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staging: vt6656: Use vnt_rx_tail struct for tail variables.

Browse source 
Place tsf_time, sq, new_rsr, rssi, rsr and sq3 packed in the structure.

Unused variables are removed along with skb_data and structure is
placed beyond vnt_rx_header + pay_load_with_padding on skb->data.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/6ac6eae0-7b71-fefe-9230-da3b345b634b@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Malcolm Priestley 2020-01-19 12:03:41 +00:00 committed by Greg Kroah-Hartman
parent 8902ecd70b
commit b653174327
2 changed files with 17 additions and 25 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
drivers/staging/vt6656/device.h
View file

@ -213,6 +213,15 @@ struct vnt_rx_header {
u16 pay_load_len;
} __packed;
struct vnt_rx_tail {
__le64 tsf_time;
u8 sq;
u8 new_rsr;
u8 rssi;
u8 rsr;
u8 sq_3;
} __packed;
/* RCB (Receive Control Block) */
struct vnt_rcb {
void *priv;

33
drivers/staging/vt6656/dpc.c
View file

@ -32,13 +32,10 @@ int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb,
struct ieee80211_rx_status *rx_status;
struct ieee80211_hdr *hdr;
struct vnt_rx_header *head;
struct vnt_rx_tail *tail;
__le16 fc;
u8 *rsr, *new_rsr, *rssi;
__le64 *tsf_time;
u32 frame_size;
int ii;
u8 *sq, *sq_3;
u8 *skb_data;
u16 rx_bitrate, pay_load_with_padding;
u8 rate_idx = 0;
long rx_dbm;
@ -62,8 +59,6 @@ int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb,
return false;
}
skb_data = (u8 *)skb->data;
/* real Frame Size = USBframe_size -4WbkStatus - 4RxStatus */
/* -8TSF - 4RSR - 4SQ3 - ?Padding */
@ -96,26 +91,14 @@ int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb,
pay_load_with_padding = ((head->pay_load_len / 4) +
((head->pay_load_len % 4) ? 1 : 0)) * 4;
tsf_time = (__le64 *)(skb_data + 8 + pay_load_with_padding);
tail = (struct vnt_rx_tail *)(skb->data +
sizeof(*head) + pay_load_with_padding);
priv->tsf_time = le64_to_cpu(tail->tsf_time);
priv->tsf_time = le64_to_cpu(*tsf_time);
if (priv->bb_type == BB_TYPE_11G) {
sq_3 = skb_data + 8 + pay_load_with_padding + 12;
sq = sq_3;
} else {
sq = skb_data + 8 + pay_load_with_padding + 8;
sq_3 = sq;
}
new_rsr = skb_data + 8 + pay_load_with_padding + 9;
rssi = skb_data + 8 + pay_load_with_padding + 10;
rsr = skb_data + 8 + pay_load_with_padding + 11;
if (*rsr & (RSR_IVLDTYP | RSR_IVLDLEN))
if (tail->rsr & (RSR_IVLDTYP | RSR_IVLDLEN))
return false;
vnt_rf_rssi_to_dbm(priv, *rssi, &rx_dbm);
vnt_rf_rssi_to_dbm(priv, tail->rssi, &rx_dbm);
priv->bb_pre_ed_rssi = (u8)rx_dbm + 1;
priv->current_rssi = priv->bb_pre_ed_rssi;
@ -129,7 +112,7 @@ int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb,
rx_status->flag = 0;
rx_status->freq = hw->conf.chandef.chan->center_freq;
if (!(*rsr & RSR_CRCOK))
if (!(tail->rsr & RSR_CRCOK))
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
hdr = (struct ieee80211_hdr *)(skb->data);
@ -142,7 +125,7 @@ int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb,
rx_status->flag |= RX_FLAG_DECRYPTED;
/* Drop packet */
if (!(*new_rsr & NEWRSR_DECRYPTOK)) {
if (!(tail->new_rsr & NEWRSR_DECRYPTOK)) {
dev_kfree_skb(skb);
return true;
}