From: Hans Verkuil <hans.verk...@cisco.com>
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.verk...@cisco.com>
Cc: Andy Walls <awa...@md.metrocast.net>
---
drivers/media/pci/ivtv/ivtv-ioctl.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/media/pci/ivtv/ivtv-ioctl.c
b/drivers/media/pci/ivtv/ivtv-ioctl.c
index 944300f..807b275 100644
--- a/drivers/media/pci/ivtv/ivtv-ioctl.c
+++ b/drivers/media/pci/ivtv/ivtv-ioctl.c
@@ -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 &&
--
1.7.10.4
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