From: Hans Verkuil hans.verkuil@cisco.com

onetland: cherry-picked from mainline: e81bff39489a

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

diff --git a/drivers/media/cec/cec-api.c b/drivers/media/cec/cec-api.c index 4ba82938fecf..8436775991d6 100644 --- a/drivers/media/cec/cec-api.c +++ b/drivers/media/cec/cec-api.c @@ -112,6 +112,23 @@ 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) { @@ -123,7 +140,7 @@ 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);