forked from Minki/linux
[PATCH] make 8250_pnp serial driver work after suspend to ram
Add suspend/resume methods to drivers/serial/8250_pnp.c. Tested on a P4/HT 16550A box, ttyS0 login survives across suspend to ram. [akpm@osdl.org: cleanups] Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -464,11 +464,38 @@ static void __devexit serial_pnp_remove(struct pnp_dev *dev)
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serial8250_unregister_port(line - 1);
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}
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#ifdef CONFIG_PM
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static int serial_pnp_suspend(struct pnp_dev *dev, pm_message_t state)
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{
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long line = (long)pnp_get_drvdata(dev);
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if (!line)
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return -ENODEV;
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serial8250_suspend_port(line - 1);
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return 0;
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}
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static int serial_pnp_resume(struct pnp_dev *dev)
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{
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long line = (long)pnp_get_drvdata(dev);
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if (!line)
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return -ENODEV;
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serial8250_resume_port(line - 1);
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return 0;
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}
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#else
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#define serial_pnp_suspend NULL
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#define serial_pnp_resume NULL
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#endif /* CONFIG_PM */
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static struct pnp_driver serial_pnp_driver = {
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.name = "serial",
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.id_table = pnp_dev_table,
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.probe = serial_pnp_probe,
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.remove = __devexit_p(serial_pnp_remove),
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.suspend = serial_pnp_suspend,
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.resume = serial_pnp_resume,
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.id_table = pnp_dev_table,
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};
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static int __init serial8250_pnp_init(void)
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