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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 <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Amitkumar Karwar 2013-07-22 19:17:55 -07:00 committed by John W. Linville
parent 9d55911e8f
commit 6b41f941d7
2 changed files with 56 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

83
drivers/net/wireless/mwifiex/main.c
View File

@ -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:

1
drivers/net/wireless/mwifiex/main.h
View File

@ -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);