse_vq_config config;
@@ -1053,9 +1074,8 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd,
 		if (index >= dev->vq_num)
 			break;
 
-		ret = 0;
 		index = array_index_nospec(index, dev->vq_num);
-		queue_work(vduse_irq_wq, &dev->vqs[index].inject);
+		ret = vduse_dev_queue_irq_work(dev, &dev->vqs[index].inject);
 		break;
 	}
 	default:
@@ -1136,6 +1156,7 @@ static struct vduse_dev *vduse_dev_create(void)
 	INIT_LIST_HEAD(&dev->send_list);
 	INIT_LIST_HEAD(&dev->recv_list);
 	spin_lock_init(&dev->irq_lock);
+	init_rwsem(&dev->rwsem);
 
 	INIT_WORK(&dev->inject, vduse_dev_irq_inject);
 	init_waitqueue_head(&dev->waitq);