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brcmfmac: streamline SDIO dpc 

Streamline SDIO dpc by removing some unnecessary code path.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Franky Lin 2012-09-13 21:12:01 +02:00 committed by John W. Linville
parent f1e68c2e0a
commit 03d5c360dc
1 changed files with 7 additions and 20 deletions
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27
drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
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@ -2330,15 +2330,11 @@ static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
}
bus->clkstate = CLK_AVAIL;
} else {
goto clkwait;
}
}
/* Make sure backplane clock is on */
brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, true);
if (bus->clkstate == CLK_PENDING)
goto clkwait;
/* Pending interrupt indicates new device status */
if (atomic_read(&bus->ipend) > 0) {
@ -2412,7 +2408,7 @@ static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
intstatus &= ~I_HMB_FRAME_IND;
/* On frame indication, read available frames */
if (PKT_AVAILABLE()) {
if (PKT_AVAILABLE() && bus->clkstate == CLK_AVAIL) {
framecnt = brcmf_sdbrcm_readframes(bus, rxlimit, &rxdone);
if (rxdone || bus->rxskip)
intstatus &= ~I_HMB_FRAME_IND;
@ -2422,22 +2418,21 @@ static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
/* Keep still-pending events for next scheduling */
bus->intstatus = intstatus;
clkwait:
brcmf_sdbrcm_clrintr(bus);
if (data_ok(bus) && bus->ctrl_frame_stat &&
(bus->clkstate == CLK_AVAIL)) {
int ret, i;
int i;
ret = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
err = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
SDIO_FUNC_2, F2SYNC, bus->ctrl_frame_buf,
(u32) bus->ctrl_frame_len);
if (ret < 0) {
if (err < 0) {
/* On failure, abort the command and
terminate the frame */
brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
ret);
err);
bus->sdcnt.tx_sderrs++;
brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
@ -2459,10 +2454,9 @@ clkwait:
break;
}
}
if (ret == 0)
} else {
bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
}
bus->ctrl_frame_stat = false;
brcmf_sdbrcm_wait_event_wakeup(bus);
}
@ -2475,17 +2469,10 @@ clkwait:
txlimit -= framecnt;
}
/* Resched if events or tx frames are pending,
else await next interrupt */
/* On failed register access, all bets are off:
no resched or interrupts */
if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) || (err != 0)) {
brcmf_dbg(ERROR, "failed backplane access over SDIO, halting operation\n");
bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
bus->intstatus = 0;
} else if (bus->clkstate == CLK_PENDING) {
brcmf_dbg(INFO, "rescheduled due to CLK_PENDING awaiting I_CHIPACTIVE interrupt\n");
brcmf_sdbrcm_adddpctsk(bus);
} else if (bus->intstatus || atomic_read(&bus->ipend) > 0 ||
(!bus->fcstate && brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol)
&& data_ok(bus)) || PKT_AVAILABLE()) {