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b43legacy: Load firmware from work queue instead of from probe routine

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Recent changes in udev are causing problems for drivers that load firmware
from the probe routine. As b43legacy has such a structure, it must be changed.
As this driver loads 3 or 4 firmware files, changing to the asynchronous routine
request_firmware_nowait() would be complicated. In this implementation, the probe
routine starts a work 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>
This commit is contained in:
Larry Finger 2012-03-08 22:25:57 -06:00 • committed by John W. Linville
commit a3ea2c76b1
2 changed files with 23 additions and 13 deletions
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3
drivers/net/wireless/b43legacy/b43legacy.h
View file

@ -581,6 +581,9 @@ struct b43legacy_wl {
struct mutex mutex; /* locks wireless core state */
spinlock_t leds_lock; /* lock for leds */
/* firmware loading work */
struct work_struct firmware_load;
/* We can only have one operating interface (802.11 core)
* at a time. General information about this interface follows.
*/

33
drivers/net/wireless/b43legacy/main.c
View file

@ -1557,8 +1557,15 @@ err_format:
return -EPROTO;
}
static int b43legacy_request_firmware(struct b43legacy_wldev *dev)
static int b43legacy_one_core_attach(struct ssb_device *dev,
struct b43legacy_wl *wl);
static void b43legacy_one_core_detach(struct ssb_device *dev);
static void b43legacy_request_firmware(struct work_struct *work)
{
struct b43legacy_wl *wl = container_of(work,
struct b43legacy_wl, firmware_load);
struct b43legacy_wldev *dev = wl->current_dev;
struct b43legacy_firmware *fw = &dev->fw;
const u8 rev = dev->dev->id.revision;
const char *filename;
@ -1624,8 +1631,14 @@ static int b43legacy_request_firmware(struct b43legacy_wldev *dev)
if (err)
goto err_load;
}
err = ieee80211_register_hw(wl->hw);
if (err)
goto err_one_core_detach;
return;
return 0;
err_one_core_detach:
b43legacy_one_core_detach(dev->dev);
goto error;
err_load:
b43legacy_print_fw_helptext(dev->wl);
@ -1639,7 +1652,7 @@ err_no_initvals:
error:
b43legacy_release_firmware(dev);
return err;
return;
}
static int b43legacy_upload_microcode(struct b43legacy_wldev *dev)
@ -2153,9 +2166,6 @@ static int b43legacy_chip_init(struct b43legacy_wldev *dev)
macctl |= B43legacy_MACCTL_INFRA;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
err = b43legacy_request_firmware(dev);
if (err)
goto out;
err = b43legacy_upload_microcode(dev);
if (err)
goto out; /* firmware is released later */
@ -3860,17 +3870,13 @@ static int b43legacy_probe(struct ssb_device *dev,
if (err)
goto err_wireless_exit;
if (first) {
err = ieee80211_register_hw(wl->hw);
if (err)
goto err_one_core_detach;
}
/* setup and start work to load firmware */
INIT_WORK(&wl->firmware_load, b43legacy_request_firmware);
schedule_work(&wl->firmware_load);
out:
return err;
err_one_core_detach:
b43legacy_one_core_detach(dev);
err_wireless_exit:
if (first)
b43legacy_wireless_exit(dev, wl);
@ -3885,6 +3891,7 @@ static void b43legacy_remove(struct ssb_device *dev)
/* We must cancel any work here before unregistering from ieee80211,
* as the ieee80211 unreg will destroy the workqueue. */
cancel_work_sync(&wldev->restart_work);
cancel_work_sync(&wl->firmware_load);
B43legacy_WARN_ON(!wl);
if (wl->current_dev == wldev)