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 | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-)
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 3e7431e..46e040b 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1227,28 +1227,24 @@ static int seq_ioctl_get_client_info(struct snd_seq_client *client, void *arg)
/* CLIENT_INFO ioctl() */ -static int seq_ioctl_set_client_info(struct snd_seq_client *client, - void __user *arg) +static int seq_ioctl_set_client_info(struct snd_seq_client *client, void *arg) { - struct snd_seq_client_info client_info; - - if (copy_from_user(&client_info, arg, sizeof(client_info))) - return -EFAULT; + struct snd_seq_client_info *client_info = arg;
/* it is not allowed to set the info fields for an another client */ - if (client->number != client_info.client) + if (client->number != client_info->client) return -EPERM; /* also client type must be set now */ - if (client->type != client_info.type) + if (client->type != client_info->type) return -EINVAL;
/* fill the info fields */ - if (client_info.name[0]) - strlcpy(client->name, client_info.name, sizeof(client->name)); + if (client_info->name[0]) + strlcpy(client->name, client_info->name, sizeof(client->name));
- client->filter = client_info.filter; - client->event_lost = client_info.event_lost; - memcpy(client->event_filter, client_info.event_filter, 32); + client->filter = client_info->filter; + client->event_lost = client_info->event_lost; + memcpy(client->event_filter, client_info->event_filter, 32);
return 0; }