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brcm80211: fmac: remove alignment check from brcmf_sdioh_request_buffer() 

The check for alignment is not valid anymore and can be removed. The
function is collapsed with brcmf_sdioh_request_packet() as a consequence
because it did not add much functionality any longer.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Alwin Beukers <alwin@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Arend van Spriel 2011-11-22 17:21:44 -08:00 committed by John W. Linville
parent be667669ec
commit 8054321b7c
1 changed files with 18 additions and 82 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c
View File

@ -229,44 +229,6 @@ brcmf_sdioh_request_data(struct brcmf_sdio_dev *sdiodev, uint write, bool fifo,
return err_ret;
}
static int
brcmf_sdioh_request_packet(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
uint write, uint func, uint addr,
struct sk_buff *pkt)
{
bool fifo = (fix_inc == SDIOH_DATA_FIX);
int err_ret = 0;
uint pkt_len = pkt->len;
brcmf_dbg(TRACE, "Enter\n");
brcmf_pm_resume_wait(sdiodev, &sdiodev->request_packet_wait);
if (brcmf_pm_resume_error(sdiodev))
return -EIO;
/* Claim host controller */
sdio_claim_host(sdiodev->func[func]);
pkt_len += 3;
pkt_len &= 0xFFFFFFFC;
err_ret = brcmf_sdioh_request_data(sdiodev, write, fifo, func,
addr, pkt, pkt_len);
if (err_ret) {
brcmf_dbg(ERROR, "%s FAILED %p, addr=0x%05x, pkt_len=%d, ERR=0x%08x\n",
write ? "TX" : "RX", pkt, addr, pkt_len, err_ret);
} else {
brcmf_dbg(TRACE, "%s xfr'd %p, addr=0x%05x, len=%d\n",
write ? "TX" : "RX", pkt, addr, pkt_len);
}
/* Release host controller */
sdio_release_host(sdiodev->func[func]);
brcmf_dbg(TRACE, "Exit\n");
return err_ret;
}
int
brcmf_sdioh_request_chain(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
uint write, uint func, uint addr,
@ -317,26 +279,15 @@ brcmf_sdioh_request_chain(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
}
/*
* This function takes a buffer or packet, and fixes everything up
* so that in the end, a DMA-able packet is created.
*
* A buffer does not have an associated packet pointer,
* and may or may not be aligned.
* A packet may consist of a single packet, or a packet chain.
* If it is a packet chain, then all the packets in the chain
* must be properly aligned.
*
* If the packet data is not aligned, then there may only be
* one packet, and in this case, it is copied to a new
* aligned packet.
*
* This function takes a single DMA-able packet.
*/
int brcmf_sdioh_request_buffer(struct brcmf_sdio_dev *sdiodev,
uint fix_inc, uint write, uint func, uint addr,
struct sk_buff *pkt)
{
int status;
struct sk_buff *mypkt = NULL;
uint pkt_len = pkt->len;
bool fifo = (fix_inc == SDIOH_DATA_FIX);
brcmf_dbg(TRACE, "Enter\n");
@ -347,40 +298,25 @@ int brcmf_sdioh_request_buffer(struct brcmf_sdio_dev *sdiodev,
if (brcmf_pm_resume_error(sdiodev))
return -EIO;
if (((ulong) (pkt->data) & DMA_ALIGN_MASK) != 0) {
/*
* Case 2: We have a packet, but it is unaligned.
* In this case, we cannot have a chain (pkt->next == NULL)
*/
brcmf_dbg(DATA, "Creating aligned %s Packet, len=%d\n",
write ? "TX" : "RX", pkt->len);
mypkt = brcmu_pkt_buf_get_skb(pkt->len);
if (!mypkt) {
brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: len %d\n",
pkt->len);
return -EIO;
}
/* Claim host controller */
sdio_claim_host(sdiodev->func[func]);
/* For a write, copy the buffer data into the packet. */
if (write)
memcpy(mypkt->data, pkt->data, pkt->len);
pkt_len += 3;
pkt_len &= (uint)~3;
status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
func, addr, mypkt);
/* For a read, copy the packet data back to the buffer. */
if (!write)
memcpy(pkt->data, mypkt->data, mypkt->len);
brcmu_pkt_buf_free_skb(mypkt);
} else { /* case 3: We have a packet and
it is aligned. */
brcmf_dbg(DATA, "Aligned %s Packet, direct DMA\n",
write ? "Tx" : "Rx");
status = brcmf_sdioh_request_packet(sdiodev, fix_inc, write,
func, addr, pkt);
status = brcmf_sdioh_request_data(sdiodev, write, fifo, func,
addr, pkt, pkt_len);
if (status) {
brcmf_dbg(ERROR, "%s FAILED %p, addr=0x%05x, pkt_len=%d, ERR=0x%08x\n",
write ? "TX" : "RX", pkt, addr, pkt_len, status);
} else {
brcmf_dbg(TRACE, "%s xfr'd %p, addr=0x%05x, len=%d\n",
write ? "TX" : "RX", pkt, addr, pkt_len);
}
/* Release host controller */
sdio_release_host(sdiodev->func[func]);
return status;
}