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powerpc/axonram: Use only one block device major number

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Axonram module registers one block device for each DDR2 DIMM found
on a system. This means that each DDR2 DIMM becomes its own block device
major number. This patch lets axonram module to register the only one
block device for all DDR2 DIMMs which also spares kernel resources.

Signed-off-by: Maxim Shchetynin <maxim@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Maxim Shchetynin 2008-07-16 05:51:41 +10:00 committed by Benjamin Herrenschmidt
parent 18ad7a61e1
commit 9a23409b69
1 changed files with 15 additions and 8 deletions
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23
arch/powerpc/sysdev/axonram.c
View file

@ -57,6 +57,8 @@
#define AXON_RAM_SECTOR_SIZE 1 << AXON_RAM_SECTOR_SHIFT
#define AXON_RAM_IRQ_FLAGS IRQF_SHARED | IRQF_TRIGGER_RISING
static int azfs_major, azfs_minor;
struct axon_ram_bank {
struct of_device *device;
struct gendisk *disk;
@ -227,19 +229,14 @@ axon_ram_probe(struct of_device *device, const struct of_device_id *device_id)
goto failed;
}
bank->disk->first_minor = 0;
bank->disk->major = azfs_major;
bank->disk->first_minor = azfs_minor;
bank->disk->fops = &axon_ram_devops;
bank->disk->private_data = bank;
bank->disk->driverfs_dev = &device->dev;
sprintf(bank->disk->disk_name, "%s%d",
AXON_RAM_DEVICE_NAME, axon_ram_bank_id);
bank->disk->major = register_blkdev(0, bank->disk->disk_name);
if (bank->disk->major < 0) {
dev_err(&device->dev, "Cannot register block device\n");
rc = -EFAULT;
goto failed;
}
bank->disk->queue = blk_alloc_queue(GFP_KERNEL);
if (bank->disk->queue == NULL) {
@ -276,6 +273,8 @@ axon_ram_probe(struct of_device *device, const struct of_device_id *device_id)
goto failed;
}
azfs_minor += bank->disk->minors;
return 0;
failed:
@ -310,7 +309,6 @@ axon_ram_remove(struct of_device *device)
device_remove_file(&device->dev, &dev_attr_ecc);
free_irq(bank->irq_id, device);
unregister_blkdev(bank->disk->major, bank->disk->disk_name);
del_gendisk(bank->disk);
iounmap((void __iomem *) bank->io_addr);
kfree(bank);
@ -341,6 +339,14 @@ static struct of_platform_driver axon_ram_driver = {
static int __init
axon_ram_init(void)
{
azfs_major = register_blkdev(azfs_major, AXON_RAM_DEVICE_NAME);
if (azfs_major < 0) {
printk(KERN_ERR "%s cannot become block device major number\n",
AXON_RAM_MODULE_NAME);
return -EFAULT;
}
azfs_minor = 0;
return of_register_platform_driver(&axon_ram_driver);
}
@ -351,6 +357,7 @@ static void __exit
axon_ram_exit(void)
{
of_unregister_platform_driver(&axon_ram_driver);
unregister_blkdev(azfs_major, AXON_RAM_DEVICE_NAME);
}
module_init(axon_ram_init);