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[media] ivtv: fix register range check

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Ensure that the register is aligned to a dword, otherwise the range check
could fail since it assumes dword alignment.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2013-05-29 07:00:10 -03:00 committed by Mauro Carvalho Chehab
parent 771d77339b
commit e9dab58970
1 changed files with 2 additions and 0 deletions
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2
drivers/media/pci/ivtv/ivtv-ioctl.c
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@ -696,6 +696,8 @@ static int ivtv_itvc(struct ivtv *itv, bool get, u64 reg, u64 *val)
{
volatile u8 __iomem *reg_start;
if (reg & 0x3)
return -EINVAL;
if (reg >= IVTV_REG_OFFSET && reg < IVTV_REG_OFFSET + IVTV_REG_SIZE)
reg_start = itv->reg_mem - IVTV_REG_OFFSET;
else if (itv->has_cx23415 && reg >= IVTV_DECODER_OFFSET &&