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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2013-04-22 21:27:17 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-04-23 12:18:16 +0400 |
| commit | 186f50fa568a221fdabd6753341c2de4abd24b78 (patch) | |
| tree | aec34a12d243f9819f1debc49a6f91481af6b6fd /arch/s390 | |
| parent | 63dd9b44ac926d3250c1e8dfcb309c37c870fe21 (diff) | |
| download | linux-186f50fa568a221fdabd6753341c2de4abd24b78.tar.xz | |
s390/pci: return correct dma address for offset > PAGE_SIZE
For offset > PAGE_SIZE, s390_dma_map_pages() will issue a warning
and return a wrong dma address.
This patch removes the warning and fixes the dma return address
calculation.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/pci/pci_dma.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c index 60e4999e6b67..f8e69d5bc0a9 100644 --- a/arch/s390/pci/pci_dma.c +++ b/arch/s390/pci/pci_dma.c @@ -269,8 +269,6 @@ static dma_addr_t s390_dma_map_pages(struct device *dev, struct page *page, int flags = ZPCI_PTE_VALID; dma_addr_t dma_addr; - WARN_ON_ONCE(offset > PAGE_SIZE); - /* This rounds up number of pages based on size and offset */ nr_pages = iommu_num_pages(pa, size, PAGE_SIZE); iommu_page_index = dma_alloc_iommu(zdev, nr_pages); @@ -292,7 +290,7 @@ static dma_addr_t s390_dma_map_pages(struct device *dev, struct page *page, if (!dma_update_trans(zdev, pa, dma_addr, size, flags)) { atomic64_add(nr_pages, (atomic64_t *) &zdev->fmb->mapped_pages); - return dma_addr + offset; + return dma_addr + (offset & ~PAGE_MASK); } out_free: |