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genwqe: fix MAX_ORDER usage
MAX_ORDER is not inclusive: the maximum allocation order buddy allocator can deliver is MAX_ORDER-1. Fix MAX_ORDER usage in genwqe driver. Link: https://lkml.kernel.org/r/20230315113133.11326-6-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Frank Haverkamp <haver@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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2 changed files with 2 additions and 2 deletions
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@ -443,7 +443,7 @@ static int genwqe_mmap(struct file *filp, struct vm_area_struct *vma)
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if (vsize == 0)
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if (vsize == 0)
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return -EINVAL;
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return -EINVAL;
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if (get_order(vsize) > MAX_ORDER)
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if (get_order(vsize) >= MAX_ORDER)
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return -ENOMEM;
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return -ENOMEM;
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dma_map = kzalloc(sizeof(struct dma_mapping), GFP_KERNEL);
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dma_map = kzalloc(sizeof(struct dma_mapping), GFP_KERNEL);
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@ -308,7 +308,7 @@ int genwqe_alloc_sync_sgl(struct genwqe_dev *cd, struct genwqe_sgl *sgl,
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sgl->write = write;
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sgl->write = write;
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sgl->sgl_size = genwqe_sgl_size(sgl->nr_pages);
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sgl->sgl_size = genwqe_sgl_size(sgl->nr_pages);
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if (get_order(sgl->sgl_size) > MAX_ORDER) {
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if (get_order(sgl->sgl_size) >= MAX_ORDER) {
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dev_err(&pci_dev->dev,
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dev_err(&pci_dev->dev,
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"[%s] err: too much memory requested!\n", __func__);
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"[%s] err: too much memory requested!\n", __func__);
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return ret;
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return ret;
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