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NVMe: Fix possible arithmetic overflow for max segments

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Reported-by: Paul Grabinar <paul.grabinar@ranbarg.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2015-11-18 16:33:08 -07:00 committed by Jens Axboe
parent 1b2ff19e6a
commit 6824c5ef5e
1 changed files with 1 additions and 1 deletions
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2
drivers/nvme/host/pci.c
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@ -2268,7 +2268,7 @@ static void nvme_alloc_ns(struct nvme_dev *dev, unsigned nsid)
if (dev->max_hw_sectors) {
blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors);
blk_queue_max_segments(ns->queue,
((dev->max_hw_sectors << 9) / dev->page_size) + 1);
(dev->max_hw_sectors / (dev->page_size >> 9)) + 1);
}
if (dev->stripe_size)
blk_queue_chunk_sectors(ns->queue, dev->stripe_size >> 9);