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Commit 465893e1 authored by Greg Hackmann's avatar Greg Hackmann Committed by Greg Kroah-Hartman
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tty: goldfish: support platform_device with id -1 



When the platform bus sets the platform_device id to -1 (PLATFORM_DEVID_NONE),
use an incrementing counter for the TTY index instead

Signed-off-by: default avatarGreg Hackmann <ghackmann@google.com>
Signed-off-by: default avatarJin Qian <jinqian@android.com>
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9b883eea

drivers/tty/goldfish.c

+18 −12
Original line number Diff line number Diff line
@@ -68,8 +68,7 @@ static void goldfish_tty_do_write(int line, const char *buf, unsigned count) 


static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id)

{

	struct platform_device *pdev = dev_id;

	struct goldfish_tty *qtty = &goldfish_ttys[pdev->id];

	struct goldfish_tty *qtty = dev_id;

	void __iomem *base = qtty->base;

	unsigned long irq_flags;

	unsigned char *buf;
@@ -233,6 +232,7 @@ static int goldfish_tty_probe(struct platform_device *pdev) 
	struct device *ttydev;

	void __iomem *base;

	u32 irq;

	unsigned int line;



	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (r == NULL)
@@ -248,10 +248,16 @@ static int goldfish_tty_probe(struct platform_device *pdev) 


	irq = r->start;



	if (pdev->id >= goldfish_tty_line_count)

		goto err_unmap;



	mutex_lock(&goldfish_tty_lock);



	if (pdev->id == PLATFORM_DEVID_NONE)

		line = goldfish_tty_current_line_count;

	else

		line = pdev->id;



	if (line >= goldfish_tty_line_count)

		goto err_create_driver_failed;



	if (goldfish_tty_current_line_count == 0) {

		ret = goldfish_tty_create_driver();

		if (ret)
@@ -259,7 +265,7 @@ static int goldfish_tty_probe(struct platform_device *pdev) 
	}

	goldfish_tty_current_line_count++;



	qtty = &goldfish_ttys[pdev->id];

	qtty = &goldfish_ttys[line];

	spin_lock_init(&qtty->lock);

	tty_port_init(&qtty->port);

	qtty->port.ops = &goldfish_port_ops;
@@ -269,13 +275,13 @@ static int goldfish_tty_probe(struct platform_device *pdev) 
	writel(GOLDFISH_TTY_CMD_INT_DISABLE, base + GOLDFISH_TTY_CMD);



	ret = request_irq(irq, goldfish_tty_interrupt, IRQF_SHARED,

						"goldfish_tty", pdev);

						"goldfish_tty", qtty);

	if (ret)

		goto err_request_irq_failed;





	ttydev = tty_port_register_device(&qtty->port, goldfish_tty_driver,

							pdev->id, &pdev->dev);

							line, &pdev->dev);

	if (IS_ERR(ttydev)) {

		ret = PTR_ERR(ttydev);

		goto err_tty_register_device_failed;
@@ -286,8 +292,9 @@ static int goldfish_tty_probe(struct platform_device *pdev) 
	qtty->console.device = goldfish_tty_console_device;

	qtty->console.setup = goldfish_tty_console_setup;

	qtty->console.flags = CON_PRINTBUFFER;

	qtty->console.index = pdev->id;

	qtty->console.index = line;

	register_console(&qtty->console);

	platform_set_drvdata(pdev, qtty);



	mutex_unlock(&goldfish_tty_lock);

	return 0;
@@ -307,13 +314,12 @@ static int goldfish_tty_probe(struct platform_device *pdev) 


static int goldfish_tty_remove(struct platform_device *pdev)

{

	struct goldfish_tty *qtty;

	struct goldfish_tty *qtty = platform_get_drvdata(pdev);



	mutex_lock(&goldfish_tty_lock);



	qtty = &goldfish_ttys[pdev->id];

	unregister_console(&qtty->console);

	tty_unregister_device(goldfish_tty_driver, pdev->id);

	tty_unregister_device(goldfish_tty_driver, qtty->console.index);

	iounmap(qtty->base);

	qtty->base = NULL;

	free_irq(qtty->irq, pdev);