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 | 68 +++++++++++++++++++----------------------- 1 file changed, 31 insertions(+), 37 deletions(-)
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 5f3489b..9998632 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -1805,78 +1805,72 @@ static int snd_seq_ioctl_set_queue_client(struct snd_seq_client *client,
/* GET_CLIENT_POOL ioctl() */ static int snd_seq_ioctl_get_client_pool(struct snd_seq_client *client, - void __user *arg) + void *arg) { - struct snd_seq_client_pool info; + struct snd_seq_client_pool *info = arg; struct snd_seq_client *cptr;
- if (copy_from_user(&info, arg, sizeof(info))) - return -EFAULT; - - cptr = snd_seq_client_use_ptr(info.client); + cptr = snd_seq_client_use_ptr(info->client); if (cptr == NULL) return -ENOENT; - memset(&info, 0, sizeof(info)); - info.client = cptr->number; - info.output_pool = cptr->pool->size; - info.output_room = cptr->pool->room; - info.output_free = info.output_pool; - info.output_free = snd_seq_unused_cells(cptr->pool); + memset(info, 0, sizeof(*info)); + info->client = cptr->number; + info->output_pool = cptr->pool->size; + info->output_room = cptr->pool->room; + info->output_free = info->output_pool; + info->output_free = snd_seq_unused_cells(cptr->pool); if (cptr->type == USER_CLIENT) { - info.input_pool = cptr->data.user.fifo_pool_size; - info.input_free = info.input_pool; + info->input_pool = cptr->data.user.fifo_pool_size; + info->input_free = info->input_pool; if (cptr->data.user.fifo) - info.input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); + info->input_free = snd_seq_unused_cells(cptr->data.user.fifo->pool); } else { - info.input_pool = 0; - info.input_free = 0; + info->input_pool = 0; + info->input_free = 0; } snd_seq_client_unlock(cptr); - if (copy_to_user(arg, &info, sizeof(info))) - return -EFAULT; return 0; }
/* SET_CLIENT_POOL ioctl() */ static int snd_seq_ioctl_set_client_pool(struct snd_seq_client *client, - void __user *arg) + void *arg) { - struct snd_seq_client_pool info; + struct snd_seq_client_pool *info = arg; int rc;
- if (copy_from_user(&info, arg, sizeof(info))) - return -EFAULT; - - if (client->number != info.client) + if (client->number != info->client) return -EINVAL; /* can't change other clients */
- if (info.output_pool >= 1 && info.output_pool <= SNDRV_SEQ_MAX_EVENTS && - (! snd_seq_write_pool_allocated(client) || - info.output_pool != client->pool->size)) { + if (info->output_pool >= 1 && + info->output_pool <= SNDRV_SEQ_MAX_EVENTS && + (!snd_seq_write_pool_allocated(client) || + info->output_pool != client->pool->size)) { if (snd_seq_write_pool_allocated(client)) { /* remove all existing cells */ snd_seq_queue_client_leave_cells(client->number); snd_seq_pool_done(client->pool); } - client->pool->size = info.output_pool; + client->pool->size = info->output_pool; rc = snd_seq_pool_init(client->pool); if (rc < 0) return rc; } if (client->type == USER_CLIENT && client->data.user.fifo != NULL && - info.input_pool >= 1 && - info.input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && - info.input_pool != client->data.user.fifo_pool_size) { + info->input_pool >= 1 && + info->input_pool <= SNDRV_SEQ_MAX_CLIENT_EVENTS && + info->input_pool != client->data.user.fifo_pool_size) { /* change pool size */ - rc = snd_seq_fifo_resize(client->data.user.fifo, info.input_pool); + rc = snd_seq_fifo_resize(client->data.user.fifo, + info->input_pool); if (rc < 0) return rc; - client->data.user.fifo_pool_size = info.input_pool; + client->data.user.fifo_pool_size = info->input_pool; } - if (info.output_room >= 1 && - info.output_room <= client->pool->size) { - client->pool->room = info.output_room; + if (info->output_room >= 1 && + info->output_room <= client->pool->size) { + client->pool->room = info->output_room; }
return snd_seq_ioctl_get_client_pool(client, arg);