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ppdev: use new parport device model

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Modify ppdev driver to use the new parallel port device model.

Initially submitted and committed as:
e7223f1860 ("ppdev: use new parport device model")

But due to some regression it was reverted by:
1701f68040 ("Revert "ppdev: use new parport device model"")

Now that the original source of regression is fixed by:
bbca503b2e ("parport: use subsys_initcall") we can again modify ppdev
to use device model.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sudip Mukherjee 2016-06-01 17:50:08 +05:30 committed by Greg Kroah-Hartman
parent 5ed22cebba
commit 8b7d3a9d90
1 changed files with 20 additions and 5 deletions
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25
drivers/char/ppdev.c
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@ -286,7 +286,7 @@ static int register_device(int minor, struct pp_struct *pp)
struct parport *port;
struct pardevice *pdev = NULL;
char *name;
int fl;
struct pardev_cb ppdev_cb;
name = kasprintf(GFP_KERNEL, CHRDEV "%x", minor);
if (name == NULL)
@ -299,9 +299,11 @@ static int register_device(int minor, struct pp_struct *pp)
return -ENXIO;
}
fl = (pp->flags & PP_EXCL) ? PARPORT_FLAG_EXCL : 0;
pdev = parport_register_device(port, name, NULL,
NULL, pp_irq, fl, pp);
memset(&ppdev_cb, 0, sizeof(ppdev_cb));
ppdev_cb.irq_func = pp_irq;
ppdev_cb.flags = (pp->flags & PP_EXCL) ? PARPORT_FLAG_EXCL : 0;
ppdev_cb.private = pp;
pdev = parport_register_dev_model(port, name, &ppdev_cb, minor);
parport_put_port(port);
if (!pdev) {
@ -799,10 +801,23 @@ static void pp_detach(struct parport *port)
device_destroy(ppdev_class, MKDEV(PP_MAJOR, port->number));
}
static int pp_probe(struct pardevice *par_dev)
{
struct device_driver *drv = par_dev->dev.driver;
int len = strlen(drv->name);
if (strncmp(par_dev->name, drv->name, len))
return -ENODEV;
return 0;
}
static struct parport_driver pp_driver = {
.name = CHRDEV,
.attach = pp_attach,
.probe = pp_probe,
.match_port = pp_attach,
.detach = pp_detach,
.devmodel = true,
};
static int __init ppdev_init(void)