[PATCH] sound/oss/emu10k1: handle userspace copy errors

Propagate copy_to/from_user() errors back through callers.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/sound/oss/emu10k1/audio.c b/sound/oss/emu10k1/audio.c
index 86dd23974e0..49f902f35c2 100644
--- a/sound/oss/emu10k1/audio.c
+++ b/sound/oss/emu10k1/audio.c
@@ -111,9 +111,15 @@ static ssize_t emu10k1_audio_read(struct file *file, char __user *buffer, size_t
 
                 if ((bytestocopy >= wiinst->buffer.fragment_size)
                     || (bytestocopy >= count)) {
+                        int rc;
+
                         bytestocopy = min_t(u32, bytestocopy, count);
 
-                        emu10k1_wavein_xferdata(wiinst, (u8 __user *)buffer, &bytestocopy);
+                        rc = emu10k1_wavein_xferdata(wiinst,
+                                                     (u8 __user *)buffer,
+                                                     &bytestocopy);
+                        if (rc)
+                                return rc;
 
                         count -= bytestocopy;
                         buffer += bytestocopy;