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Commit 02adac60 authored by Li Yang's avatar Li Yang Committed by Kumar Gala
Browse files

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: default avatarZhao Chenhui <b26998@freescale.com>
Signed-off-by: default avatarLi Yang <leoli@freescale.com>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent 80818813

arch/powerpc/sysdev/fsl_msi.c

+27 −6
Original line number Diff line number Diff line
@@ -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 @@ static int fsl_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) 
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);

		}

	}