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| author | Takashi Iwai <tiwai@suse.de> | 2010-04-13 11:33:54 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-04-13 12:01:14 +0200 |
| commit | d97e1b78239c7e7e441088e0b644bd3b076002e6 (patch) | |
| tree | b05b5085bea932662ce60061d5b4b93834683327 /sound/isa | |
| parent | 24e4a1211f691fc671de44685430dbad757d8487 (diff) | |
| download | lwn-d97e1b78239c7e7e441088e0b644bd3b076002e6.tar.gz lwn-d97e1b78239c7e7e441088e0b644bd3b076002e6.zip | |
ALSA: info - Check file position validity in common layer
Check the validity of the file position in the common info layer before
calling read or write callbacks in assumption that entry->size is set up
properly to indicate the max file size.
Removed the redundant checks from the callbacks as well.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/isa')
| -rw-r--r-- | sound/isa/gus/gus_mem_proc.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/sound/isa/gus/gus_mem_proc.c b/sound/isa/gus/gus_mem_proc.c index b2d2dba6c860..faa2bec8f6b6 100644 --- a/sound/isa/gus/gus_mem_proc.c +++ b/sound/isa/gus/gus_mem_proc.c @@ -36,20 +36,14 @@ static ssize_t snd_gf1_mem_proc_dump(struct snd_info_entry *entry, struct file *file, char __user *buf, size_t count, loff_t pos) { - long size; struct gus_proc_private *priv = entry->private_data; struct snd_gus_card *gus = priv->gus; int err; - size = count; - if (pos + size > priv->size) - size = (long)priv->size - pos; - if (size > 0) { - if ((err = snd_gus_dram_read(gus, buf, pos, size, priv->rom)) < 0) - return err; - return size; - } - return 0; + err = snd_gus_dram_read(gus, buf, pos, count, priv->rom); + if (err < 0) + return err; + return count; } static loff_t snd_gf1_mem_proc_llseek(struct snd_info_entry *entry, |