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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2018-09-13 09:36:29 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-09-24 15:11:01 +0200 |
| commit | e81bff39489a06384822bb38ce7a59f9e365bbe9 (patch) | |
| tree | 91a3d9df7135e08ce88abec0567e32c8318d5213 /drivers | |
| parent | media: cec: make cec_get_edid_spa_location() an inline function (diff) | |
| download | linux-e81bff39489a06384822bb38ce7a59f9e365bbe9.tar.xz linux-e81bff39489a06384822bb38ce7a59f9e365bbe9.zip | |
media: cec: integrate cec_validate_phys_addr() in cec-api.c
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/cec/cec-api.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/media/cec/cec-api.c b/drivers/media/cec/cec-api.c index 19170b1073fa..391b6fd483e1 100644 --- a/drivers/media/cec/cec-api.c +++ b/drivers/media/cec/cec-api.c @@ -101,6 +101,23 @@ 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) { @@ -112,7 +129,7 @@ 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); |