UEAGLE: Do not sleep when device is disconnected
Do not sleep in kernel thread when device is disconnected, this make faster
suspending and module unloading. Use one wait queue for sleeping.
Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c
index 648c6b7..4aa41a9 100644
--- a/drivers/usb/atm/ueagle-atm.c
+++ b/drivers/usb/atm/ueagle-atm.c
@@ -161,7 +161,6 @@
struct task_struct *kthread;
u32 data;
u32 data1;
- wait_queue_head_t cmv_ack_wait;
int cmv_ack;
union cmv_dsc cmv_dsc;
@@ -558,6 +557,15 @@
MODULE_PARM_DESC(annex,
"manually set annex a/b (0=auto, 1=annex a, 2=annex b)");
+#define uea_wait(sc, cond, timeo) \
+({ \
+ int _r = wait_event_interruptible_timeout(sc->sync_q, \
+ (cond) || kthread_should_stop(), timeo); \
+ if (kthread_should_stop()) \
+ _r = -ENODEV; \
+ _r; \
+})
+
#define UPDATE_ATM_STAT(type, val) \
do { \
if (sc->usbatm->atm_dev) \
@@ -1067,13 +1075,13 @@
{
BUG_ON(sc->cmv_ack);
sc->cmv_ack = 1;
- wake_up(&sc->cmv_ack_wait);
+ wake_up(&sc->sync_q);
}
static inline int wait_cmv_ack(struct uea_softc *sc)
{
- int ret = wait_event_interruptible_timeout(sc->cmv_ack_wait,
- sc->cmv_ack, ACK_TIMEOUT);
+ int ret = uea_wait(sc, sc->cmv_ack , ACK_TIMEOUT);
+
sc->cmv_ack = 0;
uea_dbg(INS_TO_USBDEV(sc), "wait_event_timeout : %d ms\n",
@@ -1806,7 +1814,9 @@
uea_request(sc, UEA_SET_MODE, UEA_START_RESET, 0, NULL);
/* original driver use 200ms, but windows driver use 100ms */
- msleep(100);
+ ret = uea_wait(sc, 0, msecs_to_jiffies(100));
+ if (ret < 0)
+ return ret;
/* leave reset mode */
uea_request(sc, UEA_SET_MODE, UEA_END_RESET, 0, NULL);
@@ -1818,7 +1828,9 @@
uea_request(sc, UEA_SET_2183_DATA, UEA_SWAP_MAILBOX, 2, &zero);
}
- msleep(1000);
+ ret = uea_wait(sc, 0, msecs_to_jiffies(1000));
+ if (ret < 0)
+ return ret;
if (UEA_CHIP_VERSION(sc) == EAGLE_IV)
sc->cmv_dsc.e4.function = E4_MAKEFUNCTION(E4_ADSLDIRECTIVE, E4_MODEMREADY, 1);
@@ -1868,7 +1880,7 @@
if (!ret)
ret = sc->stat(sc);
if (ret != -EAGAIN)
- msleep_interruptible(1000);
+ uea_wait(sc, 0, msecs_to_jiffies(1000));
if (try_to_freeze())
uea_err(INS_TO_USBDEV(sc), "suspend/resume not supported, "
"please unplug/replug your modem\n");
@@ -2116,7 +2128,6 @@
}
init_waitqueue_head(&sc->sync_q);
- init_waitqueue_head(&sc->cmv_ack_wait);
sc->work_q = create_workqueue("ueagle-dsp");
if (!sc->work_q) {