cfg80211: fix wdev tracing crash
Arend reported a crash in tracing if the driver returns an ERR_PTR() value from the add_virtual_intf() callback. This is due to the tracing then still attempting to dereference the "pointer", fix this by using IS_ERR_OR_NULL(). Reported-by: Arend van Spriel <arend@broadcom.com> Tested-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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@ -27,7 +27,8 @@
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#define WIPHY_PR_ARG __entry->wiphy_name
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#define WDEV_ENTRY __field(u32, id)
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#define WDEV_ASSIGN (__entry->id) = (wdev ? wdev->identifier : 0)
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#define WDEV_ASSIGN (__entry->id) = (!IS_ERR_OR_NULL(wdev) \
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? wdev->identifier : 0)
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#define WDEV_PR_FMT "wdev(%u)"
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#define WDEV_PR_ARG (__entry->id)
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