From 7888fe53b7066c284e172d98d98d1865d6a9e5a0 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 16 Mar 2021 17:30:36 -0700 Subject: ethtool: Add common function for filling out strings Add a function to handle the common pattern of printing a string into the ethtool strings interface and incrementing the string pointer by the ETH_GSTRING_LEN. Most of the drivers end up doing this and several have implemented their own versions of this function so it would make sense to consolidate on one implementation. Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller --- net/ethtool/ioctl.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'net') diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index 24783b71c584..0788cc3b3114 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -1844,6 +1844,18 @@ out: return ret; } +__printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + vsnprintf(*data, ETH_GSTRING_LEN, fmt, args); + va_end(args); + + *data += ETH_GSTRING_LEN; +} +EXPORT_SYMBOL(ethtool_sprintf); + static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) { struct ethtool_value id; -- cgit v1.2.3