From: Indan Zupancic Date: Sat, 8 Jan 2011 11:17:27 +0000 (+0100) Subject: ipw2200: Check for -1 INTA in tasklet too. X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3c4a8cc46e8cc17910020964689f3faf6bffb8ad;p=mv-sheeva.git ipw2200: Check for -1 INTA in tasklet too. This is an attempt to fix a long standing open bug: http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=1334 The interrupt handler checks for INTA being -1, apparently that means that the hardware is gone. But the interrupt handler defers actual interrupt processing to a tasklet. By the time the tasklet is run and checks INTA again, the hardware might be gone and INTA be -1, which confuses the driver because all event bits are set. The patch applies to 2.6.37. Signed-off-by: Indan Zupancic Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/ipw2x00/ipw2200.c b/drivers/net/wireless/ipw2x00/ipw2200.c index 8d6ed5f6f46..ae438ed80c2 100644 --- a/drivers/net/wireless/ipw2x00/ipw2200.c +++ b/drivers/net/wireless/ipw2x00/ipw2200.c @@ -1973,6 +1973,13 @@ static void ipw_irq_tasklet(struct ipw_priv *priv) inta = ipw_read32(priv, IPW_INTA_RW); inta_mask = ipw_read32(priv, IPW_INTA_MASK_R); + + if (inta == 0xFFFFFFFF) { + /* Hardware disappeared */ + IPW_WARNING("TASKLET INTA == 0xFFFFFFFF\n"); + /* Only handle the cached INTA values */ + inta = 0; + } inta &= (IPW_INTA_MASK_ALL & inta_mask); /* Add any cached INTA values that need to be handled */