iwlagn: Clarify FH_TX interrupt
Add/clarify comments and debug messages for interrupt used only for uCode load
Signed-off-by: Ben Cahill <ben.m.cahill@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 6daaad1..7751a75 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -1033,11 +1033,12 @@
handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
}
+ /* This "Tx" DMA channel is used only for loading uCode */
if (inta & CSR_INT_BIT_FH_TX) {
- IWL_DEBUG_ISR(priv, "Tx interrupt\n");
+ IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
priv->isr_stats.tx++;
handled |= CSR_INT_BIT_FH_TX;
- /* FH finished to write, send event */
+ /* Wake up uCode load routine, now that load is complete */
priv->ucode_write_complete = 1;
wake_up_interruptible(&priv->wait_command_queue);
}
@@ -1234,12 +1235,13 @@
iwl_leds_background(priv);
}
+ /* This "Tx" DMA channel is used only for loading uCode */
if (inta & CSR_INT_BIT_FH_TX) {
iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
- IWL_DEBUG_ISR(priv, "Tx interrupt\n");
+ IWL_DEBUG_ISR(priv, "uCode load interrupt\n");
priv->isr_stats.tx++;
handled |= CSR_INT_BIT_FH_TX;
- /* FH finished to write, send event */
+ /* Wake up uCode load routine, now that load is complete */
priv->ucode_write_complete = 1;
wake_up_interruptible(&priv->wait_command_queue);
}