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authorLarry Finger <Larry.Finger@lwfinger.net>2012-03-08 22:27:46 -0600
committerJohn W. Linville <linville@tuxdriver.com>2012-03-13 14:54:16 -0400
commit6b6fa5868eec26bdc6a83543cebb8cf832a2645a (patch)
tree71f845d127ec1ff121b8a336ead86c6a6ac1c1bb /drivers/net/wireless
parenta3ea2c76b193be5794e0de6aff66e14c21b904f8 (diff)
b43: Load firmware from a work queue and not from the probe routine
Recent changes in udev are causing problems for drivers that load firmware from the probe routine. As b43 has such a structure, it must be changed. As this driver loads more than 1 firmware file, changing to the asynchronous routine request_firmware_nowait() would be complicated. In this implementation, the probe routine starts a queue that calls the firmware loading routines. Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless')
-rw-r--r--drivers/net/wireless/b43/b43.h3
-rw-r--r--drivers/net/wireless/b43/main.c59
2 files changed, 35 insertions, 27 deletions
diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h
index 835462dc120..67c13af6f20 100644
--- a/drivers/net/wireless/b43/b43.h
+++ b/drivers/net/wireless/b43/b43.h
@@ -932,6 +932,9 @@ struct b43_wl {
/* Flag that implement the queues stopping. */
bool tx_queue_stopped[B43_QOS_QUEUE_NUM];
+ /* firmware loading work */
+ struct work_struct firmware_load;
+
/* The device LEDs. */
struct b43_leds leds;
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 1d633f3b327..c79e6638c88 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -2390,8 +2390,14 @@ error:
return err;
}
-static int b43_request_firmware(struct b43_wldev *dev)
+static int b43_one_core_attach(struct b43_bus_dev *dev, struct b43_wl *wl);
+static void b43_one_core_detach(struct b43_bus_dev *dev);
+
+static void b43_request_firmware(struct work_struct *work)
{
+ struct b43_wl *wl = container_of(work,
+ struct b43_wl, firmware_load);
+ struct b43_wldev *dev = wl->current_dev;
struct b43_request_fw_context *ctx;
unsigned int i;
int err;
@@ -2399,23 +2405,23 @@ static int b43_request_firmware(struct b43_wldev *dev)
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
- return -ENOMEM;
+ return;
ctx->dev = dev;
ctx->req_type = B43_FWTYPE_PROPRIETARY;
err = b43_try_request_fw(ctx);
if (!err)
- goto out; /* Successfully loaded it. */
- err = ctx->fatal_failure;
- if (err)
+ goto start_ieee80211; /* Successfully loaded it. */
+ /* Was fw version known? */
+ if (ctx->fatal_failure)
goto out;
+ /* proprietary fw not found, try open source */
ctx->req_type = B43_FWTYPE_OPENSOURCE;
err = b43_try_request_fw(ctx);
if (!err)
- goto out; /* Successfully loaded it. */
- err = ctx->fatal_failure;
- if (err)
+ goto start_ieee80211; /* Successfully loaded it. */
+ if(ctx->fatal_failure)
goto out;
/* Could not find a usable firmware. Print the errors. */
@@ -2425,11 +2431,20 @@ static int b43_request_firmware(struct b43_wldev *dev)
b43err(dev->wl, errmsg);
}
b43_print_fw_helptext(dev->wl, 1);
- err = -ENOENT;
+ goto out;
+
+start_ieee80211:
+ err = ieee80211_register_hw(wl->hw);
+ if (err)
+ goto err_one_core_detach;
+ b43_leds_register(wl->current_dev);
+ goto out;
+
+err_one_core_detach:
+ b43_one_core_detach(dev->dev);
out:
kfree(ctx);
- return err;
}
static int b43_upload_microcode(struct b43_wldev *dev)
@@ -3023,9 +3038,6 @@ static int b43_chip_init(struct b43_wldev *dev)
macctl |= B43_MACCTL_INFRA;
b43_write32(dev, B43_MMIO_MACCTL, macctl);
- err = b43_request_firmware(dev);
- if (err)
- goto out;
err = b43_upload_microcode(dev);
if (err)
goto out; /* firmware is released later */
@@ -4155,6 +4167,7 @@ redo:
mutex_unlock(&wl->mutex);
cancel_delayed_work_sync(&dev->periodic_work);
cancel_work_sync(&wl->tx_work);
+ cancel_work_sync(&wl->firmware_load);
mutex_lock(&wl->mutex);
dev = wl->current_dev;
if (!dev || b43_status(dev) < B43_STAT_STARTED) {
@@ -5314,16 +5327,13 @@ static int b43_bcma_probe(struct bcma_device *core)
if (err)
goto bcma_err_wireless_exit;
- err = ieee80211_register_hw(wl->hw);
- if (err)
- goto bcma_err_one_core_detach;
- b43_leds_register(wl->current_dev);
+ /* setup and start work to load firmware */
+ INIT_WORK(&wl->firmware_load, b43_request_firmware);
+ schedule_work(&wl->firmware_load);
bcma_out:
return err;
-bcma_err_one_core_detach:
- b43_one_core_detach(dev);
bcma_err_wireless_exit:
ieee80211_free_hw(wl->hw);
return err;
@@ -5390,18 +5400,13 @@ int b43_ssb_probe(struct ssb_device *sdev, const struct ssb_device_id *id)
if (err)
goto err_wireless_exit;
- if (first) {
- err = ieee80211_register_hw(wl->hw);
- if (err)
- goto err_one_core_detach;
- b43_leds_register(wl->current_dev);
- }
+ /* setup and start work to load firmware */
+ INIT_WORK(&wl->firmware_load, b43_request_firmware);
+ schedule_work(&wl->firmware_load);
out:
return err;
- err_one_core_detach:
- b43_one_core_detach(dev);
err_wireless_exit:
if (first)
b43_wireless_exit(dev, wl);