| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 18 Mar 2010 12:26:38 -0700
From: Venkatesh Pallipadi <venki@...gle.com>
To: Bjorn Helgaas <bjorn.helgaas@...com>
Cc: Clemens Ladisch <clemens@...isch.de>,
Vojtech Pavlik <vojtech@...e.cz>, linux-kernel@...r.kernel.org,
linux-acpi@...r.kernel.org
Subject: Re: [PATCH v2 1/4] hpet: convert from ACPI to PNP driver
Acked-by: Venkatesh Pallipadi <venki@...gle.com>
On Thu, Mar 18, 2010 at 10:59 AM, Bjorn Helgaas <bjorn.helgaas@...com> wrote:
>
> PNPACPI already parses _CRS, and does a more complete job than we did here,
> so let's just take advantage of that.
>
> Signed-off-by: Bjorn Helgaas <bjorn.helgaas@...com>
> ---
>
> drivers/char/hpet.c | 109 +++++++++++++++------------------------------------
> 1 files changed, 33 insertions(+), 76 deletions(-)
>
>
> diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
> index e481c59..5cb05ed 100644
> --- a/drivers/char/hpet.c
> +++ b/drivers/char/hpet.c
> @@ -31,6 +31,7 @@
> #include <linux/seq_file.h>
> #include <linux/bitops.h>
> #include <linux/clocksource.h>
> +#include <linux/pnp.h>
>
> #include <asm/current.h>
> #include <asm/uaccess.h>
> @@ -40,7 +41,6 @@
> #include <asm/div64.h>
>
> #include <linux/acpi.h>
> -#include <acpi/acpi_bus.h>
> #include <linux/hpet.h>
>
> /*
> @@ -899,101 +899,56 @@ int hpet_alloc(struct hpet_data *hdp)
> return 0;
> }
>
> -static acpi_status hpet_resources(struct acpi_resource *res, void *data)
> +#ifdef CONFIG_PNP
> +static int hpet_pnp_add(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
> {
> - struct hpet_data *hdp;
> - acpi_status status;
> - struct acpi_resource_address64 addr;
> -
> - hdp = data;
> -
> - status = acpi_resource_to_address64(res, &addr);
> -
> - if (ACPI_SUCCESS(status)) {
> - hdp->hd_phys_address = addr.minimum;
> - hdp->hd_address = ioremap(addr.minimum, addr.address_length);
> -
> - if (hpet_is_known(hdp)) {
> - iounmap(hdp->hd_address);
> - return AE_ALREADY_EXISTS;
> - }
> - } else if (res->type == ACPI_RESOURCE_TYPE_FIXED_MEMORY32) {
> - struct acpi_resource_fixed_memory32 *fixmem32;
> -
> - fixmem32 = &res->data.fixed_memory32;
> - if (!fixmem32)
> - return AE_NO_MEMORY;
> -
> - hdp->hd_phys_address = fixmem32->address;
> - hdp->hd_address = ioremap(fixmem32->address,
> - HPET_RANGE_SIZE);
> -
> - if (hpet_is_known(hdp)) {
> - iounmap(hdp->hd_address);
> - return AE_ALREADY_EXISTS;
> - }
> - } else if (res->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
> - struct acpi_resource_extended_irq *irqp;
> - int i, irq;
> -
> - irqp = &res->data.extended_irq;
> -
> - for (i = 0; i < irqp->interrupt_count; i++) {
> - irq = acpi_register_gsi(NULL, irqp->interrupts[i],
> - irqp->triggering, irqp->polarity);
> - if (irq < 0)
> - return AE_ERROR;
> -
> - hdp->hd_irq[hdp->hd_nirqs] = irq;
> - hdp->hd_nirqs++;
> - }
> - }
> -
> - return AE_OK;
> -}
> -
> -static int hpet_acpi_add(struct acpi_device *device)
> -{
> - acpi_status result;
> struct hpet_data data;
> + struct resource *mem, *irq;
> + int i;
>
> memset(&data, 0, sizeof(data));
>
> - result =
> - acpi_walk_resources(device->handle, METHOD_NAME__CRS,
> - hpet_resources, &data);
> -
> - if (ACPI_FAILURE(result))
> + mem = pnp_get_resource(dev, IORESOURCE_MEM, 0);
> + if (!mem)
> return -ENODEV;
>
> - if (!data.hd_address || !data.hd_nirqs) {
> - printk("%s: no address or irqs in _CRS\n", __func__);
> + data.hd_phys_address = mem->start;
> +
> + if (hpet_is_known(&data))
> return -ENODEV;
> +
> + i = 0;
> + while (data.hd_nirqs < ARRAY_SIZE(data.hd_irq)) {
> + irq = pnp_get_resource(dev, IORESOURCE_IRQ, i++);
> + if (pnp_resource_valid(irq) && pnp_resource_enabled(irq))
> + data.hd_irq[data.hd_nirqs++] = irq->start;
> }
> + if (!data.hd_nirqs)
> + return -ENODEV;
> +
> + data.hd_address = ioremap(mem->start, resource_size(mem));
>
> return hpet_alloc(&data);
> }
>
> -static int hpet_acpi_remove(struct acpi_device *device, int type)
> +static void hpet_pnp_remove(struct pnp_dev *dev)
> {
> /* XXX need to unregister clocksource, dealloc mem, etc */
> - return -EINVAL;
> }
>
> -static const struct acpi_device_id hpet_device_ids[] = {
> +static const struct pnp_device_id hpet_device_ids[] = {
> {"PNP0103", 0},
> {"", 0},
> };
> MODULE_DEVICE_TABLE(acpi, hpet_device_ids);
>
> -static struct acpi_driver hpet_acpi_driver = {
> +static struct pnp_driver hpet_pnp_driver = {
> .name = "hpet",
> - .ids = hpet_device_ids,
> - .ops = {
> - .add = hpet_acpi_add,
> - .remove = hpet_acpi_remove,
> - },
> + .id_table = hpet_device_ids,
> + .probe = hpet_pnp_add,
> + .remove = hpet_pnp_remove,
> };
> +#endif
>
> static struct miscdevice hpet_misc = { HPET_MINOR, "hpet", &hpet_fops };
>
> @@ -1007,26 +962,28 @@ static int __init hpet_init(void)
>
> sysctl_header = register_sysctl_table(dev_root);
>
> - result = acpi_bus_register_driver(&hpet_acpi_driver);
> +#ifdef CONFIG_PNP
> + result = pnp_register_driver(&hpet_pnp_driver);
> if (result < 0) {
> if (sysctl_header)
> unregister_sysctl_table(sysctl_header);
> misc_deregister(&hpet_misc);
> return result;
> }
> +#endif
>
> return 0;
> }
>
> static void __exit hpet_exit(void)
> {
> - acpi_bus_unregister_driver(&hpet_acpi_driver);
> +#ifdef CONFIG_PNP
> + pnp_unregister_driver(&hpet_pnp_driver);
> +#endif
>
> if (sysctl_header)
> unregister_sysctl_table(sysctl_header);
> misc_deregister(&hpet_misc);
> -
> - return;
> }
>
> module_init(hpet_init);
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists