Former commits change existent functions so that they don't handle data in kernel space. Copying from/to userspace is done outside of the functions, thus no need to change address limit of running task.
This commit obsoletes get_fs()/set_fs() and applies corresponding changes.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/core/seq/seq_clientmgr.c | 73 +++--------------------------------------- sound/core/seq/seq_compat.c | 12 ++----- 2 files changed, 7 insertions(+), 78 deletions(-)
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index e07a539..286394b 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -87,21 +87,6 @@ static int snd_seq_deliver_single_event(struct snd_seq_client *client,
/* */ - -static inline mm_segment_t snd_enter_user(void) -{ - mm_segment_t fs = get_fs(); - set_fs(get_ds()); - return fs; -} - -static inline void snd_leave_user(mm_segment_t fs) -{ - set_fs(fs); -} - -/* - */ static inline unsigned short snd_seq_file_flags(struct file *file) { switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { @@ -2094,14 +2079,8 @@ static const struct ioctl_handler { { 0, NULL }, };
-static struct seq_ioctl_table { - unsigned int cmd; - int (*func)(struct snd_seq_client *client, void __user * arg); -} ioctl_tables[] = { - { 0, NULL }, -}; - -static long seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +static long snd_seq_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) { struct snd_seq_client *client = file->private_data; /* To use kernel stack for ioctl data. */ @@ -2158,45 +2137,6 @@ static long seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) return err; }
-static int snd_seq_do_ioctl(struct snd_seq_client *client, unsigned int cmd, - void __user *arg) -{ - struct seq_ioctl_table *p; - - switch (cmd) { - case SNDRV_SEQ_IOCTL_PVERSION: - /* return sequencer version number */ - return put_user(SNDRV_SEQ_VERSION, (int __user *)arg) ? -EFAULT : 0; - case SNDRV_SEQ_IOCTL_CLIENT_ID: - /* return the id of this client */ - return put_user(client->number, (int __user *)arg) ? -EFAULT : 0; - } - - if (! arg) - return -EFAULT; - for (p = ioctl_tables; p->cmd; p++) { - if (p->cmd == cmd) - return p->func(client, arg); - } - pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n", - cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); - return -ENOTTY; -} - - -static long snd_seq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - struct snd_seq_client *client = file->private_data; - - if (seq_ioctl(file, cmd, arg) >= 0) - return 0; - - if (snd_BUG_ON(!client)) - return -ENXIO; - - return snd_seq_do_ioctl(client, cmd, (void __user *) arg); -} - #ifdef CONFIG_COMPAT #include "seq_compat.c" #else @@ -2396,8 +2336,6 @@ int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) { const struct ioctl_handler *handler; struct snd_seq_client *client; - mm_segment_t fs; - int result;
client = clientptr(clientid); if (client == NULL) @@ -2408,10 +2346,9 @@ int snd_seq_kernel_client_ctl(int clientid, unsigned int cmd, void *arg) return handler->func(client, arg); }
- fs = snd_enter_user(); - result = snd_seq_do_ioctl(client, cmd, (void __force __user *)arg); - snd_leave_user(fs); - return result; + pr_debug("ALSA: seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n", + cmd, _IOC_TYPE(cmd), _IOC_NR(cmd)); + return -ENOTTY; }
EXPORT_SYMBOL(snd_seq_kernel_client_ctl); diff --git a/sound/core/seq/seq_compat.c b/sound/core/seq/seq_compat.c index 4cfc505..fce5697 100644 --- a/sound/core/seq/seq_compat.c +++ b/sound/core/seq/seq_compat.c @@ -47,7 +47,6 @@ static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned { int err = -EFAULT; struct snd_seq_port_info *data; - mm_segment_t fs;
data = kmalloc(sizeof(*data), GFP_KERNEL); if (!data) @@ -59,12 +58,7 @@ static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned goto error; data->kernel = NULL;
- if (snd_seq_kernel_client_ctl(client->number, cmd, &data) >= 0) - return 0; - - fs = snd_enter_user(); - err = snd_seq_do_ioctl(client, cmd, data); - snd_leave_user(fs); + err = snd_seq_kernel_client_ctl(client->number, cmd, &data); if (err < 0) goto error;
@@ -126,9 +120,7 @@ static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned l case SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION: case SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT: case SNDRV_SEQ_IOCTL_RUNNING_MODE: - if (seq_ioctl(file, cmd, arg) >= 0) - return 0; - return snd_seq_do_ioctl(client, cmd, argp); + return snd_seq_ioctl(file, cmd, arg); case SNDRV_SEQ_IOCTL_CREATE_PORT32: return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, argp); case SNDRV_SEQ_IOCTL_DELETE_PORT32: