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Just one RDMA bugfix.

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Merge tag 'nfsd-4.3-1' of git://linux-nfs.org/~bfields/linux

Pull nfsd bugfix from Bruce Fields:
 "Just one RDMA bugfix"

* tag 'nfsd-4.3-1' of git://linux-nfs.org/~bfields/linux:
  svcrdma: handle rdma read with a non-zero initial page offset
This commit is contained in:
Linus Torvalds 2015-10-09 16:34:45 -07:00
commit 38aa0a59a6
1 changed files with 4 additions and 2 deletions
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6
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
View file

@ -136,7 +136,8 @@ int rdma_read_chunk_lcl(struct svcxprt_rdma *xprt,
ctxt->direction = DMA_FROM_DEVICE;
ctxt->read_hdr = head;
pages_needed = min_t(int, pages_needed, xprt->sc_max_sge_rd);
read = min_t(int, pages_needed << PAGE_SHIFT, rs_length);
read = min_t(int, (pages_needed << PAGE_SHIFT) - *page_offset,
rs_length);
for (pno = 0; pno < pages_needed; pno++) {
int len = min_t(int, rs_length, PAGE_SIZE - pg_off);
@ -235,7 +236,8 @@ int rdma_read_chunk_frmr(struct svcxprt_rdma *xprt,
ctxt->direction = DMA_FROM_DEVICE;
ctxt->frmr = frmr;
pages_needed = min_t(int, pages_needed, xprt->sc_frmr_pg_list_len);
read = min_t(int, pages_needed << PAGE_SHIFT, rs_length);
read = min_t(int, (pages_needed << PAGE_SHIFT) - *page_offset,
rs_length);
frmr->kva = page_address(rqstp->rq_arg.pages[pg_no]);
frmr->direction = DMA_FROM_DEVICE;