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wil6210: Rate limit "ring full" error message 

In the wil_tx_ring, error message printed when tx attempted
while vring has no space to accommodate all fragments of frame.
Normally, such situation handled by stopping tx queue.
But, if tx queue is by-passed (like pktgen does), this error
will be triggered at high rate and dmesg will be flooded with
this message. Whole system may become unstable and hang with
no possible recover except power cycle.

Rate-limit it to prevent dmesg flooding.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vladimir Kondratiev 2014-12-01 15:36:03 +02:00 committed by John W. Linville
parent 7cd4ec5517
commit 70801e1b1e
1 changed files with 3 additions and 2 deletions
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5
drivers/net/wireless/ath/wil6210/txrx.c
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@ -928,8 +928,9 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
wil_dbg_txrx(wil, "%s()\n", __func__);
if (avail < 1 + nr_frags) {
wil_err(wil, "Tx ring full. No space for %d fragments\n",
1 + nr_frags);
wil_err_ratelimited(wil,
"Tx ring full. No space for %d fragments\n",
1 + nr_frags);
return -ENOMEM;
}
_d = &vring->va[i].tx;