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 | 29 ++++++++++------------------- 1 file changed, 10 insertions(+), 19 deletions(-)
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 36ac29f..7815f88 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1319,32 +1319,27 @@ static int snd_seq_ioctl_delete_port(struct snd_seq_client *client, void *arg) /* * GET_PORT_INFO ioctl() (on any client) */ -static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, - void __user *arg) +static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, void *arg) { + struct snd_seq_port_info *info = arg; struct snd_seq_client *cptr; struct snd_seq_client_port *port; - struct snd_seq_port_info info;
- if (copy_from_user(&info, arg, sizeof(info))) - return -EFAULT; - cptr = snd_seq_client_use_ptr(info.addr.client); + cptr = snd_seq_client_use_ptr(info->addr.client); if (cptr == NULL) return -ENXIO;
- port = snd_seq_port_use_ptr(cptr, info.addr.port); + port = snd_seq_port_use_ptr(cptr, info->addr.port); if (port == NULL) { snd_seq_client_unlock(cptr); return -ENOENT; /* don't change */ }
/* get port info */ - snd_seq_get_port_info(port, &info); + snd_seq_get_port_info(port, info); snd_seq_port_unlock(port); snd_seq_client_unlock(cptr);
- if (copy_to_user(arg, &info, sizeof(info))) - return -EFAULT; return 0; }
@@ -1352,20 +1347,16 @@ static int snd_seq_ioctl_get_port_info(struct snd_seq_client *client, /* * SET_PORT_INFO ioctl() (only ports on this/own client) */ -static int snd_seq_ioctl_set_port_info(struct snd_seq_client *client, - void __user *arg) +static int snd_seq_ioctl_set_port_info(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; - - if (copy_from_user(&info, arg, sizeof(info))) - return -EFAULT;
- if (info.addr.client != client->number) /* only set our own ports ! */ + if (info->addr.client != client->number) /* only set our own ports ! */ return -EPERM; - port = snd_seq_port_use_ptr(client, info.addr.port); + port = snd_seq_port_use_ptr(client, info->addr.port); if (port) { - snd_seq_set_port_info(port, &info); + snd_seq_set_port_info(port, info); snd_seq_port_unlock(port); } return 0;