diff mbox

[v2,09/22] ACPI: Fix a bug in parsing ACPI Memroy24 resource

Message ID 1422442660-455-10-git-send-email-jiang.liu@linux.intel.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Jiang Liu Jan. 28, 2015, 10:57 a.m. UTC
According to ACPI spec 5, section 6.4.3.1 "24-Bit Memory Range Descriptor",
minimum, maximum and address_length field in struct acpi_resource_memory24
is in granularity of 256-bytes. So shift 8-bit left to get correct address.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 drivers/acpi/resource.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Bjorn Helgaas Jan. 28, 2015, 11:15 p.m. UTC | #1
"Memory24", not "Memroy24", in subject.

On Wed, Jan 28, 2015 at 06:57:27PM +0800, Jiang Liu wrote:
> According to ACPI spec 5, section 6.4.3.1 "24-Bit Memory Range Descriptor",
> minimum, maximum and address_length field in struct acpi_resource_memory24
> is in granularity of 256-bytes. So shift 8-bit left to get correct address.
> 
> Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
> ---
>  drivers/acpi/resource.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
> index 7ce00a63f695..5544c6d26f32 100644
> --- a/drivers/acpi/resource.c
> +++ b/drivers/acpi/resource.c
> @@ -90,8 +90,8 @@ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
>  	switch (ares->type) {
>  	case ACPI_RESOURCE_TYPE_MEMORY24:
>  		memory24 = &ares->data.memory24;
> -		acpi_dev_get_memresource(res, memory24->minimum,
> -					 memory24->address_length,
> +		acpi_dev_get_memresource(res, memory24->minimum << 8,
> +					 memory24->address_length << 8,
>  					 memory24->write_protect);
>  		break;
>  	case ACPI_RESOURCE_TYPE_MEMORY32:
> -- 
> 1.7.10.4
> 
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diff mbox

Patch

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 7ce00a63f695..5544c6d26f32 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -90,8 +90,8 @@  bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
 	switch (ares->type) {
 	case ACPI_RESOURCE_TYPE_MEMORY24:
 		memory24 = &ares->data.memory24;
-		acpi_dev_get_memresource(res, memory24->minimum,
-					 memory24->address_length,
+		acpi_dev_get_memresource(res, memory24->minimum << 8,
+					 memory24->address_length << 8,
 					 memory24->write_protect);
 		break;
 	case ACPI_RESOURCE_TYPE_MEMORY32: