diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/base/attribute_container.c | 2 | ||||
| -rw-r--r-- | drivers/base/core.c | 39 | ||||
| -rw-r--r-- | drivers/base/cpu.c | 11 | ||||
| -rw-r--r-- | drivers/base/dd.c | 33 | ||||
| -rw-r--r-- | drivers/base/dma-coherent.c | 10 | ||||
| -rw-r--r-- | drivers/base/dma-mapping.c | 11 | ||||
| -rw-r--r-- | drivers/base/platform.c | 18 | ||||
| -rw-r--r-- | drivers/base/soc.c | 9 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/debug.c | 6 | ||||
| -rw-r--r-- | drivers/net/wireless/broadcom/b43/debugfs.c | 6 | ||||
| -rw-r--r-- | drivers/net/wireless/broadcom/b43legacy/debugfs.c | 6 |
12 files changed, 106 insertions, 55 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index 98504ec99c7d..fdf44cac08e6 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -212,6 +212,16 @@ config DEBUG_DEVRES If you are unsure about this, Say N here. +config DEBUG_TEST_DRIVER_REMOVE + bool "Test driver remove calls during probe" + depends on DEBUG_KERNEL + help + Say Y here if you want the Driver core to test driver remove functions + by calling probe, remove, probe. This tests the remove path without + having to unbind the driver or unload the driver module. + + If you are unsure about this, say N here. + config SYS_HYPERVISOR bool default n diff --git a/drivers/base/attribute_container.c b/drivers/base/attribute_container.c index 2ba4cac080c5..95e3ef82f3b7 100644 --- a/drivers/base/attribute_container.c +++ b/drivers/base/attribute_container.c @@ -243,7 +243,7 @@ attribute_container_remove_device(struct device *dev, * @dev: The generic device to run the trigger for * @fn the function to execute for each classdev. * - * This funcion is for executing a trigger when you need to know both + * This function is for executing a trigger when you need to know both * the container and the classdev. If you only care about the * container, then use attribute_container_trigger() instead. */ diff --git a/drivers/base/core.c b/drivers/base/core.c index 70c5be5b03a7..ce057a568673 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -836,11 +836,29 @@ static struct kobject *get_device_parent(struct device *dev, return NULL; } +static inline bool live_in_glue_dir(struct kobject *kobj, + struct device *dev) +{ + if (!kobj || !dev->class || + kobj->kset != &dev->class->p->glue_dirs) + return false; + return true; +} + +static inline struct kobject *get_glue_dir(struct device *dev) +{ + return dev->kobj.parent; +} + +/* + * make sure cleaning up dir as the last step, we need to make + * sure .release handler of kobject is run with holding the + * global lock + */ static void cleanup_glue_dir(struct device *dev, struct kobject *glue_dir) { /* see if we live in a "glue" directory */ - if (!glue_dir || !dev->class || - glue_dir->kset != &dev->class->p->glue_dirs) + if (!live_in_glue_dir(glue_dir, dev)) return; mutex_lock(&gdp_mutex); @@ -848,11 +866,6 @@ static void cleanup_glue_dir(struct device *dev, struct kobject *glue_dir) mutex_unlock(&gdp_mutex); } -static void cleanup_device_parent(struct device *dev) -{ - cleanup_glue_dir(dev, dev->kobj.parent); -} - static int device_add_class_symlinks(struct device *dev) { struct device_node *of_node = dev_of_node(dev); @@ -1028,6 +1041,7 @@ int device_add(struct device *dev) struct kobject *kobj; struct class_interface *class_intf; int error = -EINVAL; + struct kobject *glue_dir = NULL; dev = get_device(dev); if (!dev) @@ -1072,8 +1086,10 @@ int device_add(struct device *dev) /* first, register with generic layer. */ /* we require the name to be set before, and pass NULL */ error = kobject_add(&dev->kobj, dev->kobj.parent, NULL); - if (error) + if (error) { + glue_dir = get_glue_dir(dev); goto Error; + } /* notify platform of device entry */ if (platform_notify) @@ -1154,9 +1170,10 @@ done: device_remove_file(dev, &dev_attr_uevent); attrError: kobject_uevent(&dev->kobj, KOBJ_REMOVE); + glue_dir = get_glue_dir(dev); kobject_del(&dev->kobj); Error: - cleanup_device_parent(dev); + cleanup_glue_dir(dev, glue_dir); put_device(parent); name_error: kfree(dev->p); @@ -1232,6 +1249,7 @@ EXPORT_SYMBOL_GPL(put_device); void device_del(struct device *dev) { struct device *parent = dev->parent; + struct kobject *glue_dir = NULL; struct class_interface *class_intf; /* Notify clients of device removal. This call must come @@ -1277,8 +1295,9 @@ void device_del(struct device *dev) blocking_notifier_call_chain(&dev->bus->p->bus_notifier, BUS_NOTIFY_REMOVED_DEVICE, dev); kobject_uevent(&dev->kobj, KOBJ_REMOVE); - cleanup_device_parent(dev); + glue_dir = get_glue_dir(dev); kobject_del(&dev->kobj); + cleanup_glue_dir(dev, glue_dir); put_device(parent); } EXPORT_SYMBOL_GPL(device_del); diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 691eeea2f19a..4c28e1a09786 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -371,12 +371,13 @@ int register_cpu(struct cpu *cpu, int num) if (cpu->hotpluggable) cpu->dev.groups = hotplugable_cpu_attr_groups; error = device_register(&cpu->dev); - if (!error) - per_cpu(cpu_sys_devices, num) = &cpu->dev; - if (!error) - register_cpu_under_node(num, cpu_to_node(num)); + if (error) + return error; - return error; + per_cpu(cpu_sys_devices, num) = &cpu->dev; + register_cpu_under_node(num, cpu_to_node(num)); + + return 0; } struct device *get_cpu_device(unsigned cpu) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 16688f50729c..d22a7260f42b 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -51,7 +51,6 @@ static DEFINE_MUTEX(deferred_probe_mutex); static LIST_HEAD(deferred_probe_pending_list); static LIST_HEAD(deferred_probe_active_list); -static struct workqueue_struct *deferred_wq; static atomic_t deferred_trigger_count = ATOMIC_INIT(0); /* @@ -175,7 +174,7 @@ static void driver_deferred_probe_trigger(void) * Kick the re-probe thread. It may already be scheduled, but it is * safe to kick it again. */ - queue_work(deferred_wq, &deferred_probe_work); + schedule_work(&deferred_probe_work); } /** @@ -211,14 +210,10 @@ void device_unblock_probing(void) */ static int deferred_probe_initcall(void) { - deferred_wq = create_singlethread_workqueue("deferwq"); - if (WARN_ON(!deferred_wq)) - return -ENOMEM; - driver_deferred_probe_enable = true; driver_deferred_probe_trigger(); /* Sort as many dependencies as possible before exiting initcalls */ - flush_workqueue(deferred_wq); + flush_work(&deferred_probe_work); return 0; } late_initcall(deferred_probe_initcall); @@ -329,6 +324,7 @@ static int really_probe(struct device *dev, struct device_driver *drv) { int ret = -EPROBE_DEFER; int local_trigger_count = atomic_read(&deferred_trigger_count); + bool test_remove = IS_ENABLED(CONFIG_DEBUG_TEST_DRIVER_REMOVE); if (defer_all_probes) { /* @@ -346,6 +342,7 @@ static int really_probe(struct device *dev, struct device_driver *drv) drv->bus->name, __func__, drv->name, dev_name(dev)); WARN_ON(!list_empty(&dev->devres_head)); +re_probe: dev->driver = drv; /* If using pinctrl, bind pins now before probing */ @@ -383,6 +380,25 @@ static int really_probe(struct device *dev, struct device_driver *drv) goto probe_failed; } + if (test_remove) { + test_remove = false; + + if (dev->bus && dev->bus->remove) + dev->bus->remove(dev); + else if (drv->remove) + drv->remove(dev); + + devres_release_all(dev); + driver_sysfs_remove(dev); + dev->driver = NULL; + dev_set_drvdata(dev, NULL); + if (dev->pm_domain && dev->pm_domain->dismiss) + dev->pm_domain->dismiss(dev); + pm_runtime_reinit(dev); + + goto re_probe; + } + pinctrl_init_done(dev); if (dev->pm_domain && dev->pm_domain->sync) @@ -460,8 +476,7 @@ int driver_probe_done(void) void wait_for_device_probe(void) { /* wait for the deferred probe workqueue to finish */ - if (driver_deferred_probe_enable) - flush_workqueue(deferred_wq); + flush_work(&deferred_probe_work); /* wait for the known devices to complete their probing */ wait_event(probe_waitqueue, atomic_read(&probe_count) == 0); diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c index bdf28f7dd5e8..640a7e63c453 100644 --- a/drivers/base/dma-coherent.c +++ b/drivers/base/dma-coherent.c @@ -165,6 +165,7 @@ int dma_alloc_from_coherent(struct device *dev, ssize_t size, int order = get_order(size); unsigned long flags; int pageno; + int dma_memory_map; if (!dev) return 0; @@ -187,11 +188,12 @@ int dma_alloc_from_coherent(struct device *dev, ssize_t size, */ *dma_handle = mem->device_base + (pageno << PAGE_SHIFT); *ret = mem->virt_base + (pageno << PAGE_SHIFT); - if (mem->flags & DMA_MEMORY_MAP) + dma_memory_map = (mem->flags & DMA_MEMORY_MAP); + spin_unlock_irqrestore(&mem->spinlock, flags); + if (dma_memory_map) memset(*ret, 0, size); else memset_io(*ret, 0, size); - spin_unlock_irqrestore(&mem->spinlock, flags); return 1; @@ -261,8 +263,8 @@ int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma, (mem->virt_base + (mem->size << PAGE_SHIFT))) { unsigned long off = vma->vm_pgoff; int start = (vaddr - mem->virt_base) >> PAGE_SHIFT; - int user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; - int count = size >> PAGE_SHIFT; + int user_count = vma_pages(vma); + int count = PAGE_ALIGN(size) >> PAGE_SHIFT; *ret = -ENXIO; if (off < count && user_count <= count - off) { diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c index d799662f19eb..8f8b68c80986 100644 --- a/drivers/base/dma-mapping.c +++ b/drivers/base/dma-mapping.c @@ -198,10 +198,13 @@ int dmam_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, rc = dma_declare_coherent_memory(dev, phys_addr, device_addr, size, flags); - if (rc == 0) + if (rc) { devres_add(dev, res); - else + rc = 0; + } else { devres_free(res); + rc = -ENOMEM; + } return rc; } @@ -247,7 +250,7 @@ int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, { int ret = -ENXIO; #if defined(CONFIG_MMU) && !defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) - unsigned long user_count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; + unsigned long user_count = vma_pages(vma); unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT; unsigned long pfn = page_to_pfn(virt_to_page(cpu_addr)); unsigned long off = vma->vm_pgoff; @@ -334,7 +337,7 @@ void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags) return; } - unmap_kernel_range((unsigned long)cpu_addr, size); + unmap_kernel_range((unsigned long)cpu_addr, PAGE_ALIGN(size)); vunmap(cpu_addr); } #endif diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 6482d47deb50..c4af00385502 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -97,7 +97,7 @@ int platform_get_irq(struct platform_device *dev, unsigned int num) int ret; ret = of_irq_get(dev->dev.of_node, num); - if (ret >= 0 || ret == -EPROBE_DEFER) + if (ret > 0 || ret == -EPROBE_DEFER) return ret; } @@ -108,9 +108,14 @@ int platform_get_irq(struct platform_device *dev, unsigned int num) * IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER* * settings. */ - if (r && r->flags & IORESOURCE_BITS) - irqd_set_trigger_type(irq_get_irq_data(r->start), - r->flags & IORESOURCE_BITS); + if (r && r->flags & IORESOURCE_BITS) { + struct irq_data *irqd; + + irqd = irq_get_irq_data(r->start); + if (!irqd) + return -ENXIO; + irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS); + } return r ? r->start : -ENXIO; #endif @@ -175,7 +180,7 @@ int platform_get_irq_byname(struct platform_device *dev, const char *name) int ret; ret = of_irq_get_byname(dev->dev.of_node, name); - if (ret >= 0 || ret == -EPROBE_DEFER) + if (ret > 0 || ret == -EPROBE_DEFER) return ret; } @@ -434,6 +439,7 @@ void platform_device_del(struct platform_device *pdev) int i; if (pdev) { + device_remove_properties(&pdev->dev); device_del(&pdev->dev); if (pdev->id_auto) { @@ -446,8 +452,6 @@ void platform_device_del(struct platform_device *pdev) if (r->parent) release_resource(r); } - - device_remove_properties(&pdev->dev); } } EXPORT_SYMBOL_GPL(platform_device_del); diff --git a/drivers/base/soc.c b/drivers/base/soc.c index 75b98aad6faf..b63f23e6ad61 100644 --- a/drivers/base/soc.c +++ b/drivers/base/soc.c @@ -6,7 +6,6 @@ */ #include <linux/sysfs.h> -#include <linux/module.h> #include <linux/init.h> #include <linux/stat.h> #include <linux/slab.h> @@ -160,11 +159,3 @@ static int __init soc_bus_register(void) return bus_register(&soc_bus_type); } core_initcall(soc_bus_register); - -static void __exit soc_bus_unregister(void) -{ - ida_destroy(&soc_ida); - - bus_unregister(&soc_bus_type); -} -module_exit(soc_bus_unregister); diff --git a/drivers/net/wireless/ath/carl9170/debug.c b/drivers/net/wireless/ath/carl9170/debug.c index 6808db433283..ec3a64e5d2bb 100644 --- a/drivers/net/wireless/ath/carl9170/debug.c +++ b/drivers/net/wireless/ath/carl9170/debug.c @@ -75,7 +75,8 @@ static ssize_t carl9170_debugfs_read(struct file *file, char __user *userbuf, if (!ar) return -ENODEV; - dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops); + dfops = container_of(debugfs_real_fops(file), + struct carl9170_debugfs_fops, fops); if (!dfops->read) return -ENOSYS; @@ -127,7 +128,8 @@ static ssize_t carl9170_debugfs_write(struct file *file, if (!ar) return -ENODEV; - dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops); + dfops = container_of(debugfs_real_fops(file), + struct carl9170_debugfs_fops, fops); if (!dfops->write) return -ENOSYS; diff --git a/drivers/net/wireless/broadcom/b43/debugfs.c b/drivers/net/wireless/broadcom/b43/debugfs.c index b4bcd94aff6c..77046384dd80 100644 --- a/drivers/net/wireless/broadcom/b43/debugfs.c +++ b/drivers/net/wireless/broadcom/b43/debugfs.c @@ -524,7 +524,8 @@ static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf, goto out_unlock; } - dfops = container_of(file->f_op, struct b43_debugfs_fops, fops); + dfops = container_of(debugfs_real_fops(file), + struct b43_debugfs_fops, fops); if (!dfops->read) { err = -ENOSYS; goto out_unlock; @@ -585,7 +586,8 @@ static ssize_t b43_debugfs_write(struct file *file, goto out_unlock; } - dfops = container_of(file->f_op, struct b43_debugfs_fops, fops); + dfops = container_of(debugfs_real_fops(file), + struct b43_debugfs_fops, fops); if (!dfops->write) { err = -ENOSYS; goto out_unlock; diff --git a/drivers/net/wireless/broadcom/b43legacy/debugfs.c b/drivers/net/wireless/broadcom/b43legacy/debugfs.c index 090910ea259e..82ef56ed7ca1 100644 --- a/drivers/net/wireless/broadcom/b43legacy/debugfs.c +++ b/drivers/net/wireless/broadcom/b43legacy/debugfs.c @@ -221,7 +221,8 @@ static ssize_t b43legacy_debugfs_read(struct file *file, char __user *userbuf, goto out_unlock; } - dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops); + dfops = container_of(debugfs_real_fops(file), + struct b43legacy_debugfs_fops, fops); if (!dfops->read) { err = -ENOSYS; goto out_unlock; @@ -287,7 +288,8 @@ static ssize_t b43legacy_debugfs_write(struct file *file, goto out_unlock; } - dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops); + dfops = container_of(debugfs_real_fops(file), + struct b43legacy_debugfs_fops, fops); if (!dfops->write) { err = -ENOSYS; goto out_unlock; |