From 3019de124b9f5b1526cb3668b74af14371e21795 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 6 Jun 2011 16:41:33 -0700 Subject: [PATCH] net: Rework netdev_drivername() to avoid warning. This interface uses a temporary buffer, but for no real reason. And now can generate warnings like: net/sched/sch_generic.c: In function dev_watchdog net/sched/sch_generic.c:254:10: warning: unused variable drivername Just return driver->name directly or "". Reported-by: Connor Hansen Signed-off-by: David S. Miller --- include/linux/netdevice.h | 2 +- net/core/dev.c | 16 +++++----------- net/sched/sch_generic.c | 3 +-- 3 files changed, 7 insertions(+), 14 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index ca333e79e10f..54b8b4d7b68f 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2555,7 +2555,7 @@ extern void netdev_class_remove_file(struct class_attribute *class_attr); extern struct kobj_ns_type_operations net_ns_type_operations; -extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); +extern const char *netdev_drivername(const struct net_device *dev); extern void linkwatch_run_queue(void); diff --git a/net/core/dev.c b/net/core/dev.c index 939307891e71..1af6cb27f67a 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6264,29 +6264,23 @@ err_name: /** * netdev_drivername - network driver for the device * @dev: network device - * @buffer: buffer for resulting name - * @len: size of buffer * * Determine network driver for device. */ -char *netdev_drivername(const struct net_device *dev, char *buffer, int len) +const char *netdev_drivername(const struct net_device *dev) { const struct device_driver *driver; const struct device *parent; - - if (len <= 0 || !buffer) - return buffer; - buffer[0] = 0; + const char *empty = ""; parent = dev->dev.parent; - if (!parent) - return buffer; + return empty; driver = parent->driver; if (driver && driver->name) - strlcpy(buffer, driver->name, len); - return buffer; + return driver->name; + return empty; } static int __netdev_printk(const char *level, const struct net_device *dev, diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c index b1721d71c27c..b4c680900d7a 100644 --- a/net/sched/sch_generic.c +++ b/net/sched/sch_generic.c @@ -251,9 +251,8 @@ static void dev_watchdog(unsigned long arg) } if (some_queue_timedout) { - char drivername[64]; WARN_ONCE(1, KERN_INFO "NETDEV WATCHDOG: %s (%s): transmit queue %u timed out\n", - dev->name, netdev_drivername(dev, drivername, 64), i); + dev->name, netdev_drivername(dev), i); dev->netdev_ops->ndo_tx_timeout(dev); } if (!mod_timer(&dev->watchdog_timer, -- 2.20.1