diff options
| author | Ingo Molnar <mingo@kernel.org> | 2013-04-08 17:41:50 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-04-08 17:41:50 +0200 |
| commit | b6d5278dc8385eaf2e3904a4af444a04f6ae4e71 (patch) | |
| tree | 14e6031e0efa8e8b684db3b7ff85f8ac63ed0824 /drivers/usb/serial/cypress_m8.c | |
| parent | bafcdd3b6cb86035cdb0511450961edcdc084c27 (diff) | |
| parent | 7a0c819d28f5c91955854e048766d6afef7c8a3d (diff) | |
Merge tag 'please-pull-cmci_rediscover' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras into x86/ras
Pull clean up of the cmci_rediscover code to fix problems found by Dave Jones,
from Tony Luck.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/usb/serial/cypress_m8.c')
| -rw-r--r-- | drivers/usb/serial/cypress_m8.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c index 8efa19d0e9fb..ba7352e4187e 100644 --- a/drivers/usb/serial/cypress_m8.c +++ b/drivers/usb/serial/cypress_m8.c @@ -111,7 +111,6 @@ struct cypress_private { int baud_rate; /* stores current baud rate in integer form */ int isthrottled; /* if throttled, discard reads */ - wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ char prev_status, diff_status; /* used for TIOCMIWAIT */ /* we pass a pointer to this as the argument sent to cypress_set_termios old_termios */ @@ -449,7 +448,6 @@ static int cypress_generic_port_probe(struct usb_serial_port *port) kfree(priv); return -ENOMEM; } - init_waitqueue_head(&priv->delta_msr_wait); usb_reset_configuration(serial->dev); @@ -868,12 +866,16 @@ static int cypress_ioctl(struct tty_struct *tty, switch (cmd) { /* This code comes from drivers/char/serial.c and ftdi_sio.c */ case TIOCMIWAIT: - while (priv != NULL) { - interruptible_sleep_on(&priv->delta_msr_wait); + for (;;) { + interruptible_sleep_on(&port->delta_msr_wait); /* see if a signal did it */ if (signal_pending(current)) return -ERESTARTSYS; - else { + + if (port->serial->disconnected) + return -EIO; + + { char diff = priv->diff_status; if (diff == 0) return -EIO; /* no change => error */ @@ -1187,7 +1189,7 @@ static void cypress_read_int_callback(struct urb *urb) if (priv->current_status != priv->prev_status) { priv->diff_status |= priv->current_status ^ priv->prev_status; - wake_up_interruptible(&priv->delta_msr_wait); + wake_up_interruptible(&port->delta_msr_wait); priv->prev_status = priv->current_status; } spin_unlock_irqrestore(&priv->lock, flags); |