From 6b41f941d7cdfb88b0222f5532af5032e4008bb6 Mon Sep 17 00:00:00 2001 From: Amitkumar Karwar Date: Mon, 22 Jul 2013 19:17:55 -0700 Subject: [PATCH] mwifiex: handle driver initialization error paths mwifiex_fw_dpc() asynchronously takes care of firmware download and initialization. Currently the error paths in mwifiex_fw_dpc() are not handled. So if wrong firmware is downloaded, required cleanup work is not performed. memory is leaked and workqueue remains unterminated in this case. mwifiex_terminate_workqueue() is moved to avoid forward declaration. Signed-off-by: Amitkumar Karwar Signed-off-by: Bing Zhao Signed-off-by: John W. Linville --- drivers/net/wireless/mwifiex/main.c | 83 +++++++++++++++++++---------- drivers/net/wireless/mwifiex/main.h | 1 + 2 files changed, 56 insertions(+), 28 deletions(-) diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c index e64c369f3024..5644c7f86fcb 100644 --- a/drivers/net/wireless/mwifiex/main.c +++ b/drivers/net/wireless/mwifiex/main.c @@ -389,6 +389,17 @@ static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) pr_debug("info: %s: free adapter\n", __func__); } +/* + * This function cancels all works in the queue and destroys + * the main workqueue. + */ +static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) +{ + flush_workqueue(adapter->workqueue); + destroy_workqueue(adapter->workqueue); + adapter->workqueue = NULL; +} + /* * This function gets firmware and initializes it. * @@ -398,7 +409,7 @@ static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) */ static void mwifiex_fw_dpc(const struct firmware *firmware, void *context) { - int ret; + int ret, i; char fmt[64]; struct mwifiex_private *priv; struct mwifiex_adapter *adapter = context; @@ -407,7 +418,7 @@ static void mwifiex_fw_dpc(const struct firmware *firmware, void *context) if (!firmware) { dev_err(adapter->dev, "Failed to get firmware %s\n", adapter->fw_name); - goto done; + goto err_dnld_fw; } memset(&fw, 0, sizeof(struct mwifiex_fw_image)); @@ -420,7 +431,7 @@ static void mwifiex_fw_dpc(const struct firmware *firmware, void *context) else ret = mwifiex_dnld_fw(adapter, &fw); if (ret == -1) - goto done; + goto err_dnld_fw; dev_notice(adapter->dev, "WLAN FW is active\n"); @@ -432,13 +443,15 @@ static void mwifiex_fw_dpc(const struct firmware *firmware, void *context) } /* enable host interrupt after fw dnld is successful */ - if (adapter->if_ops.enable_int) - adapter->if_ops.enable_int(adapter); + if (adapter->if_ops.enable_int) { + if (adapter->if_ops.enable_int(adapter)) + goto err_dnld_fw; + } adapter->init_wait_q_woken = false; ret = mwifiex_init_fw(adapter); if (ret == -1) { - goto done; + goto err_init_fw; } else if (!ret) { adapter->hw_status = MWIFIEX_HW_STATUS_READY; goto done; @@ -447,12 +460,12 @@ static void mwifiex_fw_dpc(const struct firmware *firmware, void *context) wait_event_interruptible(adapter->init_wait_q, adapter->init_wait_q_woken); if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) - goto done; + goto err_init_fw; priv = adapter->priv[MWIFIEX_BSS_ROLE_STA]; if (mwifiex_register_cfg80211(adapter)) { dev_err(adapter->dev, "cannot register with cfg80211\n"); - goto err_init_fw; + goto err_register_cfg80211; } rtnl_lock(); @@ -483,13 +496,39 @@ static void mwifiex_fw_dpc(const struct firmware *firmware, void *context) goto done; err_add_intf: - mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev); + for (i = 0; i < adapter->priv_num; i++) { + priv = adapter->priv[i]; + + if (!priv) + continue; + + if (priv->wdev && priv->netdev) + mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev); + } rtnl_unlock(); +err_register_cfg80211: + wiphy_unregister(adapter->wiphy); + wiphy_free(adapter->wiphy); err_init_fw: if (adapter->if_ops.disable_int) adapter->if_ops.disable_int(adapter); +err_dnld_fw: pr_debug("info: %s: unregister device\n", __func__); - adapter->if_ops.unregister_dev(adapter); + if (adapter->if_ops.unregister_dev) + adapter->if_ops.unregister_dev(adapter); + + if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) || + (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) { + pr_debug("info: %s: shutdown mwifiex\n", __func__); + adapter->init_wait_q_woken = false; + + if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) + wait_event_interruptible(adapter->init_wait_q, + adapter->init_wait_q_woken); + } + adapter->surprise_removed = true; + mwifiex_terminate_workqueue(adapter); + mwifiex_free_adapter(adapter); done: if (adapter->cal_data) { release_firmware(adapter->cal_data); @@ -497,6 +536,7 @@ done: } release_firmware(adapter->firmware); complete(&adapter->fw_load); + up(adapter->card_sem); return; } @@ -806,18 +846,6 @@ static void mwifiex_main_work_queue(struct work_struct *work) mwifiex_main_process(adapter); } -/* - * This function cancels all works in the queue and destroys - * the main workqueue. - */ -static void -mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) -{ - flush_workqueue(adapter->workqueue); - destroy_workqueue(adapter->workqueue); - adapter->workqueue = NULL; -} - /* * This function adds the card. * @@ -846,6 +874,7 @@ mwifiex_add_card(void *card, struct semaphore *sem, } adapter->iface_type = iface_type; + adapter->card_sem = sem; adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; adapter->surprise_removed = false; @@ -876,17 +905,12 @@ mwifiex_add_card(void *card, struct semaphore *sem, goto err_init_fw; } - up(sem); return 0; err_init_fw: pr_debug("info: %s: unregister device\n", __func__); if (adapter->if_ops.unregister_dev) adapter->if_ops.unregister_dev(adapter); -err_registerdev: - adapter->surprise_removed = true; - mwifiex_terminate_workqueue(adapter); -err_kmalloc: if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) || (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) { pr_debug("info: %s: shutdown mwifiex\n", __func__); @@ -896,7 +920,10 @@ err_kmalloc: wait_event_interruptible(adapter->init_wait_q, adapter->init_wait_q_woken); } - +err_registerdev: + adapter->surprise_removed = true; + mwifiex_terminate_workqueue(adapter); +err_kmalloc: mwifiex_free_adapter(adapter); err_init_sw: diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h index bb28d3dc0164..9ee3b1b7c365 100644 --- a/drivers/net/wireless/mwifiex/main.h +++ b/drivers/net/wireless/mwifiex/main.h @@ -749,6 +749,7 @@ struct mwifiex_adapter { atomic_t is_tx_received; atomic_t pending_bridged_pkts; + struct semaphore *card_sem; }; int mwifiex_init_lock_list(struct mwifiex_adapter *adapter); -- 2.20.1