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[PATCH] bcm43xx: Drain TX status before starting IRQs

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Drain the Microcode TX-status-FIFO before we enable IRQs.
This is required, because the FIFO may still have entries left
from a previous run. Those would immediately fire after enabling
IRQs and would lead to an oops in the DMA TXstatus handling code.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch 2006-11-06 09:45:31 -06:00 committed by John W. Linville
parent edd106fc8a
commit ecac598bcd
1 changed files with 18 additions and 0 deletions
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18
drivers/net/wireless/bcm43xx/bcm43xx_main.c
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@ -1463,6 +1463,23 @@ static void handle_irq_transmit_status(struct bcm43xx_private *bcm)
} }
} }
static void drain_txstatus_queue(struct bcm43xx_private *bcm)
{
u32 dummy;
if (bcm->current_core->rev < 5)
return;
/* Read all entries from the microcode TXstatus FIFO
* and throw them away.
*/
while (1) {
dummy = bcm43xx_read32(bcm, BCM43xx_MMIO_XMITSTAT_0);
if (!dummy)
break;
dummy = bcm43xx_read32(bcm, BCM43xx_MMIO_XMITSTAT_1);
}
}
static void bcm43xx_generate_noise_sample(struct bcm43xx_private *bcm) static void bcm43xx_generate_noise_sample(struct bcm43xx_private *bcm)
{ {
bcm43xx_shm_write16(bcm, BCM43xx_SHM_SHARED, 0x408, 0x7F7F); bcm43xx_shm_write16(bcm, BCM43xx_SHM_SHARED, 0x408, 0x7F7F);
@ -3532,6 +3549,7 @@ int bcm43xx_select_wireless_core(struct bcm43xx_private *bcm,
bcm43xx_macfilter_clear(bcm, BCM43xx_MACFILTER_ASSOC); bcm43xx_macfilter_clear(bcm, BCM43xx_MACFILTER_ASSOC);
bcm43xx_macfilter_set(bcm, BCM43xx_MACFILTER_SELF, (u8 *)(bcm->net_dev->dev_addr)); bcm43xx_macfilter_set(bcm, BCM43xx_MACFILTER_SELF, (u8 *)(bcm->net_dev->dev_addr));
bcm43xx_security_init(bcm); bcm43xx_security_init(bcm);
drain_txstatus_queue(bcm);
ieee80211softmac_start(bcm->net_dev); ieee80211softmac_start(bcm->net_dev);
/* Let's go! Be careful after enabling the IRQs. /* Let's go! Be careful after enabling the IRQs.