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cfg80211: dynamically allocate per-tid stats for station info

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With the addition of TXQ stats in the per-tid statistics the struct
station_info grew significantly. This resulted in stack size warnings
due to the structure itself being above the limit for the warnings.

Add an allocation function that those who want to provide per-tid
stats should use to allocate the tid array, i.e.
struct station_info::pertid.

Cc: Toke Høiland-Jørgensen <toke@toke.dk>
Fixes: 52539ca89f ("cfg80211: Expose TXQ stats and parameters to userspace")
Signed-off-by: Arend van Spriel <aspriel@gmail.com>
[johannes: fix missing BIT() and logic by removing]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Arend van Spriel
2018-05-10 13:50:12 +02:00
committed by Johannes Berg
parent 57c6cb8171
commit 8689c051a2
4 changed files with 27 additions and 6 deletions
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11
net/wireless/util.c
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@@ -1787,6 +1787,17 @@ bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
return false;
}
int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp)
{
sinfo->pertid = kcalloc(sizeof(*(sinfo->pertid)),
IEEE80211_NUM_TIDS + 1, gfp);
if (!sinfo->pertid)
return -ENOMEM;
return 0;
}
EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats);
/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
const unsigned char rfc1042_header[] __aligned(2) =