diff options
Diffstat (limited to 'package/kernel/mac80211/patches/347-brcmfmac-Add-necessary-memory-barriers-for-SDIO.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/347-brcmfmac-Add-necessary-memory-barriers-for-SDIO.patch | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/package/kernel/mac80211/patches/347-brcmfmac-Add-necessary-memory-barriers-for-SDIO.patch b/package/kernel/mac80211/patches/347-brcmfmac-Add-necessary-memory-barriers-for-SDIO.patch deleted file mode 100644 index c419cc6..0000000 --- a/package/kernel/mac80211/patches/347-brcmfmac-Add-necessary-memory-barriers-for-SDIO.patch +++ /dev/null @@ -1,171 +0,0 @@ -From: Hante Meuleman <meuleman@broadcom.com> -Date: Wed, 18 Mar 2015 13:25:22 +0100 -Subject: [PATCH] brcmfmac: Add necessary memory barriers for SDIO. - -SDIO uses a thread to handle all communication with the device, -for this data is exchanged between threads. This data needs proper -memory barriers to make sure that data "exchange" is going correct. - -Reviewed-by: Arend Van Spriel <arend@broadcom.com> -Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> -Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> -Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com> -Signed-off-by: Hante Meuleman <meuleman@broadcom.com> -Signed-off-by: Arend van Spriel <arend@broadcom.com> -Signed-off-by: Kalle Valo <kvalo@codeaurora.org> ---- - ---- a/drivers/net/wireless/brcm80211/brcmfmac/sdio.c -+++ b/drivers/net/wireless/brcm80211/brcmfmac/sdio.c -@@ -507,8 +507,8 @@ struct brcmf_sdio { - - struct workqueue_struct *brcmf_wq; - struct work_struct datawork; -- atomic_t dpc_tskcnt; -- atomic_t dpc_running; -+ bool dpc_triggered; -+ bool dpc_running; - - bool txoff; /* Transmit flow-controlled */ - struct brcmf_sdio_count sdcnt; -@@ -2713,6 +2713,7 @@ static void brcmf_sdio_dpc(struct brcmf_ - err = brcmf_sdio_tx_ctrlframe(bus, bus->ctrl_frame_buf, - bus->ctrl_frame_len); - bus->ctrl_frame_err = err; -+ wmb(); - bus->ctrl_frame_stat = false; - } - sdio_release_host(bus->sdiodev->func[1]); -@@ -2734,6 +2735,7 @@ static void brcmf_sdio_dpc(struct brcmf_ - sdio_claim_host(bus->sdiodev->func[1]); - if (bus->ctrl_frame_stat) { - bus->ctrl_frame_err = -ENODEV; -+ wmb(); - bus->ctrl_frame_stat = false; - brcmf_sdio_wait_event_wakeup(bus); - } -@@ -2744,7 +2746,7 @@ static void brcmf_sdio_dpc(struct brcmf_ - (!atomic_read(&bus->fcstate) && - brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && - data_ok(bus))) { -- atomic_inc(&bus->dpc_tskcnt); -+ bus->dpc_triggered = true; - } - } - -@@ -2940,6 +2942,7 @@ brcmf_sdio_bus_txctl(struct device *dev, - /* Send from dpc */ - bus->ctrl_frame_buf = msg; - bus->ctrl_frame_len = msglen; -+ wmb(); - bus->ctrl_frame_stat = true; - - brcmf_sdio_trigger_dpc(bus); -@@ -2958,6 +2961,7 @@ brcmf_sdio_bus_txctl(struct device *dev, - if (!ret) { - brcmf_dbg(SDIO, "ctrl_frame complete, err=%d\n", - bus->ctrl_frame_err); -+ rmb(); - ret = bus->ctrl_frame_err; - } - -@@ -3526,8 +3530,8 @@ done: - - void brcmf_sdio_trigger_dpc(struct brcmf_sdio *bus) - { -- if (atomic_read(&bus->dpc_tskcnt) == 0) { -- atomic_inc(&bus->dpc_tskcnt); -+ if (!bus->dpc_triggered) { -+ bus->dpc_triggered = true; - queue_work(bus->brcmf_wq, &bus->datawork); - } - } -@@ -3558,7 +3562,7 @@ void brcmf_sdio_isr(struct brcmf_sdio *b - if (!bus->intr) - brcmf_err("isr w/o interrupt configured!\n"); - -- atomic_inc(&bus->dpc_tskcnt); -+ bus->dpc_triggered = true; - queue_work(bus->brcmf_wq, &bus->datawork); - } - -@@ -3578,7 +3582,7 @@ static void brcmf_sdio_bus_watchdog(stru - if (!bus->intr || - (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) { - -- if (atomic_read(&bus->dpc_tskcnt) == 0) { -+ if (!bus->dpc_triggered) { - u8 devpend; - - sdio_claim_host(bus->sdiodev->func[1]); -@@ -3596,7 +3600,7 @@ static void brcmf_sdio_bus_watchdog(stru - bus->sdcnt.pollcnt++; - atomic_set(&bus->ipend, 1); - -- atomic_inc(&bus->dpc_tskcnt); -+ bus->dpc_triggered = true; - queue_work(bus->brcmf_wq, &bus->datawork); - } - } -@@ -3623,17 +3627,21 @@ static void brcmf_sdio_bus_watchdog(stru - #endif /* DEBUG */ - - /* On idle timeout clear activity flag and/or turn off clock */ -- if ((atomic_read(&bus->dpc_tskcnt) == 0) && -- (atomic_read(&bus->dpc_running) == 0) && -- (bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) { -- bus->idlecount++; -- if (bus->idlecount > bus->idletime) { -- brcmf_dbg(SDIO, "idle\n"); -- sdio_claim_host(bus->sdiodev->func[1]); -- brcmf_sdio_wd_timer(bus, 0); -+ if (!bus->dpc_triggered) { -+ rmb(); -+ if ((!bus->dpc_running) && (bus->idletime > 0) && -+ (bus->clkstate == CLK_AVAIL)) { -+ bus->idlecount++; -+ if (bus->idlecount > bus->idletime) { -+ brcmf_dbg(SDIO, "idle\n"); -+ sdio_claim_host(bus->sdiodev->func[1]); -+ brcmf_sdio_wd_timer(bus, 0); -+ bus->idlecount = 0; -+ brcmf_sdio_bus_sleep(bus, true, false); -+ sdio_release_host(bus->sdiodev->func[1]); -+ } -+ } else { - bus->idlecount = 0; -- brcmf_sdio_bus_sleep(bus, true, false); -- sdio_release_host(bus->sdiodev->func[1]); - } - } else { - bus->idlecount = 0; -@@ -3645,13 +3653,14 @@ static void brcmf_sdio_dataworker(struct - struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio, - datawork); - -- while (atomic_read(&bus->dpc_tskcnt)) { -- atomic_set(&bus->dpc_running, 1); -- atomic_set(&bus->dpc_tskcnt, 0); -+ bus->dpc_running = true; -+ wmb(); -+ while (ACCESS_ONCE(bus->dpc_triggered)) { -+ bus->dpc_triggered = false; - brcmf_sdio_dpc(bus); - bus->idlecount = 0; -- atomic_set(&bus->dpc_running, 0); - } -+ bus->dpc_running = false; - if (brcmf_sdiod_freezing(bus->sdiodev)) { - brcmf_sdiod_change_state(bus->sdiodev, BRCMF_SDIOD_DOWN); - brcmf_sdiod_try_freeze(bus->sdiodev); -@@ -4144,8 +4153,8 @@ struct brcmf_sdio *brcmf_sdio_probe(stru - bus->watchdog_tsk = NULL; - } - /* Initialize DPC thread */ -- atomic_set(&bus->dpc_tskcnt, 0); -- atomic_set(&bus->dpc_running, 0); -+ bus->dpc_triggered = false; -+ bus->dpc_running = false; - - /* Assign bus interface call back */ - bus->sdiodev->bus_if->dev = bus->sdiodev->dev; 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