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| author | Tejun Heo <tj@kernel.org> | 2008-09-24 16:22:23 -0500 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com> | 2008-09-24 16:22:23 -0500 |
| commit | ec3c68f232f6d98b4596c05c1c7551b44c617c5f (patch) | |
| tree | d00aac0a2ff78d9d45a8247139543b942fc87595 /net | |
| parent | 571ffeafffbfdd0b8f2f9d3b991028797ec87e42 (diff) | |
| download | linux-ec3c68f232f6d98b4596c05c1c7551b44c617c5f.tar.gz | |
9p-trans_fd: don't do fs segment mangling in p9_fd_poll()
p9_fd_poll() is never called with user pointers and f_op->poll() doesn't expect its arguments to be from userland. There's no need to set kernel ds before calling f_op->poll() from p9_fd_poll(). Remove it. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/9p/trans_fd.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c index 6c88e8983750..f6d4af16cb19 100644 --- a/net/9p/trans_fd.c +++ b/net/9p/trans_fd.c @@ -1344,7 +1344,6 @@ p9_fd_poll(struct p9_trans *trans, struct poll_table_struct *pt) { int ret, n; struct p9_trans_fd *ts = NULL; - mm_segment_t oldfs; if (trans && trans->status == Connected) ts = trans->priv; @@ -1358,24 +1357,17 @@ p9_fd_poll(struct p9_trans *trans, struct poll_table_struct *pt) if (!ts->wr->f_op || !ts->wr->f_op->poll) return -EIO; - oldfs = get_fs(); - set_fs(get_ds()); - ret = ts->rd->f_op->poll(ts->rd, pt); if (ret < 0) - goto end; + return ret; if (ts->rd != ts->wr) { n = ts->wr->f_op->poll(ts->wr, pt); - if (n < 0) { - ret = n; - goto end; - } + if (n < 0) + return n; ret = (ret & ~POLLOUT) | (n & ~POLLIN); } -end: - set_fs(oldfs); return ret; } |