diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c index c8e2e3a42b4b..e4c2e1e448ad 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn.c @@ -1258,7 +1258,15 @@ static void iwl_irq_tasklet(struct iwl_priv *priv) /* Ack/clear/reset pending uCode interrupts. * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, */ - iwl_write32(priv, CSR_INT, priv->inta); + /* There is a hardware bug in the interrupt mask function that some + * interrupts (i.e. CSR_INT_BIT_SCD) can still be generated even if + * they are disabled in the CSR_INT_MASK register. Furthermore the + * ICT interrupt handling mechanism has another bug that might cause + * these unmasked interrupts fail to be detected. We workaround the + * hardware bugs here by ACKing all the possible interrupts so that + * interrupt coalescing can still be achieved. + */ + iwl_write32(priv, CSR_INT, priv->inta | ~priv->inta_mask); inta = priv->inta; |