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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 <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 21:11:59 +02:00 committed by John W. Linville
parent 86761fcbea
commit 1d38227371
1 changed files with 9 additions and 9 deletions
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18
drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
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@ -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)