In former commit, actual operations of each ioctl command get argument in kernel space. Copying from/to user space is performed outside of the function.
This commit optimizes to the new design.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/core/seq/seq_clientmgr.c | 40 +++++++++++++++------------------------- 1 file changed, 15 insertions(+), 25 deletions(-)
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index e346786..36ac29f 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1255,30 +1255,27 @@ static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client, /* * CREATE PORT ioctl() */ -static int snd_seq_ioctl_create_port(struct snd_seq_client *client, - void __user *arg) +static int snd_seq_ioctl_create_port(struct snd_seq_client *client, void *arg) { + struct snd_seq_port_info *info = arg; struct snd_seq_client_port *port; - struct snd_seq_port_info info; struct snd_seq_port_callback *callback;
- if (copy_from_user(&info, arg, sizeof(info))) - return -EFAULT; - /* it is not allowed to create the port for an another client */ - if (info.addr.client != client->number) + if (info->addr.client != client->number) return -EPERM;
- port = snd_seq_create_port(client, (info.flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info.addr.port : -1); + port = snd_seq_create_port(client, (info->flags & SNDRV_SEQ_PORT_FLG_GIVEN_PORT) ? info->addr.port : -1); if (port == NULL) return -ENOMEM;
- if (client->type == USER_CLIENT && info.kernel) { + if (client->type == USER_CLIENT && info->kernel) { snd_seq_delete_port(client, port->addr.port); return -EINVAL; } if (client->type == KERNEL_CLIENT) { - if ((callback = info.kernel) != NULL) { + callback = info->kernel; + if (callback != NULL) { if (callback->owner) port->owner = callback->owner; port->private_data = callback->private_data; @@ -1291,37 +1288,30 @@ static int snd_seq_ioctl_create_port(struct snd_seq_client *client, } }
- info.addr = port->addr; + info->addr = port->addr;
- snd_seq_set_port_info(port, &info); + snd_seq_set_port_info(port, info); snd_seq_system_client_ev_port_start(port->addr.client, port->addr.port);
- if (copy_to_user(arg, &info, sizeof(info))) - return -EFAULT; - return 0; }
/* * DELETE PORT ioctl() */ -static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, - void __user *arg) +static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, void *arg) { - struct snd_seq_port_info info; + struct snd_seq_port_info *info = arg; int err;
- /* set passed parameters */ - if (copy_from_user(&info, arg, sizeof(info))) - return -EFAULT; - /* it is not allowed to remove the port for an another client */ - if (info.addr.client != client->number) + if (info->addr.client != client->number) return -EPERM;
- err = snd_seq_delete_port(client, info.addr.port); + err = snd_seq_delete_port(client, info->addr.port); if (err >= 0) - snd_seq_system_client_ev_port_exit(client->number, info.addr.port); + snd_seq_system_client_ev_port_exit(client->number, + info->addr.port); return err; }