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authorZhang, Yanmin <yanmin_zhang@linux.intel.com>2007-07-15 23:39:39 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 09:05:40 -0700
commited4aaadb1a7913f509f05d3e67840541a180713f (patch)
tree7089fd2fe0f56d552ea153e2925363d0febaa952 /include/linux/pci.h
parent012bfdf00ce2f36a1add75a0d18303656c6294ef (diff)
downloadlwn-ed4aaadb1a7913f509f05d3e67840541a180713f.tar.gz
lwn-ed4aaadb1a7913f509f05d3e67840541a180713f.zip
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 <yanmin.zhang@intel.com> Cc: Greg KH <greg@kroah.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/pci.h')
-rw-r--r--include/linux/pci.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 37a71580ad8a..5e84f2e8d54c 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -432,6 +432,8 @@ extern struct bus_type pci_bus_type;
* code, or pci core code. */
extern struct list_head pci_root_buses; /* list of all known PCI buses */
extern struct list_head pci_devices; /* list of all devices */
+/* Some device drivers need know if pci is initiated */
+extern int no_pci_devices(void);
void pcibios_fixup_bus(struct pci_bus *);
int __must_check pcibios_enable_device(struct pci_dev *, int mask);
@@ -724,6 +726,7 @@ static inline struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *
{ return NULL; }
#define pci_dev_present(ids) (0)
+#define no_pci_devices() (1)
#define pci_find_present(ids) (NULL)
#define pci_dev_put(dev) do { } while (0)