[RFT] libertas CS: convert to asynchronous firmware loading

[Daniel Drake]

Signed-off-by: Daniel Drake <dsd at laptop.org>
---
 drivers/net/wireless/libertas/if_cs.c |   92 ++++++++++++++++++---------------
 1 files changed, 51 insertions(+), 41 deletions(-)

Request for testing.

Requires these patches first:

[RFC 1/4] libertas: Firmware loading simplifications
[RFC 2/4] libertas: harden-up exit paths
[RFC 3/4] libertas: add asynchronous firmware loading capability

Compile tested only - I don't have the hardware. 

diff --git a/drivers/net/wireless/libertas/if_cs.c b/drivers/net/wireless/libertas/if_cs.c
index bb3deb3..c211b86 100644
--- a/drivers/net/wireless/libertas/if_cs.c
+++ b/drivers/net/wireless/libertas/if_cs.c
@@ -738,6 +738,52 @@ done:
 	return ret;
 }
 
+static void if_cs_prog_firmware(struct lbs_private *priv, int ret,
+				 const struct firmware *helper,
+				 const struct firmware *mainfw)
+{
+	struct if_cs_card *card = priv->card;
+
+	if (ret) {
+		pr_err("failed to find firmware (%d)\n", ret);
+		return;
+	}
+
+	/* Load the firmware */
+	ret = if_cs_prog_helper(card, helper);
+	if (ret == 0 && (card->model != MODEL_8305))
+		ret = if_cs_prog_real(card, mainfw);
+	if (ret)
+		goto out;
+
+	/* Now actually get the IRQ */
+	ret = request_irq(card->p_dev->irq, if_cs_interrupt,
+		IRQF_SHARED, DRV_NAME, card);
+	if (ret) {
+		pr_err("error in request_irq\n");
+		goto out;
+	}
+
+	/*
+	 * Clear any interrupt cause that happened while sending
+	 * firmware/initializing card
+	 */
+	if_cs_write16(card, IF_CS_CARD_INT_CAUSE, IF_CS_BIT_MASK);
+	if_cs_enable_ints(card);
+
+	/* And finally bring the card up */
+	priv->fw_ready = 1;
+	if (lbs_start_card(priv) != 0) {
+		pr_err("could not activate card\n");
+		free_irq(card->p_dev->irq, card);
+	}
+
+out:
+	if (helper)
+		release_firmware(helper);
+	if (mainfw)
+		release_firmware(mainfw);
+}
 
 
 /********************************************************************/
@@ -809,8 +855,6 @@ static int if_cs_probe(struct pcmcia_device *p_dev)
 	unsigned int prod_id;
 	struct lbs_private *priv;
 	struct if_cs_card *card;
-	const struct firmware *helper = NULL;
-	const struct firmware *mainfw = NULL;
 
 	lbs_deb_enter(LBS_DEB_CS);
 
@@ -890,20 +934,6 @@ static int if_cs_probe(struct pcmcia_device *p_dev)
 		goto out2;
 	}
 
-	ret = lbs_get_firmware(&p_dev->dev, card->model, &fw_table[0],
-				&helper, &mainfw);
-	if (ret) {
-		pr_err("failed to find firmware (%d)\n", ret);
-		goto out2;
-	}
-
-	/* Load the firmware early, before calling into libertas.ko */
-	ret = if_cs_prog_helper(card, helper);
-	if (ret == 0 && (card->model != MODEL_8305))
-		ret = if_cs_prog_real(card, mainfw);
-	if (ret)
-		goto out2;
-
 	/* Make this card known to the libertas driver */
 	priv = lbs_add_card(card, &p_dev->dev);
 	if (!priv) {
@@ -911,37 +941,22 @@ static int if_cs_probe(struct pcmcia_device *p_dev)
 		goto out2;
 	}
 
-	/* Finish setting up fields in lbs_private */
+	/* Set up fields in lbs_private */
 	card->priv = priv;
 	priv->card = card;
 	priv->hw_host_to_card = if_cs_host_to_card;
 	priv->enter_deep_sleep = NULL;
 	priv->exit_deep_sleep = NULL;
 	priv->reset_deep_sleep_wakeup = NULL;
-	priv->fw_ready = 1;
 
-	/* Now actually get the IRQ */
-	ret = request_irq(p_dev->irq, if_cs_interrupt,
-		IRQF_SHARED, DRV_NAME, card);
+	/* Get firmware */
+	ret = lbs_get_firmware_async(priv, &p_dev->dev, card->model, fw_table,
+				     if_cs_prog_firmware);
 	if (ret) {
-		pr_err("error in request_irq\n");
-		goto out3;
-	}
-
-	/*
-	 * Clear any interrupt cause that happened while sending
-	 * firmware/initializing card
-	 */
-	if_cs_write16(card, IF_CS_CARD_INT_CAUSE, IF_CS_BIT_MASK);
-	if_cs_enable_ints(card);
-
-	/* And finally bring the card up */
-	if (lbs_start_card(priv) != 0) {
-		pr_err("could not activate card\n");
+		pr_err("failed to find firmware (%d)\n", ret);
 		goto out3;
 	}
 
-	ret = 0;
 	goto out;
 
 out3:
@@ -951,11 +966,6 @@ out2:
 out1:
 	pcmcia_disable_device(p_dev);
 out:
-	if (helper)
-		release_firmware(helper);
-	if (mainfw)
-		release_firmware(mainfw);
-
 	lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 	return ret;
 }
-- 
1.7.7.6