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@xxxxxxxxxxxxx>
---
sound/core/seq/seq_clientmgr.c | 22 ++++++++--------------
1 file changed, 8 insertions(+), 14 deletions(-)
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index e4a9754..0f840ca 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -1988,32 +1988,26 @@ static int seq_ioctl_query_subs(struct snd_seq_client *client, void *arg)
/*
* query next client
*/
-static int seq_ioctl_query_next_client(struct snd_seq_client *client,
- void __user *arg)
+static int seq_ioctl_query_next_client(struct snd_seq_client *client, void *arg)
{
+ struct snd_seq_client_info *info = arg;
struct snd_seq_client *cptr = NULL;
- struct snd_seq_client_info info;
-
- if (copy_from_user(&info, arg, sizeof(info)))
- return -EFAULT;
/* search for next client */
- info.client++;
- if (info.client < 0)
- info.client = 0;
- for (; info.client < SNDRV_SEQ_MAX_CLIENTS; info.client++) {
- cptr = snd_seq_client_use_ptr(info.client);
+ info->client++;
+ if (info->client < 0)
+ info->client = 0;
+ for (; info->client < SNDRV_SEQ_MAX_CLIENTS; info->client++) {
+ cptr = snd_seq_client_use_ptr(info->client);
if (cptr)
break; /* found */
}
if (cptr == NULL)
return -ENOENT;
- get_client_info(cptr, &info);
+ get_client_info(cptr, info);
snd_seq_client_unlock(cptr);
- if (copy_to_user(arg, &info, sizeof(info)))
- return -EFAULT;
return 0;
}
--
2.7.4
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