fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / sound / oss / emu10k1 / passthrough.c

diff --git a/sound/oss/emu10k1/passthrough.c b/sound/oss/emu10k1/passthrough.c
index 4e3baca..6d21d43 100644 (file)
--- a/sound/oss/emu10k1/passthrough.c
+++ b/sound/oss/emu10k1/passthrough.c
@@ -162,12 +162,15 @@ ssize_t emu10k1_pt_write(struct file *file, const char __user *buffer, size_t co
 
                DPD(3, "prepend size %d, prepending %d bytes\n", pt->prepend_size, needed);
                if (count < needed) {
-                       copy_from_user(pt->buf + pt->prepend_size, buffer, count);
+                       if (copy_from_user(pt->buf + pt->prepend_size,
+                                          buffer, count))
+                               return -EFAULT;
                        pt->prepend_size += count;
                        DPD(3, "prepend size now %d\n", pt->prepend_size);
                        return count;
                }
-               copy_from_user(pt->buf + pt->prepend_size, buffer, needed);
+               if (copy_from_user(pt->buf + pt->prepend_size, buffer, needed))
+                       return -EFAULT;
                r = pt_putblock(wave_dev, (u16 *) pt->buf, nonblock);
                if (r)
                        return r;
@@ -178,7 +181,8 @@ ssize_t emu10k1_pt_write(struct file *file, const char __user *buffer, size_t co
        blocks_copied = 0;
        while (blocks > 0) {
                u16 __user *bufptr = (u16 __user *) buffer + (bytes_copied/2);
-               copy_from_user(pt->buf, bufptr, PT_BLOCKSIZE);
+               if (copy_from_user(pt->buf, bufptr, PT_BLOCKSIZE))
+                       return -EFAULT;
                r = pt_putblock(wave_dev, (u16 *)pt->buf, nonblock);
                if (r) {
                        if (bytes_copied)
@@ -193,7 +197,8 @@ ssize_t emu10k1_pt_write(struct file *file, const char __user *buffer, size_t co
        i = count - bytes_copied;
        if (i) {
                pt->prepend_size = i;
-               copy_from_user(pt->buf, buffer + bytes_copied, i);
+               if (copy_from_user(pt->buf, buffer + bytes_copied, i))
+                       return -EFAULT;
                bytes_copied += i;
                DPD(3, "filling prepend buffer with %d bytes", i);
        }