diff options
Diffstat (limited to 'drivers/media/cec/cec-api.c')
| -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 a079f7fe018c..21a5f45e0259 100644 --- a/drivers/media/cec/cec-api.c +++ b/drivers/media/cec/cec-api.c @@ -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); |