From 04db0dde0ee1c29110642dff57fba9e438eb805c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Goddard=20Rosa?= Date: Tue, 23 Feb 2010 04:04:25 -0300 Subject: [PATCH] mqueue: simplify do_open() error handling MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It reduces code size: text data bss dec hex filename 9925 72 16 10013 271d ipc/mqueue-BEFORE.o 9885 72 16 9973 26f5 ipc/mqueue-AFTER.o Signed-off-by: André Goddard Rosa Signed-off-by: Al Viro --- ipc/mqueue.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 15eabf9d51fd..3853116a2ef8 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -657,24 +657,28 @@ out: static struct file *do_open(struct ipc_namespace *ipc_ns, struct dentry *dentry, int oflag) { + int ret; const struct cred *cred = current_cred(); static const int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE, MAY_READ | MAY_WRITE }; if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY)) { - dput(dentry); - mntput(ipc_ns->mq_mnt); - return ERR_PTR(-EINVAL); + ret = -EINVAL; + goto err; } if (inode_permission(dentry->d_inode, oflag2acc[oflag & O_ACCMODE])) { - dput(dentry); - mntput(ipc_ns->mq_mnt); - return ERR_PTR(-EACCES); + ret = -EACCES; + goto err; } return dentry_open(dentry, ipc_ns->mq_mnt, oflag, cred); + +err: + dput(dentry); + mntput(ipc_ns->mq_mnt); + return ERR_PTR(ret); } SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, mode_t, mode,