linux/net/wireless/ethtool.c
Sergey Matyukevich bfb7bac3a8 cfg80211: check wiphy driver existence for drvinfo report
When preparing ethtool drvinfo, check if wiphy driver is defined
before dereferencing it. Driver may not exist, e.g. if wiphy is
attached to a virtual platform device.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Link: https://lore.kernel.org/r/20200203105644.28875-1-sergey.matyukevich.os@quantenna.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-07 12:53:26 +01:00

30 lines
843 B
C

// SPDX-License-Identifier: GPL-2.0
#include <linux/utsname.h>
#include <net/cfg80211.h>
#include "core.h"
#include "rdev-ops.h"
void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct device *pdev = wiphy_dev(wdev->wiphy);
if (pdev->driver)
strlcpy(info->driver, pdev->driver->name,
sizeof(info->driver));
else
strlcpy(info->driver, "N/A", sizeof(info->driver));
strlcpy(info->version, init_utsname()->release, sizeof(info->version));
if (wdev->wiphy->fw_version[0])
strlcpy(info->fw_version, wdev->wiphy->fw_version,
sizeof(info->fw_version));
else
strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
strlcpy(info->bus_info, dev_name(wiphy_dev(wdev->wiphy)),
sizeof(info->bus_info));
}
EXPORT_SYMBOL(cfg80211_get_drvinfo);