4.19-stable review patch. If anyone has any objections, please let me know.
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From: Hans Verkuil hans.verkuil@cisco.com
commit e81bff39489a06384822bb38ce7a59f9e365bbe9 upstream.
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: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/media/cec/cec-api.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)
--- 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 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 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);