3.16-stable review patch. If anyone has any objections, please let me know.
------------------ From: Weston Andros Adamson <[email protected]> commit bfd484a5606d6a0379a0a2f04251b1e5c1f8995c upstream. __nfs_pageio_add_request was calling nfs_page_group_lock nonblocking, but this can return -EAGAIN which would end up passing -EIO to the application. There is no reason not to block in this path, so change the two calls to do so. Also, there is no need to check the return value of nfs_page_group_lock when nonblock=false, so remove the error handling code. Signed-off-by: Weston Andros Adamson <[email protected]> Reviewed-by: Peng Tao <[email protected]> Signed-off-by: Trond Myklebust <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- fs/nfs/pagelist.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -873,13 +873,8 @@ static int __nfs_pageio_add_request(stru struct nfs_page *subreq; unsigned int bytes_left = 0; unsigned int offset, pgbase; - int ret; - ret = nfs_page_group_lock(req, true); - if (ret < 0) { - desc->pg_error = ret; - return 0; - } + nfs_page_group_lock(req, false); subreq = req; bytes_left = subreq->wb_bytes; @@ -901,11 +896,7 @@ static int __nfs_pageio_add_request(stru if (desc->pg_recoalesce) return 0; /* retry add_request for this subreq */ - ret = nfs_page_group_lock(req, true); - if (ret < 0) { - desc->pg_error = ret; - return 0; - } + nfs_page_group_lock(req, false); continue; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
