From 6b6fa5868eec26bdc6a83543cebb8cf832a2645a Mon Sep 17 00:00:00 2001 From: Larry Finger Date: Thu, 8 Mar 2012 22:27:46 -0600 Subject: [PATCH] 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 Signed-off-by: John W. Linville --- drivers/net/wireless/b43/b43.h | 3 ++ drivers/net/wireless/b43/main.c | 59 ++++++++++++++++++--------------- 2 files changed, 35 insertions(+), 27 deletions(-) diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h index 835462dc1206..67c13af6f206 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 1d633f3b3274..c79e6638c88d 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); -- 2.30.2