From 70398a59297965d4af1a0022660bb103dfa59c42 Mon Sep 17 00:00:00 2001 From: Hante Meuleman Date: Thu, 27 Sep 2012 14:17:47 +0200 Subject: [PATCH] brcmfmac: use wait_event_timeout for fw control packets over usb. firmware control packets over usb are async acked. This is awaited for by using interruptible wait. This can be interrupted by signal which results in undesirable behavior. Instead wait_event_timeout is used. Reviewed-by: Arend Van Spriel Signed-off-by: Hante Meuleman Signed-off-by: Arend van Spriel Signed-off-by: John W. Linville --- drivers/net/wireless/brcm80211/brcmfmac/usb.c | 46 ++++--------------- 1 file changed, 9 insertions(+), 37 deletions(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/usb.c b/drivers/net/wireless/brcm80211/brcmfmac/usb.c index 5fe6ec7f838e..555ccdd12210 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/usb.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/usb.c @@ -160,40 +160,17 @@ static struct brcmf_usbdev_info *brcmf_usb_get_businfo(struct device *dev) return brcmf_usb_get_buspub(dev)->devinfo; } -static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo, - uint *condition, bool *pending) +static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo) { - DECLARE_WAITQUEUE(wait, current); - int timeout = IOCTL_RESP_TIMEOUT; - - /* Convert timeout in millsecond to jiffies */ - timeout = msecs_to_jiffies(timeout); - /* Wait until control frame is available */ - add_wait_queue(&devinfo->ioctl_resp_wait, &wait); - set_current_state(TASK_INTERRUPTIBLE); - - smp_mb(); - while (!(*condition) && (!signal_pending(current) && timeout)) { - timeout = schedule_timeout(timeout); - /* Wait until control frame is available */ - smp_mb(); - } - - if (signal_pending(current)) - *pending = true; - - set_current_state(TASK_RUNNING); - remove_wait_queue(&devinfo->ioctl_resp_wait, &wait); - - return timeout; + return wait_event_timeout(devinfo->ioctl_resp_wait, + devinfo->ctl_completed, + msecs_to_jiffies(IOCTL_RESP_TIMEOUT)); } -static int brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo) +static void brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo) { if (waitqueue_active(&devinfo->ioctl_resp_wait)) - wake_up_interruptible(&devinfo->ioctl_resp_wait); - - return 0; + wake_up(&devinfo->ioctl_resp_wait); } static void @@ -322,7 +299,6 @@ static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len) { int err = 0; int timeout = 0; - bool pending; struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev); if (devinfo->bus_pub.state != BCMFMAC_USB_STATE_UP) { @@ -340,9 +316,7 @@ static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len) clear_bit(0, &devinfo->ctl_op); return err; } - - timeout = brcmf_usb_ioctl_resp_wait(devinfo, &devinfo->ctl_completed, - &pending); + timeout = brcmf_usb_ioctl_resp_wait(devinfo); clear_bit(0, &devinfo->ctl_op); if (!timeout) { brcmf_dbg(ERROR, "Txctl wait timed out\n"); @@ -355,7 +329,6 @@ static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len) { int err = 0; int timeout = 0; - bool pending; struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev); if (devinfo->bus_pub.state != BCMFMAC_USB_STATE_UP) { @@ -365,15 +338,14 @@ static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len) if (test_and_set_bit(0, &devinfo->ctl_op)) return -EIO; + devinfo->ctl_completed = false; err = brcmf_usb_recv_ctl(devinfo, buf, len); if (err) { brcmf_dbg(ERROR, "fail %d bytes: %d\n", err, len); clear_bit(0, &devinfo->ctl_op); return err; } - devinfo->ctl_completed = false; - timeout = brcmf_usb_ioctl_resp_wait(devinfo, &devinfo->ctl_completed, - &pending); + timeout = brcmf_usb_ioctl_resp_wait(devinfo); err = devinfo->ctl_urb_status; clear_bit(0, &devinfo->ctl_op); if (!timeout) { -- 2.34.1