forked from Minki/linux
p54: refactor p54_alloc_skb
Old firmwares had no problems processing frames which filled eighth of the memory window. However we have to be a bit more careful with fat frames when we talk to new firmwares. Apart from that, I confess the old logic was a bit weird and not very sophisticated. Signed-off-by: Christian Lamparter <chunkeey@web.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
parent
6dd1bf3118
commit
63f2dc9f2f
@ -44,6 +44,8 @@ enum p54_control_frame_types {
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P54_CONTROL_TYPE_BT_OPTIONS = 35
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};
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#define P54_MAX_CTRL_FRAME_LEN 0x1000
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#define P54_HDR_FLAG_CONTROL BIT(15)
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#define P54_HDR_FLAG_CONTROL_OPSET (BIT(15) + BIT(0))
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@ -1104,25 +1104,29 @@ static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
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return 0;
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}
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static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev,
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u16 hdr_flags, u16 len, u16 type, gfp_t memflags)
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static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev, u16 hdr_flags,
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u16 payload_len, u16 type, gfp_t memflags)
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{
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struct p54_common *priv = dev->priv;
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struct p54_hdr *hdr;
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struct sk_buff *skb;
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size_t frame_len = sizeof(*hdr) + payload_len;
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skb = __dev_alloc_skb(len + priv->tx_hdr_len, memflags);
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if (frame_len > P54_MAX_CTRL_FRAME_LEN)
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return NULL;
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skb = __dev_alloc_skb(priv->tx_hdr_len + frame_len, memflags);
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if (!skb)
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return NULL;
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skb_reserve(skb, priv->tx_hdr_len);
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hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
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hdr->flags = cpu_to_le16(hdr_flags);
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hdr->len = cpu_to_le16(len - sizeof(*hdr));
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hdr->len = cpu_to_le16(payload_len);
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hdr->type = cpu_to_le16(type);
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hdr->tries = hdr->rts_tries = 0;
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if (unlikely(p54_assign_address(dev, skb, hdr, len))) {
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if (p54_assign_address(dev, skb, hdr, frame_len)) {
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kfree_skb(skb);
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return NULL;
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}
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@ -1132,7 +1136,6 @@ static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev,
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int p54_read_eeprom(struct ieee80211_hw *dev)
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{
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struct p54_common *priv = dev->priv;
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struct p54_hdr *hdr = NULL;
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struct p54_eeprom_lm86 *eeprom_hdr;
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struct sk_buff *skb;
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size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
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@ -1145,9 +1148,9 @@ int p54_read_eeprom(struct ieee80211_hw *dev)
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else
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maxblocksize -= 0x4;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(*hdr) +
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sizeof(*eeprom_hdr) + maxblocksize,
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P54_CONTROL_TYPE_EEPROM_READBACK, GFP_KERNEL);
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(*eeprom_hdr) +
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maxblocksize, P54_CONTROL_TYPE_EEPROM_READBACK,
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GFP_KERNEL);
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if (!skb)
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goto free;
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priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
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@ -1203,8 +1206,7 @@ static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
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struct sk_buff *skb;
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struct p54_tim *tim;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
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sizeof(struct p54_hdr) + sizeof(*tim),
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*tim),
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P54_CONTROL_TYPE_TIM, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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@ -1222,8 +1224,7 @@ static int p54_sta_unlock(struct ieee80211_hw *dev, u8 *addr)
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struct sk_buff *skb;
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struct p54_sta_unlock *sta;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
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sizeof(struct p54_hdr) + sizeof(*sta),
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*sta),
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P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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@ -1264,8 +1265,7 @@ static int p54_tx_cancel(struct ieee80211_hw *dev, struct sk_buff *entry)
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struct p54_hdr *hdr;
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struct p54_txcancel *cancel;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
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sizeof(struct p54_hdr) + sizeof(*cancel),
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*cancel),
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P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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@ -1548,9 +1548,8 @@ static int p54_setup_mac(struct ieee80211_hw *dev)
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struct p54_setup_mac *setup;
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u16 mode;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup) +
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sizeof(struct p54_hdr), P54_CONTROL_TYPE_SETUP,
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GFP_ATOMIC);
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup),
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P54_CONTROL_TYPE_SETUP, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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@ -1628,9 +1627,8 @@ static int p54_scan(struct ieee80211_hw *dev, u16 mode, u16 dwell)
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__le16 freq = cpu_to_le16(dev->conf.channel->center_freq);
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int band = dev->conf.channel->band;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) +
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sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN,
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GFP_ATOMIC);
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan),
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P54_CONTROL_TYPE_SCAN, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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@ -1710,9 +1708,8 @@ static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
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struct sk_buff *skb;
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struct p54_led *led;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led) +
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sizeof(struct p54_hdr), P54_CONTROL_TYPE_LED,
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GFP_ATOMIC);
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led),
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P54_CONTROL_TYPE_LED, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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@ -1739,9 +1736,8 @@ static int p54_set_edcf(struct ieee80211_hw *dev)
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struct sk_buff *skb;
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struct p54_edcf *edcf;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf) +
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sizeof(struct p54_hdr), P54_CONTROL_TYPE_DCFINIT,
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GFP_ATOMIC);
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf),
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P54_CONTROL_TYPE_DCFINIT, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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@ -1778,9 +1774,8 @@ static int p54_set_ps(struct ieee80211_hw *dev)
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else
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mode = P54_PSM_CAM;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*psm) +
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sizeof(struct p54_hdr), P54_CONTROL_TYPE_PSM,
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GFP_ATOMIC);
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*psm),
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P54_CONTROL_TYPE_PSM, GFP_ATOMIC);
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if (!skb)
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return -ENOMEM;
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@ -2083,10 +2078,8 @@ static int p54_init_xbow_synth(struct ieee80211_hw *dev)
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struct sk_buff *skb;
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struct p54_xbow_synth *xbow;
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow) +
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sizeof(struct p54_hdr),
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P54_CONTROL_TYPE_XBOW_SYNTH_CFG,
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GFP_KERNEL);
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow),
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P54_CONTROL_TYPE_XBOW_SYNTH_CFG, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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@ -2115,7 +2108,7 @@ static void p54_work(struct work_struct *work)
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* 2. cancel stuck frames / reset the device if necessary.
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*/
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(struct p54_hdr) +
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL,
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sizeof(struct p54_statistics),
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P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
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if (!skb)
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@ -2226,9 +2219,8 @@ static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
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}
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mutex_lock(&priv->conf_mutex);
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey) +
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sizeof(struct p54_hdr), P54_CONTROL_TYPE_RX_KEYCACHE,
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GFP_ATOMIC);
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skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey),
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P54_CONTROL_TYPE_RX_KEYCACHE, GFP_ATOMIC);
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if (!skb) {
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mutex_unlock(&priv->conf_mutex);
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return -ENOMEM;
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