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mtd: r852: remove useless pci powerup/down from suspend/resume routines 

It turns out that pci core now handles these, so this code is redundant
and can even cause bugs

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Maxim Levitsky 2010-10-15 17:20:46 +02:00 committed by David Woodhouse
parent 12aebf3e1a
commit 9bf70717a5
2 changed files with 1 additions and 31 deletions
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30
drivers/mtd/nand/r852.c
View File

@ -757,11 +757,6 @@ static irqreturn_t r852_irq(int irq, void *data)
spin_lock_irqsave(&dev->irqlock, flags);
/* We can recieve shared interrupt while pci is suspended
in that case reads will return 0xFFFFFFFF.... */
if (dev->insuspend)
goto out;
/* handle card detection interrupts first */
card_status = r852_read_reg(dev, R852_CARD_IRQ_STA);
r852_write_reg(dev, R852_CARD_IRQ_STA, card_status);
@ -1035,7 +1030,6 @@ void r852_shutdown(struct pci_dev *pci_dev)
int r852_suspend(struct device *device)
{
struct r852_device *dev = pci_get_drvdata(to_pci_dev(device));
unsigned long flags;
if (dev->ctlreg & R852_CTL_CARDENABLE)
return -EBUSY;
@ -1047,43 +1041,22 @@ int r852_suspend(struct device *device)
r852_disable_irqs(dev);
r852_engine_disable(dev);
spin_lock_irqsave(&dev->irqlock, flags);
dev->insuspend = 1;
spin_unlock_irqrestore(&dev->irqlock, flags);
/* At that point, even if interrupt handler is running, it will quit */
/* So wait for this to happen explictly */
synchronize_irq(dev->irq);
/* If card was pulled off just during the suspend, which is very
unlikely, we will remove it on resume, it too late now
anyway... */
dev->card_unstable = 0;
pci_save_state(to_pci_dev(device));
return pci_prepare_to_sleep(to_pci_dev(device));
return 0;
}
int r852_resume(struct device *device)
{
struct r852_device *dev = pci_get_drvdata(to_pci_dev(device));
unsigned long flags;
/* Turn on the hardware */
pci_back_from_sleep(to_pci_dev(device));
pci_restore_state(to_pci_dev(device));
r852_disable_irqs(dev);
r852_card_update_present(dev);
r852_engine_disable(dev);
/* Now its safe for IRQ to run */
spin_lock_irqsave(&dev->irqlock, flags);
dev->insuspend = 0;
spin_unlock_irqrestore(&dev->irqlock, flags);
/* If card status changed, just do the work */
if (dev->card_detected != dev->card_registred) {
dbg("card was %s during low power state",
@ -1121,7 +1094,6 @@ MODULE_DEVICE_TABLE(pci, r852_pci_id_tbl);
SIMPLE_DEV_PM_OPS(r852_pm_ops, r852_suspend, r852_resume);
static struct pci_driver r852_pci_driver = {
.name = DRV_NAME,
.id_table = r852_pci_id_tbl,

2
drivers/mtd/nand/r852.h
View File

@ -140,8 +140,6 @@ struct r852_device {
/* interrupt handling */
spinlock_t irqlock; /* IRQ protecting lock */
int irq; /* irq num */
int insuspend; /* device is suspended */
/* misc */
void *tmp_buffer; /* temporary buffer */
uint8_t ctlreg; /* cached contents of control reg */