A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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fix jvc cdrom drive lockup

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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 <[email protected]>
Cc: Greg KH <[email protected]>
Cc: Bartlomiej Zolnierkiewicz <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Zhang, Yanmin 2007-07-15 23:39:39 -07:00 • committed by Linus Torvalds
commit ed4aaadb1a
3 changed files with 16 additions and 3 deletions
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4
include/asm-i386/ide.h
View file

@ -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;