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media: cec: integrate cec_validate_phys_addr() in cec-api.c

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[ Upstream commit e81bff39489a06384822bb38ce7a59f9e365bbe9 ]

The cec_phys_addr_validate() function will be moved to V4L2,
so use a simplified variant of that function in cec-api.c.
cec now no longer calls cec_phys_addr_validate() and it can
be safely moved to V4L2.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: <stable@vger.kernel.org>      # for v4.17 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
This commit is contained in:
Hans Verkuil 2018-09-13 03:36:29 -04:00 committed by Greg Kroah-Hartman
parent c93155fed0
commit b19c00ce7d
1 changed files with 18 additions and 1 deletions
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19
drivers/media/cec/cec-api.c
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@ -113,6 +113,23 @@ static long cec_adap_g_phys_addr(struct cec_adapter *adap,
return 0;
}
static int cec_validate_phys_addr(u16 phys_addr)
{
int i;
if (phys_addr == CEC_PHYS_ADDR_INVALID)
return 0;
for (i = 0; i < 16; i += 4)
if (phys_addr & (0xf << i))
break;
if (i == 16)
return 0;
for (i += 4; i < 16; i += 4)
if ((phys_addr & (0xf << i)) == 0)
return -EINVAL;
return 0;
}
static long cec_adap_s_phys_addr(struct cec_adapter *adap, struct cec_fh *fh,
bool block, __u16 __user *parg)
{
@ -124,7 +141,7 @@ static long cec_adap_s_phys_addr(struct cec_adapter *adap, struct cec_fh *fh,
if (copy_from_user(&phys_addr, parg, sizeof(phys_addr)))
return -EFAULT;
err = cec_phys_addr_validate(phys_addr, NULL, NULL);
err = cec_validate_phys_addr(phys_addr);
if (err)
return err;
mutex_lock(&adap->lock);