iwlegacy: do not grab nic access if rfkill
If rfkill is on il_grab_nic_access() fail and we can not write to the
various registers during stop procedure. Write to those registers
unconditionally instead.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlegacy/4965-mac.c b/drivers/net/wireless/iwlegacy/4965-mac.c
index 8930e7a..5ebf761 100644
--- a/drivers/net/wireless/iwlegacy/4965-mac.c
+++ b/drivers/net/wireless/iwlegacy/4965-mac.c
@@ -441,11 +441,15 @@
int
il4965_rxq_stop(struct il_priv *il)
{
+ int ret;
- /* stop Rx DMA */
- il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
- il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG,
- FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
+ _il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
+ ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG,
+ FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
+ FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
+ 1000);
+ if (ret < 0)
+ IL_ERR("Can't stop Rx DMA.\n");
return 0;
}
@@ -2031,31 +2035,10 @@
}
}
-/**
- * il4965_txq_ctx_stop - Stop all Tx DMA channels
- */
void
-il4965_txq_ctx_stop(struct il_priv *il)
+il4965_txq_ctx_unmap(struct il_priv *il)
{
- int ch, txq_id;
- unsigned long flags;
-
- /* Turn off all Tx DMA fifos */
- spin_lock_irqsave(&il->lock, flags);
-
- il4965_txq_set_sched(il, 0);
-
- /* Stop each Tx DMA channel, and wait for it to be idle */
- for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
- il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
- if (il_poll_bit
- (il, FH49_TSSR_TX_STATUS_REG,
- FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch), 1000))
- IL_ERR("Failing on timeout while stopping"
- " DMA channel %d [0x%08x]", ch,
- il_rd(il, FH49_TSSR_TX_STATUS_REG));
- }
- spin_unlock_irqrestore(&il->lock, flags);
+ int txq_id;
if (!il->txq)
return;
@@ -2068,6 +2051,30 @@
il_tx_queue_unmap(il, txq_id);
}
+/**
+ * il4965_txq_ctx_stop - Stop all Tx DMA channels
+ */
+void
+il4965_txq_ctx_stop(struct il_priv *il)
+{
+ int ch, ret;
+
+ _il_wr_prph(il, IL49_SCD_TXFACT, 0);
+
+ /* Stop each Tx DMA channel, and wait for it to be idle */
+ for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
+ _il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
+ ret =
+ _il_poll_bit(il, FH49_TSSR_TX_STATUS_REG,
+ FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
+ FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
+ 1000);
+ if (ret < 0)
+ IL_ERR("Timeout stopping DMA channel %d [0x%08x]",
+ ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG));
+ }
+}
+
/*
* Find first available (lowest unused) Tx Queue, mark it "active".
* Called only when finding queue for aggregation.
@@ -5398,19 +5405,27 @@
test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
+ /*
+ * We disabled and synchronized interrupt, and priv->mutex is taken, so
+ * here is the only thread which will program device registers, but
+ * still have lockdep assertions, so we are taking reg_lock.
+ */
+ spin_lock_irq(&il->reg_lock);
+ /* FIXME: il_grab_nic_access if rfkill is off ? */
+
il4965_txq_ctx_stop(il);
il4965_rxq_stop(il);
-
/* Power-down device's busmaster DMA clocks */
- il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
+ _il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
udelay(5);
-
/* Make sure (redundant) we've released our request to stay awake */
- il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
-
+ _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
/* Stop the device, and put it in low power state */
- il_apm_stop(il);
+ _il_apm_stop(il);
+ spin_unlock_irq(&il->reg_lock);
+
+ il4965_txq_ctx_unmap(il);
exit:
memset(&il->card_alive, 0, sizeof(struct il_alive_resp));