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| author | Mauro Carvalho Chehab | 2015-04-28 15:07:01 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab | 2015-04-30 18:34:08 +0200 |
| commit | 3c71d978c5e6dadfc798e84290014f713f56c97b (patch) | |
| tree | 54cb60e8875825037bd99ce6a0942b08f8fb9b96 /drivers/media/pci/saa7164 | |
| parent | [media] ngene: preventing dereferencing a NULL pointer (diff) | |
| download | kernel-qcow2-linux-3c71d978c5e6dadfc798e84290014f713f56c97b.tar.gz kernel-qcow2-linux-3c71d978c5e6dadfc798e84290014f713f56c97b.tar.xz kernel-qcow2-linux-3c71d978c5e6dadfc798e84290014f713f56c97b.zip | |
[media] saa7164: Check if dev is NULL before dereferencing it
As reported by smatch:
drivers/media/pci/saa7164/saa7164-core.c:631 saa7164_irq() warn: variable dereferenced before check 'dev' (see line 621)
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/pci/saa7164')
| -rw-r--r-- | drivers/media/pci/saa7164/saa7164-core.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/media/pci/saa7164/saa7164-core.c b/drivers/media/pci/saa7164/saa7164-core.c index 9cf3c6cba498..072dcc8f13d9 100644 --- a/drivers/media/pci/saa7164/saa7164-core.c +++ b/drivers/media/pci/saa7164/saa7164-core.c @@ -618,12 +618,7 @@ static irqreturn_t saa7164_irq_ts(struct saa7164_port *port) static irqreturn_t saa7164_irq(int irq, void *dev_id) { struct saa7164_dev *dev = dev_id; - struct saa7164_port *porta = &dev->ports[SAA7164_PORT_TS1]; - struct saa7164_port *portb = &dev->ports[SAA7164_PORT_TS2]; - struct saa7164_port *portc = &dev->ports[SAA7164_PORT_ENC1]; - struct saa7164_port *portd = &dev->ports[SAA7164_PORT_ENC2]; - struct saa7164_port *porte = &dev->ports[SAA7164_PORT_VBI1]; - struct saa7164_port *portf = &dev->ports[SAA7164_PORT_VBI2]; + struct saa7164_port *porta, *portb, *portc, *portd, *porte, *portf; u32 intid, intstat[INT_SIZE/4]; int i, handled = 0, bit; @@ -634,6 +629,13 @@ static irqreturn_t saa7164_irq(int irq, void *dev_id) goto out; } + porta = &dev->ports[SAA7164_PORT_TS1]; + portb = &dev->ports[SAA7164_PORT_TS2]; + portc = &dev->ports[SAA7164_PORT_ENC1]; + portd = &dev->ports[SAA7164_PORT_ENC2]; + porte = &dev->ports[SAA7164_PORT_VBI1]; + portf = &dev->ports[SAA7164_PORT_VBI2]; + /* Check that the hardware is accessible. If the status bytes are * 0xFF then the device is not accessible, the the IRQ belongs * to another driver. |