From: Daniel Scheller <d.schel...@gmx.net>

Fixes two warnings reported by smatch:

  drivers/media/pci/ddbridge/ddbridge-core.c:240 ddb_redirect() warn: variable 
dereferenced before check 'idev' (see line 238)
  drivers/media/pci/ddbridge/ddbridge-core.c:240 ddb_redirect() warn: variable 
dereferenced before check 'pdev' (see line 238)

Fixed by moving the existing checks up before accessing members.

Cc: Ralph Metzler <r...@metzlerbros.de>
Signed-off-by: Daniel Scheller <d.schel...@gmx.net>
Tested-by: Richard Scobie <r.sco...@clear.net.nz>
Tested-by: Jasmin Jessich <jas...@anw.at>
Tested-by: Dietmar Spingler <d_sping...@freenet.de>
Tested-by: Manfred Knick <manfred.kn...@t-online.de>
---
 drivers/media/pci/ddbridge/ddbridge-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c 
b/drivers/media/pci/ddbridge/ddbridge-core.c
index 08440dcb5e6f..12bc8de980b5 100644
--- a/drivers/media/pci/ddbridge/ddbridge-core.c
+++ b/drivers/media/pci/ddbridge/ddbridge-core.c
@@ -170,10 +170,10 @@ static int ddb_redirect(u32 i, u32 p)
        struct ddb *pdev = ddbs[(p >> 4) & 0x3f];
        struct ddb_port *port;
 
-       if (!idev->has_dma || !pdev->has_dma)
-               return -EINVAL;
        if (!idev || !pdev)
                return -EINVAL;
+       if (!idev->has_dma || !pdev->has_dma)
+               return -EINVAL;
 
        port = &pdev->port[p & 0x0f];
        if (!port->output)
-- 
2.13.0

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