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authorRichard Cochran <richardcochran@gmail.com>2019-11-14 10:45:04 -0800
committerDavid S. Miller <davem@davemloft.net>2019-11-15 12:48:32 -0800
commit9289252bd1e6a37f8182f7c48e69927292fe9340 (patch)
tree504466a6bba34c382dd05c52e1511125d52f8b69
parentc019b4be5de0d53fff4aa309322397605f634e27 (diff)
downloadlinux-sh-9289252bd1e6a37f8182f7c48e69927292fe9340.tar.gz
dp83640: Reject requests to enable time stamping on both edges.
This driver enables rising edge or falling edge, but not both, and so this patch validates that the request contains only one of the two edges. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/phy/dp83640.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 3bba2bea3a88..8f241b57fcf6 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -475,6 +475,13 @@ static int ptp_dp83640_enable(struct ptp_clock_info *ptp,
PTP_FALLING_EDGE |
PTP_STRICT_FLAGS))
return -EOPNOTSUPP;
+
+ /* Reject requests to enable time stamping on both edges. */
+ if ((rq->extts.flags & PTP_STRICT_FLAGS) &&
+ (rq->extts.flags & PTP_ENABLE_FEATURE) &&
+ (rq->extts.flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES)
+ return -EOPNOTSUPP;
+
index = rq->extts.index;
if (index >= N_EXT_TS)
return -EINVAL;