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| author | Yang Shi <yang.shi@windriver.com> | 2008-03-04 11:20:51 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-03-04 11:20:51 +0100 |
| commit | 419c434c35614609fd0c79d335c134bf4b88b30b (patch) | |
| tree | c2e076f6d0c61051dac3184f9f1255db1c680902 /block/blk-settings.c | |
| parent | e3790c7d42a545e8fe8b38b513613ca96687b670 (diff) | |
| download | lwn-419c434c35614609fd0c79d335c134bf4b88b30b.tar.gz lwn-419c434c35614609fd0c79d335c134bf4b88b30b.zip | |
Fix DMA access of block device in 64-bit kernel on some non-x86 systems with 4GB or upper 4GB memory
For some non-x86 systems with 4GB or upper 4GB memory,
we need increase the range of addresses that can be
used for direct DMA in 64-bit kernel.
Signed-off-by: Yang Shi <yang.shi@windriver.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-settings.c')
| -rw-r--r-- | block/blk-settings.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index a9f37f530b15..18fab5193d81 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -140,7 +140,7 @@ void blk_queue_bounce_limit(struct request_queue *q, u64 dma_addr) /* Assume anything <= 4GB can be handled by IOMMU. Actually some IOMMUs can handle everything, but I don't know of a way to test this here. */ - if (b_pfn < (min_t(u64, 0xffffffff, BLK_BOUNCE_HIGH) >> PAGE_SHIFT)) + if (b_pfn <= (min_t(u64, 0xffffffff, BLK_BOUNCE_HIGH) >> PAGE_SHIFT)) dma = 1; q->bounce_pfn = max_low_pfn; #else |