From 670986ec01c1129db114b7720826a80756c7e899 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 1 Sep 2017 17:39:18 +0200 Subject: [PATCH] net/9p: switch p9_fd_read to kernel_write Instead of playing with the addressing limits. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro --- net/9p/trans_fd.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c index f12815777beb..903a190319b9 100644 --- a/net/9p/trans_fd.c +++ b/net/9p/trans_fd.c @@ -422,8 +422,7 @@ static void p9_read_work(struct work_struct *work) static int p9_fd_write(struct p9_client *client, void *v, int len) { - int ret; - mm_segment_t oldfs; + ssize_t ret; struct p9_trans_fd *ts = NULL; if (client && client->status != Disconnected) @@ -435,12 +434,7 @@ static int p9_fd_write(struct p9_client *client, void *v, int len) if (!(ts->wr->f_flags & O_NONBLOCK)) p9_debug(P9_DEBUG_ERROR, "blocking write ...\n"); - oldfs = get_fs(); - set_fs(get_ds()); - /* The cast to a user pointer is valid due to the set_fs() */ - ret = vfs_write(ts->wr, (__force void __user *)v, len, &ts->wr->f_pos); - set_fs(oldfs); - + ret = kernel_write(ts->wr, v, len, &ts->wr->f_pos); if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN) client->status = Disconnected; return ret;