[media] ddbridge: fix compiler warnings

'off' was unused and 'ret' really had to be used to return -EFAULT.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/ddbridge/ddbridge-core.c b/drivers/media/dvb/ddbridge/ddbridge-core.c
index fe56703cecfb16c2488abea40f49faccd15ce216..ba9a643b9c6a6f7241cdebf9557b8fb188992b91 100644 (file)
--- a/drivers/media/dvb/ddbridge/ddbridge-core.c
+++ b/drivers/media/dvb/ddbridge/ddbridge-core.c
@@ -507,15 +507,14 @@ static u32 ddb_input_avail(struct ddb_input *input)
        return 0;
 }
 
-static size_t ddb_input_read(struct ddb_input *input, u8 *buf, size_t count)
+static ssize_t ddb_input_read(struct ddb_input *input, u8 *buf, size_t count)
 {
        struct ddb *dev = input->port->dev;
        u32 left = count;
-       u32 idx, off, free, stat = input->stat;
+       u32 idx, free, stat = input->stat;
        int ret;
 
        idx = (stat >> 11) & 0x1f;
-       off = (stat & 0x7ff) << 7;
 
        while (left) {
                if (input->cbuf == idx)
@@ -525,6 +524,8 @@ static size_t ddb_input_read(struct ddb_input *input, u8 *buf, size_t count)
                        free = left;
                ret = copy_to_user(buf, input->vbuf[input->cbuf] +
                                   input->coff, free);
+               if (ret)
+                       return -EFAULT;
                input->coff += free;
                if (input->coff == input->dma_buf_size) {
                        input->coff = 0;
@@ -939,6 +940,8 @@ static ssize_t ts_read(struct file *file, char *buf,
                                break;
                }
                read = ddb_input_read(input, buf, left);
+               if (read < 0)
+                       return read;
                left -= read;
                buf += read;
        }