diff options
author | Brian Norris <briannorris@chromium.org> | 2019-06-25 10:40:45 -0700 |
---|---|---|
committer | Kalle Valo <kvalo@codeaurora.org> | 2019-06-27 19:50:58 +0300 |
commit | 8a7f9fd8a3e09c829c9fc2a86fe2d370ebcafd95 (patch) | |
tree | 7cfce9205e8212d1ab509e7c39342c418511e67c /drivers/net/wireless/marvell/mwifiex/11n_aggr.c | |
parent | ce2e942e32e851acdae05f9772f3b7a99f6a47cb (diff) |
mwifiex: don't disable hardirqs; just softirqs
main_proc_lock and int_lock (in mwifiex_adapter) are the only spinlocks
used in hardirq contexts. The rest are only in task or softirq contexts.
Convert every other lock from *_irq{save,restore}() variants to _bh()
variants.
This is a mechanical transformation of all spinlock usage in mwifiex
using the following:
Step 1:
I ran this nasty sed script:
sed -i -E '/spin_lock_irqsave|spin_unlock_irqrestore/ {
/main_proc_lock|int_lock/! {
s:(spin_(un|)lock)_irq(save|restore):\1_bh: ;
# Join broken lines.
:a /;$/! {
N;
s/\s*\n\s*//;
ba
}
/,.*\);$/ s:,.*\):\):
}
}' drivers/net/wireless/marvell/mwifiex/*
Step 2:
Manually delete the flags / ra_list_flags args from:
mwifiex_send_single_packet()
mwifiex_11n_aggregate_pkt()
mwifiex_send_processed_packet()
which are now unused.
Step 3:
Apply this semantic patch (coccinelle) to remove the unused 'flags'
variables:
// <smpl>
@@
type T;
identifier i;
@@
(
extern T i;
|
- T i;
... when != i
)
// </smpl>
(Usage is something like this:
make coccicheck COCCI=./patch.cocci MODE=patch M=drivers/net/wireless/marvell/mwifiex/
although this skips *.h files for some reasons, so I had to massage
stuff.)
Testing: I've played with a variety of stress tests, including download
stress tests on the same APs which caught regressions with commit
5188d5453bc9 ("mwifiex: restructure rx_reorder_tbl_lock usage"). I've
primarily tested on Marvell 8997 / PCIe, although I've given 8897 / SDIO
a quick spin as well.
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/marvell/mwifiex/11n_aggr.c')
-rw-r--r-- | drivers/net/wireless/marvell/mwifiex/11n_aggr.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/11n_aggr.c b/drivers/net/wireless/marvell/mwifiex/11n_aggr.c index 042a1d07f686..088612438530 100644 --- a/drivers/net/wireless/marvell/mwifiex/11n_aggr.c +++ b/drivers/net/wireless/marvell/mwifiex/11n_aggr.c @@ -155,7 +155,7 @@ mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv, int mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv, struct mwifiex_ra_list_tbl *pra_list, - int ptrindex, unsigned long ra_list_flags) + int ptrindex) __releases(&priv->wmm.ra_list_spinlock) { struct mwifiex_adapter *adapter = priv->adapter; @@ -168,8 +168,7 @@ mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv, skb_src = skb_peek(&pra_list->skb_head); if (!skb_src) { - spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, - ra_list_flags); + spin_unlock_bh(&priv->wmm.ra_list_spinlock); return 0; } @@ -177,8 +176,7 @@ mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv, skb_aggr = mwifiex_alloc_dma_align_buf(adapter->tx_buf_size, GFP_ATOMIC); if (!skb_aggr) { - spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, - ra_list_flags); + spin_unlock_bh(&priv->wmm.ra_list_spinlock); return -1; } @@ -208,17 +206,15 @@ mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv, pra_list->total_pkt_count--; atomic_dec(&priv->wmm.tx_pkts_queued); aggr_num++; - spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, - ra_list_flags); + spin_unlock_bh(&priv->wmm.ra_list_spinlock); mwifiex_11n_form_amsdu_pkt(skb_aggr, skb_src, &pad); mwifiex_write_data_complete(adapter, skb_src, 0, 0); - spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); + spin_lock_bh(&priv->wmm.ra_list_spinlock); if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) { - spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, - ra_list_flags); + spin_unlock_bh(&priv->wmm.ra_list_spinlock); return -1; } @@ -232,7 +228,7 @@ mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv, } while (skb_src); - spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags); + spin_unlock_bh(&priv->wmm.ra_list_spinlock); /* Last AMSDU packet does not need padding */ skb_trim(skb_aggr, skb_aggr->len - pad); @@ -265,10 +261,9 @@ mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv, } switch (ret) { case -EBUSY: - spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); + spin_lock_bh(&priv->wmm.ra_list_spinlock); if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) { - spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, - ra_list_flags); + spin_unlock_bh(&priv->wmm.ra_list_spinlock); mwifiex_write_data_complete(adapter, skb_aggr, 1, -1); return -1; } @@ -286,8 +281,7 @@ mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv, atomic_inc(&priv->wmm.tx_pkts_queued); tx_info_aggr->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; - spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, - ra_list_flags); + spin_unlock_bh(&priv->wmm.ra_list_spinlock); mwifiex_dbg(adapter, ERROR, "data: -EBUSY is returned\n"); break; case -1: |