staging: r8712u: Use asynchronous firmware loading

In https://bugs.archlinux.org/task/27996, failure of driver r8712u is
reported, with a timeout during module loading due to synchronous loading
of the firmware. The code now uses request_firmware_nowait().

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Larry Finger 2012-02-05 21:12:26 -06:00 committed by Greg Kroah-Hartman
parent 737912e11b
commit 8c213fa591
5 changed files with 69 additions and 26 deletions

View File

@ -37,6 +37,8 @@ struct _adapter;
#include "wlan_bssdef.h"
#include "rtl8712_spec.h"
#include "rtl8712_hal.h"
#include <linux/mutex.h>
#include <linux/completion.h>
enum _NIC_VERSION {
RTL8711_NIC,
@ -168,6 +170,7 @@ struct _adapter {
s32 bSurpriseRemoved;
u32 IsrContent;
u32 ImrContent;
bool fw_found;
u8 EepromAddressSize;
u8 hw_init_completed;
struct task_struct *cmdThread;
@ -184,6 +187,10 @@ struct _adapter {
_workitem wkFilterRxFF0;
u8 blnEnableRxFF0Filter;
spinlock_t lockRxFF0Filter;
const struct firmware *fw;
struct usb_interface *pusb_intf;
struct mutex mutex_start;
struct completion rtl8712_fw_ready;
};
static inline u8 *myid(struct eeprom_priv *peepriv)

View File

@ -42,29 +42,56 @@
#define FWBUFF_ALIGN_SZ 512
#define MAX_DUMP_FWSZ 49152 /*default = 49152 (48k)*/
static u32 rtl871x_open_fw(struct _adapter *padapter, void **pphfwfile_hdl,
const u8 **ppmappedfw)
static void rtl871x_load_fw_cb(const struct firmware *firmware, void *context)
{
int rc;
const char firmware_file[] = "rtlwifi/rtl8712u.bin";
const struct firmware **praw = (const struct firmware **)
(pphfwfile_hdl);
struct dvobj_priv *pdvobjpriv = (struct dvobj_priv *)
(&padapter->dvobjpriv);
struct usb_device *pusbdev = pdvobjpriv->pusbdev;
struct _adapter *padapter = context;
complete(&padapter->rtl8712_fw_ready);
if (!firmware) {
struct usb_device *udev = padapter->dvobjpriv.pusbdev;
struct usb_interface *pusb_intf = padapter->pusb_intf;
printk(KERN_ERR "r8712u: Firmware request failed\n");
padapter->fw_found = false;
usb_put_dev(udev);
usb_set_intfdata(pusb_intf, NULL);
return;
}
padapter->fw = firmware;
padapter->fw_found = true;
/* firmware available - start netdev */
register_netdev(padapter->pnetdev);
}
static const char firmware_file[] = "rtlwifi/rtl8712u.bin";
int rtl871x_load_fw(struct _adapter *padapter)
{
struct device *dev = &padapter->dvobjpriv.pusbdev->dev;
int rc;
init_completion(&padapter->rtl8712_fw_ready);
printk(KERN_INFO "r8712u: Loading firmware from \"%s\"\n",
firmware_file);
rc = request_firmware(praw, firmware_file, &pusbdev->dev);
if (rc < 0) {
printk(KERN_ERR "r8712u: Unable to load firmware\n");
printk(KERN_ERR "r8712u: Install latest linux-firmware\n");
rc = request_firmware_nowait(THIS_MODULE, 1, firmware_file, dev,
GFP_KERNEL, padapter, rtl871x_load_fw_cb);
if (rc)
printk(KERN_ERR "r8712u: Firmware request error %d\n", rc);
return rc;
}
MODULE_FIRMWARE("rtlwifi/rtl8712u.bin");
static u32 rtl871x_open_fw(struct _adapter *padapter, const u8 **ppmappedfw)
{
const struct firmware **praw = &padapter->fw;
if (padapter->fw->size > 200000) {
printk(KERN_ERR "r8172u: Badfw->size of %d\n",
(int)padapter->fw->size);
return 0;
}
*ppmappedfw = (u8 *)((*praw)->data);
return (*praw)->size;
}
MODULE_FIRMWARE("rtlwifi/rtl8712u.bin");
static void fill_fwpriv(struct _adapter *padapter, struct fw_priv *pfwpriv)
{
@ -142,18 +169,17 @@ static u8 rtl8712_dl_fw(struct _adapter *padapter)
uint dump_imem_sz, imem_sz, dump_emem_sz, emem_sz; /* max = 49152; */
struct fw_hdr fwhdr;
u32 ulfilelength; /* FW file size */
void *phfwfile_hdl = NULL;
const u8 *pmappedfw = NULL;
u8 *ptmpchar = NULL, *ppayload, *ptr;
struct tx_desc *ptx_desc;
u32 txdscp_sz = sizeof(struct tx_desc);
u8 ret = _FAIL;
ulfilelength = rtl871x_open_fw(padapter, &phfwfile_hdl, &pmappedfw);
ulfilelength = rtl871x_open_fw(padapter, &pmappedfw);
if (pmappedfw && (ulfilelength > 0)) {
update_fwhdr(&fwhdr, pmappedfw);
if (chk_fwhdr(&fwhdr, ulfilelength) == _FAIL)
goto firmware_rel;
return ret;
fill_fwpriv(padapter, &fwhdr.fwpriv);
/* firmware check ok */
maxlen = (fwhdr.img_IMEM_size > fwhdr.img_SRAM_size) ?
@ -161,7 +187,7 @@ static u8 rtl8712_dl_fw(struct _adapter *padapter)
maxlen += txdscp_sz;
ptmpchar = _malloc(maxlen + FWBUFF_ALIGN_SZ);
if (ptmpchar == NULL)
goto firmware_rel;
return ret;
ptx_desc = (struct tx_desc *)(ptmpchar + FWBUFF_ALIGN_SZ -
((addr_t)(ptmpchar) & (FWBUFF_ALIGN_SZ - 1)));
@ -297,8 +323,6 @@ static u8 rtl8712_dl_fw(struct _adapter *padapter)
exit_fail:
kfree(ptmpchar);
firmware_rel:
release_firmware((struct firmware *)phfwfile_hdl);
return ret;
}

View File

@ -31,6 +31,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kthread.h>
#include <linux/firmware.h>
#include "osdep_service.h"
#include "drv_types.h"
#include "xmit_osdep.h"
@ -264,12 +265,12 @@ static void start_drv_timers(struct _adapter *padapter)
void r8712_stop_drv_timers(struct _adapter *padapter)
{
_cancel_timer_ex(&padapter->mlmepriv.assoc_timer);
_cancel_timer_ex(&padapter->mlmepriv.sitesurveyctrl.
sitesurvey_ctrl_timer);
_cancel_timer_ex(&padapter->securitypriv.tkip_timer);
_cancel_timer_ex(&padapter->mlmepriv.scan_to_timer);
_cancel_timer_ex(&padapter->mlmepriv.dhcp_timer);
_cancel_timer_ex(&padapter->mlmepriv.wdg_timer);
_cancel_timer_ex(&padapter->mlmepriv.sitesurveyctrl.
sitesurvey_ctrl_timer);
}
static u8 init_default_value(struct _adapter *padapter)
@ -347,7 +348,8 @@ u8 r8712_free_drv_sw(struct _adapter *padapter)
r8712_free_mlme_priv(&padapter->mlmepriv);
r8712_free_io_queue(padapter);
_free_xmit_priv(&padapter->xmitpriv);
_r8712_free_sta_priv(&padapter->stapriv);
if (padapter->fw_found)
_r8712_free_sta_priv(&padapter->stapriv);
_r8712_free_recv_priv(&padapter->recvpriv);
mp871xdeinit(padapter);
if (pnetdev)
@ -388,6 +390,7 @@ static int netdev_open(struct net_device *pnetdev)
{
struct _adapter *padapter = (struct _adapter *)netdev_priv(pnetdev);
mutex_lock(&padapter->mutex_start);
if (padapter->bup == false) {
padapter->bDriverStopped = false;
padapter->bSurpriseRemoved = false;
@ -435,11 +438,13 @@ static int netdev_open(struct net_device *pnetdev)
/* start driver mlme relation timer */
start_drv_timers(padapter);
padapter->ledpriv.LedControlHandler(padapter, LED_CTL_NO_LINK);
mutex_unlock(&padapter->mutex_start);
return 0;
netdev_open_error:
padapter->bup = false;
netif_carrier_off(pnetdev);
netif_stop_queue(pnetdev);
mutex_unlock(&padapter->mutex_start);
return -1;
}
@ -473,6 +478,9 @@ static int netdev_close(struct net_device *pnetdev)
r8712_free_network_queue(padapter);
/* The interface is no longer Up: */
padapter->bup = false;
release_firmware(padapter->fw);
/* never exit with a firmware callback pending */
wait_for_completion(&padapter->rtl8712_fw_ready);
return 0;
}

View File

@ -145,5 +145,6 @@ struct hal_priv {
};
uint rtl8712_hal_init(struct _adapter *padapter);
int rtl871x_load_fw(struct _adapter *padapter);
#endif

View File

@ -390,6 +390,7 @@ static int r871xu_drv_init(struct usb_interface *pusb_intf,
pdvobjpriv = &padapter->dvobjpriv;
pdvobjpriv->padapter = padapter;
padapter->dvobjpriv.pusbdev = udev;
padapter->pusb_intf = pusb_intf;
usb_set_intfdata(pusb_intf, pnetdev);
SET_NETDEV_DEV(pnetdev, &pusb_intf->dev);
/* step 2. */
@ -596,10 +597,11 @@ static int r871xu_drv_init(struct usb_interface *pusb_intf,
"%pM\n", mac);
memcpy(pnetdev->dev_addr, mac, ETH_ALEN);
}
/* step 6. Tell the network stack we exist */
if (register_netdev(pnetdev) != 0)
/* step 6. Load the firmware asynchronously */
if (rtl871x_load_fw(padapter))
goto error;
spin_lock_init(&padapter->lockRxFF0Filter);
mutex_init(&padapter->mutex_start);
return 0;
error:
usb_put_dev(udev);
@ -630,7 +632,8 @@ static void r871xu_dev_remove(struct usb_interface *pusb_intf)
flush_scheduled_work();
udelay(1);
/*Stop driver mlme relation timer */
r8712_stop_drv_timers(padapter);
if (padapter->fw_found)
r8712_stop_drv_timers(padapter);
r871x_dev_unload(padapter);
r8712_free_drv_sw(padapter);
}