diff options
| author | Daniel Scheller <d.scheller@gmx.net> | 2017-08-12 07:55:55 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-08-20 07:06:21 -0400 |
| commit | e89e02a8654f3510114c72394753ab4977b754b3 (patch) | |
| tree | 1000a195b7623f2fbd565af95951ef4bded07a87 /drivers/media/pci/ddbridge/ddbridge-core.c | |
| parent | 69716934c7c5fdaf057dcbdb75da75d067f10e60 (diff) | |
media: ddbridge: check pointers before dereferencing
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 <rjkm@metzlerbros.de>
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Tested-by: Richard Scobie <r.scobie@clear.net.nz>
Tested-by: Jasmin Jessich <jasmin@anw.at>
Tested-by: Dietmar Spingler <d_spingler@freenet.de>
Tested-by: Manfred Knick <Manfred.Knick@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/pci/ddbridge/ddbridge-core.c')
| -rw-r--r-- | drivers/media/pci/ddbridge/ddbridge-core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c b/drivers/media/pci/ddbridge/ddbridge-core.c index bbd8d556175b..d7bf01f38d98 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) |