[PATCH 11/26] cb710: Convert to new IDA API

From: Matthew Wilcox
Date: Thu Jun 21 2018 - 17:31:08 EST


Eliminates the custom spinlock and the call to ida_pre_get.

Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
---
drivers/misc/cb710/core.c | 23 +++++------------------
1 file changed, 5 insertions(+), 18 deletions(-)

diff --git a/drivers/misc/cb710/core.c b/drivers/misc/cb710/core.c
index 4d4acf763b65..2c43fd09d602 100644
--- a/drivers/misc/cb710/core.c
+++ b/drivers/misc/cb710/core.c
@@ -16,7 +16,6 @@
#include <linux/gfp.h>

static DEFINE_IDA(cb710_ida);
-static DEFINE_SPINLOCK(cb710_ida_lock);

void cb710_pci_update_config_reg(struct pci_dev *pdev,
int reg, uint32_t mask, uint32_t xor)
@@ -205,7 +204,6 @@ static int cb710_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct cb710_chip *chip;
- unsigned long flags;
u32 val;
int err;
int n = 0;
@@ -256,18 +254,10 @@ static int cb710_probe(struct pci_dev *pdev,
if (err)
return err;

- do {
- if (!ida_pre_get(&cb710_ida, GFP_KERNEL))
- return -ENOMEM;
-
- spin_lock_irqsave(&cb710_ida_lock, flags);
- err = ida_get_new(&cb710_ida, &chip->platform_id);
- spin_unlock_irqrestore(&cb710_ida_lock, flags);
-
- if (err && err != -EAGAIN)
- return err;
- } while (err);
-
+ err = ida_alloc(&cb710_ida, GFP_KERNEL);
+ if (err < 0)
+ return err;
+ chip->platform_id = err;

dev_info(&pdev->dev, "id %d, IO 0x%p, IRQ %d\n",
chip->platform_id, chip->iobase, pdev->irq);
@@ -308,7 +298,6 @@ static int cb710_probe(struct pci_dev *pdev,
static void cb710_remove_one(struct pci_dev *pdev)
{
struct cb710_chip *chip = pci_get_drvdata(pdev);
- unsigned long flags;

cb710_unregister_slot(chip, CB710_SLOT_SM);
cb710_unregister_slot(chip, CB710_SLOT_MS);
@@ -317,9 +306,7 @@ static void cb710_remove_one(struct pci_dev *pdev)
BUG_ON(atomic_read(&chip->slot_refs_count) != 0);
#endif

- spin_lock_irqsave(&cb710_ida_lock, flags);
- ida_remove(&cb710_ida, chip->platform_id);
- spin_unlock_irqrestore(&cb710_ida_lock, flags);
+ ida_free(&cb710_ida, chip->platform_id);
}

static const struct pci_device_id cb710_pci_tbl[] = {
--
2.17.1