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-rw-r--r--sound/core/info.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/sound/core/info.c b/sound/core/info.c
index 291d6ed80d80..8ab72e0f5932 100644
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -325,6 +325,8 @@ static ssize_t snd_info_text_entry_write(struct file *file,
size_t next;
int err = 0;
+ if (!entry->c.text.write)
+ return -EIO;
pos = *offset;
if (!valid_pos(pos, count))
return -EIO;
@@ -369,7 +371,9 @@ static int snd_info_seq_show(struct seq_file *seq, void *p)
struct snd_info_private_data *data = seq->private;
struct snd_info_entry *entry = data->entry;
- if (entry->c.text.read) {
+ if (!entry->c.text.read) {
+ return -EIO;
+ } else {
data->rbuffer->buffer = (char *)seq; /* XXX hack! */
entry->c.text.read(entry, data->rbuffer);
}