serial: 8250: 8250_core: Fix irq name for 8250 serial IRQ

r-vignesh · gregkh · commit b2c663d155e1 · 2017-03-31T16:56:10.000+02:00
Using dev_name() as IRQ name during request_irq() might be misleading in
case of serial over PCI. Therefore identify serial port IRQ using
uart_port's name field. This will help mapping IRQs to appropriate
ttySN(where N is the serial port index) instances.

Signed-off-by: Vignesh R &lt;vigneshr@ti.com&gt;
Reviewed-by: Andy Shevchenko &lt;andy.shevchenko@gmail.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
@@ -218,7 +218,7 @@ static int serial_link_irq_chain(struct uart_8250_port *up)
 		spin_unlock_irq(&i->lock);
 		irq_flags |= up->port.irqflags;
 		ret = request_irq(up->port.irq, serial8250_interrupt,
-				  irq_flags, dev_name(up->port.dev), i);
+				  irq_flags, up->port.name, i);
 		if (ret < 0)
 			serial_do_unlink(i, up);
 	}

Original file line number	Diff line number	Diff line change
`@@ -218,7 +218,7 @@ static int serial_link_irq_chain(struct uart_8250_port *up)`
`218`	`218`	`spin_unlock_irq(&i->lock);`
`219`	`219`	`irq_flags \|= up->port.irqflags;`
`220`	`220`	`ret = request_irq(up->port.irq, serial8250_interrupt,`
`221`		`- irq_flags, dev_name(up->port.dev), i);`
	`221`	`+ irq_flags, up->port.name, i);`
`222`	`222`	`if (ret < 0)`
`223`	`223`	`serial_do_unlink(i, up);`
`224`	`224`	`}`