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| author | Zhang, Yanmin <yanmin_zhang@linux.intel.com> | 2007-07-15 23:39:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 09:05:40 -0700 |
| commit | ed4aaadb1a7913f509f05d3e67840541a180713f (patch) | |
| tree | 7089fd2fe0f56d552ea153e2925363d0febaa952 | |
| parent | 012bfdf00ce2f36a1add75a0d18303656c6294ef (diff) | |
| download | linux-3.10-ed4aaadb1a7913f509f05d3e67840541a180713f.tar.gz linux-3.10-ed4aaadb1a7913f509f05d3e67840541a180713f.tar.bz2 linux-3.10-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>
| -rw-r--r-- | drivers/pci/probe.c | 12 | ||||
| -rw-r--r-- | include/asm-i386/ide.h | 4 | ||||
| -rw-r--r-- | include/linux/pci.h | 3 |
3 files changed, 16 insertions, 3 deletions
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 diff --git a/include/asm-i386/ide.h b/include/asm-i386/ide.h index 0fc240c80f4..e7817a3d657 100644 --- a/include/asm-i386/ide.h +++ b/include/asm-i386/ide.h @@ -40,14 +40,13 @@ static __inline__ int ide_default_irq(unsigned long base) static __inline__ unsigned long ide_default_io_base(int index) { - struct pci_dev *pdev; /* * If PCI is present then it is not safe to poke around * the other legacy IDE ports. Only 0x1f0 and 0x170 are * defined compatibility mode ports for PCI. A user can * override this using ide= but we must default safe. */ - if ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL)) == NULL) { + if (no_pci_devices()) { switch(index) { case 2: return 0x1e8; case 3: return 0x168; @@ -55,7 +54,6 @@ static __inline__ unsigned long ide_default_io_base(int index) case 5: return 0x160; } } - pci_dev_put(pdev); switch (index) { case 0: return 0x1f0; case 1: return 0x170; diff --git a/include/linux/pci.h b/include/linux/pci.h index 37a71580ad8..5e84f2e8d54 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) |