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| author | Ingo Molnar <mingo@elte.hu> | 2011-02-16 13:33:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-02-16 13:33:41 +0100 |
| commit | a3ec4a603faf4244e275bf11b467aad092dfbd8a (patch) | |
| tree | 1c15009716b37629070ea221a00eb9fe2303a317 /drivers/usb/serial/ch341.c | |
| parent | 51563cd53c4b1c1790fccd2e0af0e2b756589af9 (diff) | |
| parent | 85e2efbb1db9a18d218006706d6e4fbeb0216213 (diff) | |
Merge commit 'v2.6.38-rc5' into core/locking
Merge reason: pick up upstream fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/usb/serial/ch341.c')
| -rw-r--r-- | drivers/usb/serial/ch341.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index 63f7cc45bcac..7b8815ddf368 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -486,12 +486,22 @@ static void ch341_read_int_callback(struct urb *urb) if (actual_length >= 4) { struct ch341_private *priv = usb_get_serial_port_data(port); unsigned long flags; + u8 prev_line_status = priv->line_status; spin_lock_irqsave(&priv->lock, flags); priv->line_status = (~(data[2])) & CH341_BITS_MODEM_STAT; if ((data[1] & CH341_MULT_STAT)) priv->multi_status_change = 1; spin_unlock_irqrestore(&priv->lock, flags); + + if ((priv->line_status ^ prev_line_status) & CH341_BIT_DCD) { + struct tty_struct *tty = tty_port_tty_get(&port->port); + if (tty) + usb_serial_handle_dcd_change(port, tty, + priv->line_status & CH341_BIT_DCD); + tty_kref_put(tty); + } + wake_up_interruptible(&priv->delta_msr_wait); } |