From ed4aaadb1a7913f509f05d3e67840541a180713f Mon Sep 17 00:00:00 2001 From: "Zhang, Yanmin" Date: Sun, 15 Jul 2007 23:39:39 -0700 Subject: fix jvc cdrom drive lockup Before calling init_hwif_default, ide_unregister gets lock ide_lock and disables irq. init_hwif_default calls ide_default_io_base which calls pci_get_device and later pci_get_subsys tries to apply for semaphore pci_bus_sem and goes to sleep. Mostly, pci_get_device should be called when irq is turned on. ide_default_io_base just needs find if list pci_devices is empty. Signed-off-by: Zhang Yanmin Cc: Greg KH Cc: Bartlomiej Zolnierkiewicz Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/pci/probe.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/pci') diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index a7bce75c673..34b8dae0d90 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -22,6 +22,18 @@ EXPORT_SYMBOL(pci_root_buses); LIST_HEAD(pci_devices); +/* + * Some device drivers need know if pci is initiated. + * Basically, we think pci is not initiated when there + * is no device in list of pci_devices. + */ +int no_pci_devices(void) +{ + return list_empty(&pci_devices); +} + +EXPORT_SYMBOL(no_pci_devices); + #ifdef HAVE_PCI_LEGACY /** * pci_create_legacy_files - create legacy I/O port and memory files -- cgit v1.2.3