Messages in this thread Patch in this message | | | From | Lars-Peter Clausen <> | Subject | [PATCH] tty: nwpserial: Pass correct pointer to free_irq() | Date | Mon, 20 May 2013 19:07:30 +0200 |
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free_irq() expects the same pointer that was passed to request_irq(), otherwise the IRQ is not freed.
The issue was found using the following coccinelle script:
<smpl> @r1@ type T; T devid; @@ request_irq(..., devid)
@r2@ type r1.T; T devid; position p; @@ free_irq@p(..., devid)
@@ position p != r2.p; @@ *free_irq@p(...) </smpl>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> --- drivers/tty/serial/nwpserial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/serial/nwpserial.c b/drivers/tty/serial/nwpserial.c index 77287c5..549c70a 100644 --- a/drivers/tty/serial/nwpserial.c +++ b/drivers/tty/serial/nwpserial.c @@ -199,7 +199,7 @@ static void nwpserial_shutdown(struct uart_port *port) dcr_write(up->dcr_host, UART_IER, up->ier); /* free irq */ - free_irq(up->port.irq, port); + free_irq(up->port.irq, up); } static int nwpserial_verify_port(struct uart_port *port, -- 1.8.0
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