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parport: quickfix the proc registration bug
Ideally we should have a directory of drivers and a link to the 'active' driver. For now just show the first device which is effectively the existing semantics without a warning. This is an update on the original buggy patch that I then forgot to resubmit. Confusingly it was proposed by Red Hat, written by Etched Pixels fixed and submitted by Intel ... Resolves-Bug: http://bugzilla.kernel.org/show_bug.cgi?id=9749 Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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parent
d3ae33efb8
commit
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2 changed files with 14 additions and 3 deletions
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@ -614,7 +614,10 @@ parport_register_device(struct parport *port, const char *name,
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* pardevice fields. -arca
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*/
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port->ops->init_state(tmp, tmp->state);
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if (!test_and_set_bit(PARPORT_DEVPROC_REGISTERED, &port->devflags)) {
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port->proc_device = tmp;
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parport_device_proc_register(tmp);
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}
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return tmp;
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out_free_all:
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@ -646,10 +649,14 @@ void parport_unregister_device(struct pardevice *dev)
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}
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#endif
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parport_device_proc_unregister(dev);
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port = dev->port->physport;
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if (port->proc_device == dev) {
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port->proc_device = NULL;
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clear_bit(PARPORT_DEVPROC_REGISTERED, &port->devflags);
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parport_device_proc_unregister(dev);
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}
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if (port->cad == dev) {
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printk(KERN_DEBUG "%s: %s forgot to release port\n",
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port->name, dev->name);
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@ -324,6 +324,10 @@ struct parport {
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int spintime;
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atomic_t ref_count;
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unsigned long devflags;
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#define PARPORT_DEVPROC_REGISTERED 0
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struct pardevice *proc_device; /* Currently register proc device */
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struct list_head full_list;
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struct parport *slaves[3];
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};
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