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genwqe: fix MAX_ORDER usage

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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>
This commit is contained in:
Kirill A. Shutemov 2023-03-15 14:31:28 +03:00 committed by Andrew Morton
parent 50c00d2c68
commit fd54349ddb
2 changed files with 2 additions and 2 deletions
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2
drivers/misc/genwqe/card_dev.c
View File

@ -443,7 +443,7 @@ static int genwqe_mmap(struct file *filp, struct vm_area_struct *vma)
if (vsize == 0)
return -EINVAL;
if (get_order(vsize) > MAX_ORDER)
if (get_order(vsize) >= MAX_ORDER)
return -ENOMEM;
dma_map = kzalloc(sizeof(struct dma_mapping), GFP_KERNEL);

2
drivers/misc/genwqe/card_utils.c
View File

@ -308,7 +308,7 @@ int genwqe_alloc_sync_sgl(struct genwqe_dev *cd, struct genwqe_sgl *sgl,
sgl->write = write;
sgl->sgl_size = genwqe_sgl_size(sgl->nr_pages);
if (get_order(sgl->sgl_size) > MAX_ORDER) {
if (get_order(sgl->sgl_size) >= MAX_ORDER) {
dev_err(&pci_dev->dev,
"[%s] err: too much memory requested!\n", __func__);
return ret;