From: Daniel Mack <daniel@zonque.org>
To: linux-wireless@vger.kernel.org
Cc: wcn36xx@lists.infradead.org, kvalo@codeaurora.org,
rfried@codeaurora.org, bjorn.andersson@linaro.org,
Daniel Mack <daniel@zonque.org>
Subject: [PATCH] wcn36xx: allocate skbs with GFP_KERNEL during init
Date: Mon, 19 Mar 2018 07:30:02 +0100 [thread overview]
Message-ID: <20180319063002.24665-1-daniel@zonque.org> (raw)
GFP_ATOMIC should only be used when the allocation is done from atomic
context. Introduce a new flag to wcn36xx_dxe_fill_skb() and use GFP_KERNEL
when pre-allocating buffers during init.
This doesn't fix an issue that was observed in the wild, but it reduces
the chance of failed allocations under memory pressure.
Signed-off-by: Daniel Mack <daniel@zonque.org>
---
drivers/net/wireless/ath/wcn36xx/dxe.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
index 5672154948c3..3e180828fbfa 100644
--- a/drivers/net/wireless/ath/wcn36xx/dxe.c
+++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
@@ -275,12 +275,14 @@ static int wcn36xx_dxe_enable_ch_int(struct wcn36xx *wcn, u16 wcn_ch)
return 0;
}
-static int wcn36xx_dxe_fill_skb(struct device *dev, struct wcn36xx_dxe_ctl *ctl)
+static int wcn36xx_dxe_fill_skb(struct device *dev,
+ struct wcn36xx_dxe_ctl *ctl,
+ gfp_t gfp)
{
struct wcn36xx_dxe_desc *dxe = ctl->desc;
struct sk_buff *skb;
- skb = alloc_skb(WCN36XX_PKT_SIZE, GFP_ATOMIC);
+ skb = alloc_skb(WCN36XX_PKT_SIZE, gfp);
if (skb == NULL)
return -ENOMEM;
@@ -307,7 +309,7 @@ static int wcn36xx_dxe_ch_alloc_skb(struct wcn36xx *wcn,
cur_ctl = wcn_ch->head_blk_ctl;
for (i = 0; i < wcn_ch->desc_num; i++) {
- wcn36xx_dxe_fill_skb(wcn->dev, cur_ctl);
+ wcn36xx_dxe_fill_skb(wcn->dev, cur_ctl, GFP_KERNEL);
cur_ctl = cur_ctl->next;
}
@@ -533,7 +535,7 @@ static int wcn36xx_rx_handle_packets(struct wcn36xx *wcn,
while (!(dxe->ctrl & WCN36XX_DXE_CTRL_VALID_MASK)) {
skb = ctl->skb;
dma_addr = dxe->dst_addr_l;
- ret = wcn36xx_dxe_fill_skb(wcn->dev, ctl);
+ ret = wcn36xx_dxe_fill_skb(wcn->dev, ctl, GFP_ATOMIC);
if (0 == ret) {
/* new skb allocation ok. Use the new one and queue
* the old one to network system.
--
2.14.3
next reply other threads:[~2018-03-19 6:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-19 6:30 Daniel Mack [this message]
2018-03-29 18:04 ` [PATCH] wcn36xx: allocate skbs with GFP_KERNEL during init Daniel Mack
2018-04-03 9:58 ` Kalle Valo
2018-04-10 15:00 ` Kalle Valo
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