time-wrs: clear struct hwtstamp_config before SIOCSHWTSTAMP ioctl

This commit is required to uplift a wr-switch kernel version Since the kernel commit 850a545bd net: validate HWTSTAMP ioctl parameters Follows: v3.1-rc9 Precedes: v3.2-rc1 SIOCSHWTSTAMP ioctl check whether field "flags" of struct hwtstamp_config is empty, otherwise ioctl returns -EINVAL Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

time-wrs: clear struct hwtstamp_config before SIOCSHWTSTAMP ioctl
This commit is required to uplift a wr-switch kernel version Since the kernel commit 850a545bd net: validate HWTSTAMP ioctl parameters Follows: v3.1-rc9 Precedes: v3.2-rc1 SIOCSHWTSTAMP ioctl check whether field "flags" of struct hwtstamp_config is empty, otherwise ioctl returns -EINVAL Signed-off-by: Adam Wujek <adam.wujek@cern.ch>
8d12b26d · Adam Wujek · 6f9508cf · 8d12b26d
Commit 8d12b26d authored Nov 03, 2016 by Adam Wujek 💬
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wrs-socket.c time-wrs/wrs-socket.c +6 -0

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--- a/time-wrs/wrs-socket.c
+++ b/time-wrs/wrs-socket.c
@@ -592,6 +592,12 @@ static int wrs_enable_timestamps(struct pp_instance *ppi, int fd)
 	if (fd < 0)
 		return 0; /* nothing to do */

+	/* Since version v3.2-rc1 (commit 850a545bd) linux kernel check whether
+	 * field "flags" of struct hwtstamp_config is empty, otherwise ioctl
+	 * for SIOCSHWTSTAMP returns -EINVAL */
+	memset(&ifr, 0, sizeof(struct ifreq));
+	memset(&hwconfig, 0, sizeof(struct hwtstamp_config));
+
 	strncpy(ifr.ifr_name, ppi->iface_name, sizeof(ifr.ifr_name));
 	hwconfig.tx_type = HWTSTAMP_TX_ON;
 	hwconfig.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;