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HFI1: compute SDMA pkt length taking large pages into account

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This commit is contained in:
Balazs Gerofi
2017-08-20 12:01:33 +09:00
parent 52e8f03b4b
commit 6406a0df6b
1 changed files with 4 additions and 14 deletions
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18
kernel/user_sdma.c
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@@ -1460,20 +1460,10 @@ static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts)
len = offset + req->info.fragsize > PAGE_SIZE ?
PAGE_SIZE - offset : req->info.fragsize;
#else
/*
* This doesn't appear to work. Perhaps the card
* doesn't like it if the physical range in an SDMA
* descriptor crosses page boundaries??
*/
/*
len = virt + req->info.fragsize >
base_virt + base_pgsize ?
base_virt + base_pgsize - virt : req->info.fragsize;
*/
offset = offset_in_page(base + iovec->offset +
iov_offset);
len = offset + req->info.fragsize > PAGE_SIZE ?
PAGE_SIZE - offset : req->info.fragsize;
len = iovec->phys ? req->info.fragsize :
((base_virt + base_pgsize - virt) >
req->info.fragsize) ? req->info.fragsize :
(base_virt + base_pgsize - virt);
#endif
len = min((datalen - queued), len);
SDMA_DBG("%s: dl: %d, qd: %d, len: %d\n",