From 1d38227371d8db7d58b4f870192dd944f73f4352 Mon Sep 17 00:00:00 2001 From: Franky Lin Date: Thu, 13 Sep 2012 21:11:59 +0200 Subject: brcmfmac: use atomic variable for interrupt pending flag Interrupt pending flag used in SDIO bus layer could be used in multiple processes in different context. Use atomic_t make sure every interrupt is handled. Reviewed-by: Hante Meuleman Reviewed-by: Pieter-Paul Giesberts Reviewed-by: Arend van Spriel Signed-off-by: Franky Lin Signed-off-by: Arend van Spriel Signed-off-by: John W. Linville --- drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c index 2ca9e8c179c7..b0794e856a0a 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c @@ -531,7 +531,7 @@ struct brcmf_sdio { bool intr; /* Use interrupts */ bool poll; /* Use polling */ - bool ipend; /* Device interrupt is pending */ + atomic_t ipend; /* Device interrupt is pending */ uint spurious; /* Count of spurious interrupts */ uint pollrate; /* Ticks between device polls */ uint polltick; /* Tick counter */ @@ -2151,7 +2151,7 @@ static uint brcmf_sdbrcm_sendfromq(struct brcmf_sdio *bus, uint maxframes) if (ret != 0) break; if (intstatus & bus->hostintmask) - bus->ipend = true; + atomic_set(&bus->ipend, 1); } } @@ -2249,7 +2249,7 @@ static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus) unsigned long flags; spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags); - if (!bus->sdiodev->irq_en && !bus->ipend) { + if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) { enable_irq(bus->sdiodev->irq); bus->sdiodev->irq_en = true; } @@ -2332,8 +2332,8 @@ static bool brcmf_sdbrcm_dpc(struct brcmf_sdio *bus) goto clkwait; /* Pending interrupt indicates new device status */ - if (bus->ipend) { - bus->ipend = false; + if (atomic_read(&bus->ipend) > 0) { + atomic_set(&bus->ipend, 0); err = r_sdreg32(bus, &newstatus, offsetof(struct sdpcmd_regs, intstatus)); bus->sdcnt.f1regdata++; @@ -2478,7 +2478,7 @@ clkwait: } else if (bus->clkstate == CLK_PENDING) { brcmf_dbg(INFO, "rescheduled due to CLK_PENDING awaiting I_CHIPACTIVE interrupt\n"); resched = true; - } else if (bus->intstatus || bus->ipend || + } else if (bus->intstatus || atomic_read(&bus->ipend) > 0 || (!bus->fcstate && brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && data_ok(bus)) || PKT_AVAILABLE()) { resched = true; @@ -3692,7 +3692,7 @@ void brcmf_sdbrcm_isr(void *arg) } /* Count the interrupt call */ bus->sdcnt.intrcount++; - bus->ipend = true; + atomic_set(&bus->ipend, 1); /* Disable additional interrupts (is this needed now)? */ if (!bus->intr) @@ -3740,7 +3740,7 @@ static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus) schedule the DPC */ if (intstatus) { bus->sdcnt.pollcnt++; - bus->ipend = true; + atomic_set(&bus->ipend, 1); bus->dpc_sched = true; if (bus->dpc_tsk) { @@ -3784,7 +3784,7 @@ static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus) up(&bus->sdsem); - return bus->ipend; + return (atomic_read(&bus->ipend) > 0); } static bool brcmf_sdbrcm_chipmatch(u16 chipid) -- cgit v1.2.1