forked from Minki/linux
hso: fix oops in read/write callbacks
The tty may be closed already when the read/write callbacks are called. This patch checks that the ttys still exist before waking them up. Signed-off-by: Olivier Blin <blino@mandriva.com> Acked-by: Alan Cox <alan@redhat.com> Cc: Jari Tenhunen <jari.tenhunen@iki.fi> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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@ -1467,7 +1467,8 @@ static void hso_std_serial_write_bulk_callback(struct urb *urb)
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return;
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return;
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}
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}
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hso_put_activity(serial->parent);
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hso_put_activity(serial->parent);
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tty_wakeup(serial->tty);
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if (serial->tty)
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tty_wakeup(serial->tty);
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hso_kick_transmit(serial);
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hso_kick_transmit(serial);
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D1(" ");
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D1(" ");
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@ -1538,7 +1539,8 @@ static void ctrl_callback(struct urb *urb)
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clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags);
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clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags);
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} else {
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} else {
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hso_put_activity(serial->parent);
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hso_put_activity(serial->parent);
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tty_wakeup(serial->tty);
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if (serial->tty)
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tty_wakeup(serial->tty);
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/* response to a write command */
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/* response to a write command */
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hso_kick_transmit(serial);
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hso_kick_transmit(serial);
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}
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}
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