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Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

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Pull libnvdimm fixes from Dan Williams:

 - Two bug fixes for misuse of PAGE_MASK in scatterlist and dma-debug.
   These are tagged for -stable.  The scatterlist impact is potentially
  corrupted dma addresses on HIGHMEM enabled platforms.

 - A minor locking fix for the NFIT hot-add implementation that is new
   in 4.4-rc.  This would only trigger in the case a hot-add raced
   driver removal.

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  dma-debug: Fix dma_debug_entry offset calculation
  Revert "scatterlist: use sg_phys()"
  nfit: acpi_nfit_notify(): Do not leave device locked
This commit is contained in:
Linus Torvalds 2015-12-17 11:20:13 -08:00
commit d7637d01be
7 changed files with 11 additions and 10 deletions
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2
arch/arm/mm/dma-mapping.c
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@ -1521,7 +1521,7 @@ static int __map_sg_chunk(struct device *dev, struct scatterlist *sg,
return -ENOMEM;
for (count = 0, s = sg; count < (size >> PAGE_SHIFT); s = sg_next(s)) {
phys_addr_t phys = sg_phys(s) & PAGE_MASK;
phys_addr_t phys = page_to_phys(sg_page(s));
unsigned int len = PAGE_ALIGN(s->offset + s->length);
if (!is_coherent &&

3
arch/microblaze/kernel/dma.c
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@ -61,7 +61,8 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
/* FIXME this part of code is untested */
for_each_sg(sgl, sg, nents, i) {
sg->dma_address = sg_phys(sg);
__dma_sync(sg_phys(sg), sg->length, direction);
__dma_sync(page_to_phys(sg_page(sg)) + sg->offset,
sg->length, direction);
}
return nents;

2
drivers/acpi/nfit.c
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@ -1810,7 +1810,7 @@ static void acpi_nfit_notify(struct acpi_device *adev, u32 event)
if (!dev->driver) {
/* dev->driver may be null if we're being removed */
dev_dbg(dev, "%s: no driver found for dev\n", __func__);
return;
goto out_unlock;
}
if (!acpi_desc) {

4
drivers/iommu/intel-iommu.c
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@ -2159,7 +2159,7 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn,
sg_res = aligned_nrpages(sg->offset, sg->length);
sg->dma_address = ((dma_addr_t)iov_pfn << VTD_PAGE_SHIFT) + sg->offset;
sg->dma_length = sg->length;
pteval = (sg_phys(sg) & PAGE_MASK) | prot;
pteval = page_to_phys(sg_page(sg)) | prot;
phys_pfn = pteval >> VTD_PAGE_SHIFT;
}
@ -3704,7 +3704,7 @@ static int intel_nontranslate_map_sg(struct device *hddev,
for_each_sg(sglist, sg, nelems, i) {
BUG_ON(!sg_page(sg));
sg->dma_address = sg_phys(sg);
sg->dma_address = page_to_phys(sg_page(sg)) + sg->offset;
sg->dma_length = sg->length;
}
return nelems;

2
drivers/iommu/iommu.c
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@ -1430,7 +1430,7 @@ size_t default_iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
min_pagesz = 1 << __ffs(domain->ops->pgsize_bitmap);
for_each_sg(sg, s, nents, i) {
phys_addr_t phys = sg_phys(s);
phys_addr_t phys = page_to_phys(sg_page(s)) + s->offset;
/*
* We are mapping on IOMMU page boundaries, so offset within

4
drivers/staging/android/ion/ion_chunk_heap.c
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@ -81,7 +81,7 @@ static int ion_chunk_heap_allocate(struct ion_heap *heap,
err:
sg = table->sgl;
for (i -= 1; i >= 0; i--) {
gen_pool_free(chunk_heap->pool, sg_phys(sg) & PAGE_MASK,
gen_pool_free(chunk_heap->pool, page_to_phys(sg_page(sg)),
sg->length);
sg = sg_next(sg);
}
@ -109,7 +109,7 @@ static void ion_chunk_heap_free(struct ion_buffer *buffer)
DMA_BIDIRECTIONAL);
for_each_sg(table->sgl, sg, table->nents, i) {
gen_pool_free(chunk_heap->pool, sg_phys(sg) & PAGE_MASK,
gen_pool_free(chunk_heap->pool, page_to_phys(sg_page(sg)),
sg->length);
}
chunk_heap->allocated -= allocated_size;

4
lib/dma-debug.c
View File

@ -1464,7 +1464,7 @@ void debug_dma_alloc_coherent(struct device *dev, size_t size,
entry->type = dma_debug_coherent;
entry->dev = dev;
entry->pfn = page_to_pfn(virt_to_page(virt));
entry->offset = (size_t) virt & PAGE_MASK;
entry->offset = (size_t) virt & ~PAGE_MASK;
entry->size = size;
entry->dev_addr = dma_addr;
entry->direction = DMA_BIDIRECTIONAL;
@ -1480,7 +1480,7 @@ void debug_dma_free_coherent(struct device *dev, size_t size,
.type = dma_debug_coherent,
.dev = dev,
.pfn = page_to_pfn(virt_to_page(virt)),
.offset = (size_t) virt & PAGE_MASK,
.offset = (size_t) virt & ~PAGE_MASK,
.dev_addr = addr,
.size = size,
.direction = DMA_BIDIRECTIONAL,