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powerpc/fsl_msi: fix the conflict of virt_msir's chip_data 

In fsl_of_msi_probe(), the virt_msir's chip_data have been stored
the pointer to struct mpic. We add a struct fsl_msi_cascade_data
to store the pointer to struct fsl_msi and msir_index in hanler_data.
Otherwise, the pointer to struct mpic will be over-written, and will
cause problem when calling eoi() of the irq.

Signed-off-by: Zhao Chenhui <b26998@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Li Yang 2010-04-22 16:31:35 +08:00 committed by Kumar Gala
parent 8081881327
commit 02adac6051
1 changed files with 27 additions and 6 deletions
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33
arch/powerpc/sysdev/fsl_msi.c
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@ -22,6 +22,7 @@
#include <asm/prom.h>
#include <asm/hw_irq.h>
#include <asm/ppc-pci.h>
#include <asm/mpic.h>
#include "fsl_msi.h"
struct fsl_msi_feature {
@ -29,6 +30,10 @@ struct fsl_msi_feature {
u32 msiir_offset;
};
struct fsl_msi_cascade_data {
struct fsl_msi *msi_data;
int index;
};
static inline u32 fsl_msi_read(u32 __iomem *base, unsigned int reg)
{
@ -102,7 +107,7 @@ static void fsl_teardown_msi_irqs(struct pci_dev *pdev)
list_for_each_entry(entry, &pdev->msi_list, list) {
if (entry->irq == NO_IRQ)
continue;
msi_data = get_irq_chip_data(entry->irq);
msi_data = get_irq_data(entry->irq);
set_irq_msi(entry->irq, NULL);
msi_bitmap_free_hwirqs(&msi_data->bitmap,
virq_to_hw(entry->irq), 1);
@ -133,7 +138,7 @@ static void fsl_compose_msi_msg(struct pci_dev *pdev, int hwirq,
static int fsl_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
{
int rc, hwirq;
int rc, hwirq = NO_IRQ;
unsigned int virq;
struct msi_desc *entry;
struct msi_msg msg;
@ -159,6 +164,7 @@ static int fsl_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
rc = -ENOSPC;
goto out_free;
}
set_irq_data(virq, msi_data);
set_irq_msi(virq, entry);
fsl_compose_msi_msg(pdev, hwirq, &msg, msi_data);
@ -173,11 +179,15 @@ out_free:
static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc)
{
unsigned int cascade_irq;
struct fsl_msi *msi_data = get_irq_chip_data(irq);
struct fsl_msi *msi_data;
int msir_index = -1;
u32 msir_value = 0;
u32 intr_index;
u32 have_shift = 0;
struct fsl_msi_cascade_data *cascade_data;
cascade_data = (struct fsl_msi_cascade_data *)get_irq_data(irq);
msi_data = cascade_data->msi_data;
raw_spin_lock(&desc->lock);
if ((msi_data->feature & FSL_PIC_IP_MASK) == FSL_PIC_IP_IPIC) {
@ -192,7 +202,7 @@ static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc)
if (unlikely(desc->status & IRQ_INPROGRESS))
goto unlock;
msir_index = (int)desc->handler_data;
msir_index = cascade_data->index;
if (msir_index >= NR_MSI_REG)
cascade_irq = NO_IRQ;
@ -244,6 +254,7 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
int virt_msir;
const u32 *p;
struct fsl_msi_feature *features = match->data;
struct fsl_msi_cascade_data *cascade_data = NULL;
printk(KERN_DEBUG "Setting up Freescale MSI support\n");
@ -310,9 +321,19 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
break;
virt_msir = irq_of_parse_and_map(dev->node, i);
if (virt_msir != NO_IRQ) {
set_irq_data(virt_msir, (void *)i);
cascade_data = kzalloc(
sizeof(struct fsl_msi_cascade_data),
GFP_KERNEL);
if (!cascade_data) {
dev_err(&dev->dev,
"No memory for MSI cascade data\n");
err = -ENOMEM;
goto error_out;
}
cascade_data->index = i;
cascade_data->msi_data = msi;
set_irq_data(virt_msir, (void *)cascade_data);
set_irq_chained_handler(virt_msir, fsl_msi_cascade);
set_irq_chip_data(virt_msir, msi);
}
}