[patch V2 28/31] genirq/msi: Mop up old interfaces

Thomas Gleixner
2021-12-06T22:52:55Z

Get rid of the old iterators, alloc/free functions and adjust the core code
accordingly.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
include/linux/msi.h | 15 ---------------
kernel/irq/msi.c | 31 +++++++++++++++----------------
2 files changed, 15 insertions(+), 31 deletions(-)

--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -214,15 +214,7 @@ struct msi_desc *msi_next_desc(struct de
for ((desc) = msi_first_desc((dev), (filter)); (desc); \
(desc) = msi_next_desc((dev), (filter)))

-/* Helpers to hide struct msi_desc implementation details */
#define msi_desc_to_dev(desc) ((desc)->dev)
-#define dev_to_msi_list(dev) (&(dev)->msi.data->list)
-#define first_msi_entry(dev) \
- list_first_entry(dev_to_msi_list((dev)), struct msi_desc, list)
-#define for_each_msi_entry(desc, dev) \
- list_for_each_entry((desc), dev_to_msi_list((dev)), list)
-#define for_each_msi_entry_safe(desc, tmp, dev) \
- list_for_each_entry_safe((desc), (tmp), dev_to_msi_list((dev)), list)

#ifdef CONFIG_IRQ_MSI_IOMMU
static inline const void *msi_desc_get_iommu_cookie(struct msi_desc *desc)
@@ -248,10 +240,6 @@ static inline void msi_desc_set_iommu_co
#endif

#ifdef CONFIG_PCI_MSI
-#define first_pci_msi_entry(pdev) first_msi_entry(&(pdev)->dev)
-#define for_each_pci_msi_entry(desc, pdev) \
- for_each_msi_entry((desc), &(pdev)->dev)
-
struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc);
void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);
#else /* CONFIG_PCI_MSI */
@@ -273,9 +261,6 @@ static inline void msi_free_msi_descs(st
msi_free_msi_descs_range(dev, MSI_DESC_ALL, 0, MSI_MAX_INDEX);
}

-struct msi_desc *alloc_msi_entry(struct device *dev, int nvec,
- const struct irq_affinity_desc *affinity);
-void free_msi_entry(struct msi_desc *entry);
void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);

--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -19,8 +19,10 @@

#include "internals.h"

+#define dev_to_msi_list(dev) (&(dev)->msi.data->list)
+
/**
- * alloc_msi_entry - Allocate an initialized msi_desc
+ * msi_alloc_desc - Allocate an initialized msi_desc
* @dev: Pointer to the device for which this is allocated
* @nvec: The number of vectors used in this entry
* @affinity: Optional pointer to an affinity mask array size of @nvec
@@ -30,12 +32,11 @@
*
* Return: pointer to allocated &msi_desc on success or %NULL on failure
*/
-struct msi_desc *alloc_msi_entry(struct device *dev, int nvec,
- const struct irq_affinity_desc *affinity)
+static struct msi_desc *msi_alloc_desc(struct device *dev, int nvec,
+ const struct irq_affinity_desc *affinity)
{
- struct msi_desc *desc;
+ struct msi_desc *desc = kzalloc(sizeof(*desc), GFP_KERNEL);

- desc = kzalloc(sizeof(*desc), GFP_KERNEL);
if (!desc)
return NULL;

@@ -43,21 +44,19 @@ struct msi_desc *alloc_msi_entry(struct
desc->dev = dev;
desc->nvec_used = nvec;
if (affinity) {
- desc->affinity = kmemdup(affinity,
- nvec * sizeof(*desc->affinity), GFP_KERNEL);
+ desc->affinity = kmemdup(affinity, nvec * sizeof(*desc->affinity), GFP_KERNEL);
if (!desc->affinity) {
kfree(desc);
return NULL;
}
}
-
return desc;
}

-void free_msi_entry(struct msi_desc *entry)
+static void msi_free_desc(struct msi_desc *desc)
{
- kfree(entry->affinity);
- kfree(entry);
+ kfree(desc->affinity);
+ kfree(desc);
}

/**
@@ -73,7 +72,7 @@ int msi_add_msi_desc(struct device *dev,

lockdep_assert_held(&dev->msi.data->mutex);

- desc = alloc_msi_entry(dev, init_desc->nvec_used, init_desc->affinity);
+ desc = msi_alloc_desc(dev, init_desc->nvec_used, init_desc->affinity);
if (!desc)
return -ENOMEM;

@@ -102,7 +101,7 @@ static int msi_add_simple_msi_descs(stru
lockdep_assert_held(&dev->msi.data->mutex);

for (i = 0; i < ndesc; i++) {
- desc = alloc_msi_entry(dev, 1, NULL);
+ desc = msi_alloc_desc(dev, 1, NULL);
if (!desc)
goto fail;
desc->msi_index = index + i;
@@ -114,7 +113,7 @@ static int msi_add_simple_msi_descs(stru
fail:
list_for_each_entry_safe(desc, tmp, &list, list) {
list_del(&desc->list);
- free_msi_entry(desc);
+ msi_free_desc(desc);
}
return -ENOMEM;
}
@@ -141,7 +140,7 @@ void msi_free_msi_descs_range(struct dev
if (desc->msi_index < first_index || desc->msi_index > last_index)
continue;
list_del(&desc->list);
- free_msi_entry(desc);
+ msi_free_desc(desc);
}
}

@@ -762,7 +761,7 @@ int msi_domain_populate_irqs(struct irq_

msi_lock_descs(dev);
for (virq = virq_base; virq < virq_base + nvec; virq++) {
- desc = alloc_msi_entry(dev, 1, NULL);
+ desc = msi_alloc_desc(dev, 1, NULL);
if (!desc) {
ret = -ENOMEM;
goto fail;