pci: Cleanup the irq_desc mess in msi

Handing down irq_desc to msi just so that msi can access
irq_desc.irq_data.msi_desc is a pretty stupid idea. The calling code
can hand down a pointer to msi_desc so msi code does not need to know
about the irq descriptor at all.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index b79938f..74bb027 100644 (file)
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3383,14 +3383,14 @@ static int set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
 
        cfg = desc->chip_data;
 
-       get_cached_msi_msg_desc(desc, &msg);
+       __get_cached_msi_msg(desc->irq_data.msi_desc, &msg);
 
        msg.data &= ~MSI_DATA_VECTOR_MASK;
        msg.data |= MSI_DATA_VECTOR(cfg->vector);
        msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
        msg.address_lo |= MSI_ADDR_DEST_ID(dest);
 
-       write_msi_msg_desc(desc, &msg);
+       __write_msi_msg(desc->irq_data.msi_desc, &msg);
 
        return 0;
 }

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 55e0f93..5fcf5ae 100644 (file)
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -193,10 +193,8 @@ void unmask_msi_irq(struct irq_data *data)
        msi_set_mask_bit(data, 0);
 }
 
-void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
+void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 {
-       struct msi_desc *entry = get_irq_desc_msi(desc);
-
        BUG_ON(entry->dev->current_state != PCI_D0);
 
        if (entry->msi_attrib.is_msix) {
@@ -227,15 +225,13 @@ void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
 
 void read_msi_msg(unsigned int irq, struct msi_msg *msg)
 {
-       struct irq_desc *desc = irq_to_desc(irq);
+       struct msi_desc *entry = get_irq_msi(irq);
 
-       read_msi_msg_desc(desc, msg);
+       __read_msi_msg(entry, msg);
 }
 
-void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
+void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 {
-       struct msi_desc *entry = get_irq_desc_msi(desc);
-
        /* Assert that the cache is valid, assuming that
         * valid messages are not all-zeroes. */
        BUG_ON(!(entry->msg.address_hi | entry->msg.address_lo |
@@ -246,15 +242,13 @@ void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
 
 void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg)
 {
-       struct irq_desc *desc = irq_to_desc(irq);
+       struct msi_desc *entry = get_irq_msi(irq);
 
-       get_cached_msi_msg_desc(desc, msg);
+       __get_cached_msi_msg(entry, msg);
 }
 
-void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
+void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 {
-       struct msi_desc *entry = get_irq_desc_msi(desc);
-
        if (entry->dev->current_state != PCI_D0) {
                /* Don't touch the hardware now */
        } else if (entry->msi_attrib.is_msix) {
@@ -292,9 +286,9 @@ void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
 
 void write_msi_msg(unsigned int irq, struct msi_msg *msg)
 {
-       struct irq_desc *desc = irq_to_desc(irq);
+       struct msi_desc *entry = get_irq_msi(irq);
 
-       write_msi_msg_desc(desc, msg);
+       __write_msi_msg(entry, msg);
 }
 
 static void free_msi_irqs(struct pci_dev *dev)

diff --git a/include/linux/msi.h b/include/linux/msi.h
index 329d17c..05acced 100644 (file)
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -10,13 +10,13 @@ struct msi_msg {
 };
 
 /* Helper functions */
-struct irq_desc;
 struct irq_data;
+struct msi_desc;
 extern void mask_msi_irq(struct irq_data *data);
 extern void unmask_msi_irq(struct irq_data *data);
-extern void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
-extern void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
-extern void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);
+extern void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
+extern void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
+extern void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
 extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);
 extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
 extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);