diff options
| author | Indan Zupancic <indan@nul.nu> | 2011-01-08 12:17:27 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-01-10 15:40:53 -0500 |
| commit | 3c4a8cc46e8cc17910020964689f3faf6bffb8ad (patch) | |
| tree | 29751a4eb0f9e1a41d914b9154ddac8daecd1452 | |
| parent | ed70c6e60ee51b0fb46752ab4fd372a071da59d8 (diff) | |
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 <indan@nul.nu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/ipw2x00/ipw2200.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/wireless/ipw2x00/ipw2200.c b/drivers/net/wireless/ipw2x00/ipw2200.c index 8d6ed5f6f46f..ae438ed80c2f 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 */ |