powerpc/fsl_msi: add removal path and probe failing path

Also cleanup the probe function.

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 31 insertions, 6 deletions

diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
index 1ab703915972..f7ca9e6fa5f0 100644
--- a/arch/powerpc/sysdev/fsl_msi.c
+++ b/arch/powerpc/sysdev/fsl_msi.c
@@ -250,6 +250,30 @@ unlock:
         raw_spin_unlock(&desc->lock);
 }
 
+static int fsl_of_msi_remove(struct of_device *ofdev)
+{
+        struct fsl_msi *msi = ofdev->dev.platform_data;
+        int virq, i;
+        struct fsl_msi_cascade_data *cascade_data;
+
+        if (msi->list.prev != NULL)
+                list_del(&msi->list);
+        for (i = 0; i < NR_MSI_REG; i++) {
+                virq = msi->msi_virqs[i];
+                if (virq != NO_IRQ) {
+                        cascade_data = get_irq_data(virq);
+                        kfree(cascade_data);
+                        irq_dispose_mapping(virq);
+                }
+        }
+        if (msi->bitmap.bitmap)
+                msi_bitmap_free(&msi->bitmap);
+        iounmap(msi->msi_regs);
+        kfree(msi);
+
+        return 0;
+}
+
 static int __devinit fsl_of_msi_probe(struct of_device *dev,
                                 const struct of_device_id *match)
 {
@@ -269,9 +293,9 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
         msi = kzalloc(sizeof(struct fsl_msi), GFP_KERNEL);
         if (!msi) {
                 dev_err(&dev->dev, "No memory for MSI structure\n");
-                err = -ENOMEM;
-                goto error_out;
+                return -ENOMEM;
         }
+        dev->dev.platform_data = msi;
 
         msi->irqhost = irq_alloc_host(dev->node, IRQ_HOST_MAP_LINEAR,
                                       NR_MSI_IRQS, &fsl_msi_host_ops, 0);
@@ -328,9 +352,7 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
                 offset = *p / IRQS_PER_MSI_REG;
 
         count /= sizeof(u32);
-        for (i = 0; i < count / 2; i++) {
-                if (i > NR_MSI_REG)
-                        break;
+        for (i = 0; i < min(count / 2, NR_MSI_REG); i++) {
                 virt_msir = irq_of_parse_and_map(dev->node, i);
                 if (virt_msir != NO_IRQ) {
                         cascade_data = kzalloc(
@@ -342,6 +364,7 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
                                 err = -ENOMEM;
                                 goto error_out;
                         }
+                        msi->msi_virqs[i] = virt_msir;
                         cascade_data->index = i + offset;
                         cascade_data->msi_data = msi;
                         set_irq_data(virt_msir, (void *)cascade_data);
@@ -363,7 +386,7 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
         }
         return 0;
 error_out:
-        kfree(msi);
+        fsl_of_msi_remove(dev);
         return err;
 }
 
@@ -393,6 +416,7 @@ static struct of_platform_driver fsl_of_msi_driver = {
         .name = "fsl-msi",
         .match_table = fsl_of_msi_ids,
         .probe = fsl_of_msi_probe,
+        .remove = fsl_of_msi_remove,
 };
 
 static __init int fsl_of_msi_init(void)
diff --git a/arch/powerpc/sysdev/fsl_msi.h b/arch/powerpc/sysdev/fsl_msi.h
index 8fc5523d6ee3..624580c252d7 100644
--- a/arch/powerpc/sysdev/fsl_msi.h
+++ b/arch/powerpc/sysdev/fsl_msi.h
@@ -32,6 +32,7 @@ struct fsl_msi {
         u32 msi_addr_hi;
         void __iomem *msi_regs;
         u32 feature;
+        int msi_virqs[NR_MSI_REG];
 
         struct msi_bitmap bitmap;