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max3110: wake up fixes
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The main thread is waiting on on a wait_queue but wake_up_process() is
used to wake the thread. This reads weirdly. Change wake_up_process() to
wake_up().

Tested on the Moorestown tablet build

Signed-off-by: Dirk Brandewie <[email protected]>
Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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dirk-brandewie authored and gregkh committed Aug 26, 2011
1 parent f17141f commit 7b18bd5
Showing 1 changed file with 7 additions and 4 deletions.
11 changes: 7 additions & 4 deletions drivers/tty/serial/mrst_max3110.c
Original file line number Diff line number Diff line change
Expand Up @@ -207,7 +207,7 @@ static void serial_m3110_con_write(struct console *co,
uart_console_write(&pmax->port, s, count, serial_m3110_con_putchar);

if (!test_and_set_bit(CON_TX_NEEDED, &pmax->uart_flags))
wake_up_process(pmax->main_thread);
wake_up(&pmax->wq);
}

static int __init
Expand Down Expand Up @@ -301,6 +301,7 @@ static void send_circ_buf(struct uart_max3110 *max,
}

/* Fail to send msg to console is not very critical */

ret = max3110_write_then_read(max, obuf, ibuf, blen, 0);
if (ret)
pr_warning(PR_FMT "%s(): get err msg %d\n",
Expand Down Expand Up @@ -349,7 +350,7 @@ static void serial_m3110_start_tx(struct uart_port *port)
container_of(port, struct uart_max3110, port);

if (!test_and_set_bit(UART_TX_NEEDED, &max->uart_flags))
wake_up_process(max->main_thread);
wake_up(&max->wq);
}

static void receive_chars(struct uart_max3110 *max, unsigned char *str, int len)
Expand Down Expand Up @@ -424,7 +425,8 @@ static int max3110_main_thread(void *_max)
pr_info(PR_FMT "start main thread\n");

do {
wait_event_interruptible(*wq, max->uart_flags || kthread_should_stop());
wait_event_interruptible(*wq,
max->uart_flags || kthread_should_stop());

mutex_lock(&max->thread_mutex);

Expand Down Expand Up @@ -452,8 +454,9 @@ static irqreturn_t serial_m3110_irq(int irq, void *dev_id)

/* max3110's irq is a falling edge, not level triggered,
* so no need to disable the irq */

if (!test_and_set_bit(BIT_IRQ_PENDING, &max->uart_flags))
wake_up_process(max->main_thread);
wake_up(&max->wq);

return IRQ_HANDLED;
}
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