From d9df8d6b38228afab519094048aa2c082b0b2cf4 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 22 May 2007 10:22:20 -0400 Subject: [PATCH] NFS: Don't fail an O_DIRECT read/write if get_user_pages() returns pages There is no need to fail the entire O_DIRECT read/write just because get_user_pages() returned fewer pages than we requested. Signed-off-by: Trond Myklebust --- fs/nfs/direct.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 4c97e55e86..f1b153ad64 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -295,9 +295,14 @@ static ssize_t nfs_direct_read_schedule(struct nfs_direct_req *dreq, unsigned lo break; } if ((unsigned)result < data->npages) { - nfs_direct_release_pages(data->pagevec, result); - nfs_readdata_release(data); - break; + bytes = result * PAGE_SIZE; + if (bytes <= pgbase) { + nfs_direct_release_pages(data->pagevec, result); + nfs_readdata_release(data); + break; + } + bytes -= pgbase; + data->npages = result; } get_dreq(dreq); @@ -630,9 +635,14 @@ static ssize_t nfs_direct_write_schedule(struct nfs_direct_req *dreq, unsigned l break; } if ((unsigned)result < data->npages) { - nfs_direct_release_pages(data->pagevec, result); - nfs_writedata_release(data); - break; + bytes = result * PAGE_SIZE; + if (bytes <= pgbase) { + nfs_direct_release_pages(data->pagevec, result); + nfs_writedata_release(data); + break; + } + bytes -= pgbase; + data->npages = result; } get_dreq(dreq); -- 2.39.5