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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-04 06:03:24 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-04 06:03:24 +0300 |
| commit | 9929780e86854833e649b39b290b5fe921eb1701 (patch) | |
| tree | 7e3944e926a5ab81bb10397259df404280c75e45 /drivers/base/dma-coherent.c | |
| parent | 7a53eea1f7b527fd3b6d7ca992914840981afe99 (diff) | |
| parent | dd01c75f1df311793de6ef217c72036552000c9a (diff) | |
| download | linux-9929780e86854833e649b39b290b5fe921eb1701.tar.xz | |
Merge tag 'driver-core-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here are the "big" driver core patches for 4.9-rc1. Also in here are a
number of debugfs fixes that cropped up due to the changes that
happened in 4.8 for that filesystem. Overall, nothing major, just a
few fixes and cleanups.
All of these have been in linux-next with no reported issues"
* tag 'driver-core-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (23 commits)
drivers: dma-coherent: Move spinlock in dma_alloc_from_coherent()
drivers: dma-coherent: Fix DMA coherent size for less than page
MAINTAINERS: extend firmware_class maintainer list
debugfs: propagate release() call result
driver-core: platform: Catch errors from calls to irq_get_irq_data
sysfs print name of undiscoverable attribute group
carl9170: fix debugfs crashes
b43legacy: fix debugfs crash
b43: fix debugfs crash
debugfs: introduce a public file_operations accessor
device core: Remove deprecated create_singlethread_workqueue
drivers/base dmam_declare_coherent_memory leaks
platform: don't return 0 from platform_get_irq[_byname]() on error
cpu: clean up register_cpu func
dma-mapping: use vma_pages().
drivers: dma-coherent: use vma_pages().
attribute_container: Fix typo
base: soc: make it explicitly non-modular
drivers: base: dma-mapping: page align the size when unmap_kernel_range
platform driver: fix use-after-free in platform_device_del()
...
Diffstat (limited to 'drivers/base/dma-coherent.c')
| -rw-r--r-- | drivers/base/dma-coherent.c | 10 |
1 files changed, 6 insertions, 4 deletions
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) { |