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path: root/drivers/net/wireless/b43/pio.c
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Diffstat (limited to 'drivers/net/wireless/b43/pio.c')
-rw-r--r--drivers/net/wireless/b43/pio.c79
1 files changed, 47 insertions, 32 deletions
diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
index 9b9044400218..c5cd3bc861be 100644
--- a/drivers/net/wireless/b43/pio.c
+++ b/drivers/net/wireless/b43/pio.c
@@ -342,12 +342,15 @@ static u16 tx_write_2byte_queue(struct b43_pio_txqueue *q,
q->mmio_base + B43_PIO_TXDATA,
sizeof(u16));
if (data_len & 1) {
+ u8 *tail = wl->pio_tailspace;
+ BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 2);
+
/* Write the last byte. */
ctl &= ~B43_PIO_TXCTL_WRITEHI;
b43_piotx_write16(q, B43_PIO_TXCTL, ctl);
- wl->tx_tail[0] = data[data_len - 1];
- wl->tx_tail[1] = 0;
- ssb_block_write(dev->dev, wl->tx_tail, 2,
+ tail[0] = data[data_len - 1];
+ tail[1] = 0;
+ ssb_block_write(dev->dev, tail, 2,
q->mmio_base + B43_PIO_TXDATA,
sizeof(u16));
}
@@ -393,31 +396,31 @@ static u32 tx_write_4byte_queue(struct b43_pio_txqueue *q,
q->mmio_base + B43_PIO8_TXDATA,
sizeof(u32));
if (data_len & 3) {
- wl->tx_tail[3] = 0;
+ u8 *tail = wl->pio_tailspace;
+ BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 4);
+
+ memset(tail, 0, 4);
/* Write the last few bytes. */
ctl &= ~(B43_PIO8_TXCTL_8_15 | B43_PIO8_TXCTL_16_23 |
B43_PIO8_TXCTL_24_31);
switch (data_len & 3) {
case 3:
ctl |= B43_PIO8_TXCTL_16_23 | B43_PIO8_TXCTL_8_15;
- wl->tx_tail[0] = data[data_len - 3];
- wl->tx_tail[1] = data[data_len - 2];
- wl->tx_tail[2] = data[data_len - 1];
+ tail[0] = data[data_len - 3];
+ tail[1] = data[data_len - 2];
+ tail[2] = data[data_len - 1];
break;
case 2:
ctl |= B43_PIO8_TXCTL_8_15;
- wl->tx_tail[0] = data[data_len - 2];
- wl->tx_tail[1] = data[data_len - 1];
- wl->tx_tail[2] = 0;
+ tail[0] = data[data_len - 2];
+ tail[1] = data[data_len - 1];
break;
case 1:
- wl->tx_tail[0] = data[data_len - 1];
- wl->tx_tail[1] = 0;
- wl->tx_tail[2] = 0;
+ tail[0] = data[data_len - 1];
break;
}
b43_piotx_write32(q, B43_PIO8_TXCTL, ctl);
- ssb_block_write(dev->dev, wl->tx_tail, 4,
+ ssb_block_write(dev->dev, tail, 4,
q->mmio_base + B43_PIO8_TXDATA,
sizeof(u32));
}
@@ -456,6 +459,7 @@ static int pio_tx_frame(struct b43_pio_txqueue *q,
int err;
unsigned int hdrlen;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct b43_txhdr *txhdr = (struct b43_txhdr *)wl->pio_scratchspace;
B43_WARN_ON(list_empty(&q->packets_list));
pack = list_entry(q->packets_list.next,
@@ -463,7 +467,9 @@ static int pio_tx_frame(struct b43_pio_txqueue *q,
cookie = generate_cookie(q, pack);
hdrlen = b43_txhdr_size(dev);
- err = b43_generate_txhdr(dev, (u8 *)&wl->txhdr, skb,
+ BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(struct b43_txhdr));
+ B43_WARN_ON(sizeof(wl->pio_scratchspace) < hdrlen);
+ err = b43_generate_txhdr(dev, (u8 *)txhdr, skb,
info, cookie);
if (err)
return err;
@@ -477,9 +483,9 @@ static int pio_tx_frame(struct b43_pio_txqueue *q,
pack->skb = skb;
if (q->rev >= 8)
- pio_tx_frame_4byte_queue(pack, (const u8 *)&wl->txhdr, hdrlen);
+ pio_tx_frame_4byte_queue(pack, (const u8 *)txhdr, hdrlen);
else
- pio_tx_frame_2byte_queue(pack, (const u8 *)&wl->txhdr, hdrlen);
+ pio_tx_frame_2byte_queue(pack, (const u8 *)txhdr, hdrlen);
/* Remove it from the list of available packet slots.
* It will be put back when we receive the status report. */
@@ -625,8 +631,11 @@ static bool pio_rx_frame(struct b43_pio_rxqueue *q)
unsigned int i, padding;
struct sk_buff *skb;
const char *err_msg = NULL;
+ struct b43_rxhdr_fw4 *rxhdr =
+ (struct b43_rxhdr_fw4 *)wl->pio_scratchspace;
- memset(&wl->rxhdr, 0, sizeof(wl->rxhdr));
+ BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(*rxhdr));
+ memset(rxhdr, 0, sizeof(*rxhdr));
/* Check if we have data and wait for it to get ready. */
if (q->rev >= 8) {
@@ -664,16 +673,16 @@ data_ready:
/* Get the preamble (RX header) */
if (q->rev >= 8) {
- ssb_block_read(dev->dev, &wl->rxhdr, sizeof(wl->rxhdr),
+ ssb_block_read(dev->dev, rxhdr, sizeof(*rxhdr),
q->mmio_base + B43_PIO8_RXDATA,
sizeof(u32));
} else {
- ssb_block_read(dev->dev, &wl->rxhdr, sizeof(wl->rxhdr),
+ ssb_block_read(dev->dev, rxhdr, sizeof(*rxhdr),
q->mmio_base + B43_PIO_RXDATA,
sizeof(u16));
}
/* Sanity checks. */
- len = le16_to_cpu(wl->rxhdr.frame_len);
+ len = le16_to_cpu(rxhdr->frame_len);
if (unlikely(len > 0x700)) {
err_msg = "len > 0x700";
goto rx_error;
@@ -683,7 +692,7 @@ data_ready:
goto rx_error;
}
- macstat = le32_to_cpu(wl->rxhdr.mac_status);
+ macstat = le32_to_cpu(rxhdr->mac_status);
if (macstat & B43_RX_MAC_FCSERR) {
if (!(q->dev->wl->filter_flags & FIF_FCSFAIL)) {
/* Drop frames with failed FCS. */
@@ -708,22 +717,25 @@ data_ready:
q->mmio_base + B43_PIO8_RXDATA,
sizeof(u32));
if (len & 3) {
+ u8 *tail = wl->pio_tailspace;
+ BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 4);
+
/* Read the last few bytes. */
- ssb_block_read(dev->dev, wl->rx_tail, 4,
+ ssb_block_read(dev->dev, tail, 4,
q->mmio_base + B43_PIO8_RXDATA,
sizeof(u32));
switch (len & 3) {
case 3:
- skb->data[len + padding - 3] = wl->rx_tail[0];
- skb->data[len + padding - 2] = wl->rx_tail[1];
- skb->data[len + padding - 1] = wl->rx_tail[2];
+ skb->data[len + padding - 3] = tail[0];
+ skb->data[len + padding - 2] = tail[1];
+ skb->data[len + padding - 1] = tail[2];
break;
case 2:
- skb->data[len + padding - 2] = wl->rx_tail[0];
- skb->data[len + padding - 1] = wl->rx_tail[1];
+ skb->data[len + padding - 2] = tail[0];
+ skb->data[len + padding - 1] = tail[1];
break;
case 1:
- skb->data[len + padding - 1] = wl->rx_tail[0];
+ skb->data[len + padding - 1] = tail[0];
break;
}
}
@@ -732,15 +744,18 @@ data_ready:
q->mmio_base + B43_PIO_RXDATA,
sizeof(u16));
if (len & 1) {
+ u8 *tail = wl->pio_tailspace;
+ BUILD_BUG_ON(sizeof(wl->pio_tailspace) < 2);
+
/* Read the last byte. */
- ssb_block_read(dev->dev, wl->rx_tail, 2,
+ ssb_block_read(dev->dev, tail, 2,
q->mmio_base + B43_PIO_RXDATA,
sizeof(u16));
- skb->data[len + padding - 1] = wl->rx_tail[0];
+ skb->data[len + padding - 1] = tail[0];
}
}
- b43_rx(q->dev, skb, &wl->rxhdr);
+ b43_rx(q->dev, skb, rxhdr);
return 1;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-11 20:39:50 +0000