* [PATCH v4] ACPI: Fix acpi_evaluate_object() return value check
@ 2014-01-21 2:46 Yijing Wang
2014-01-22 21:37 ` Bjorn Helgaas
0 siblings, 1 reply; 3+ messages in thread
From: Yijing Wang @ 2014-01-21 2:46 UTC (permalink / raw)
To: Rafael J. Wysocki
Cc: linux-acpi, Daniel Vetter, Jani Nikula, David Airlie,
Bjorn Helgaas, intel-gfx, dri-devel, linux-kernel, linux-pci,
Greg Kroah-Hartman, Dave Airlie, Yijing Wang, Hanjun Guo
Since acpi_evaluate_object() returns acpi_status and not plain int,
ACPI_FAILURE() should be used for checking its return value.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
---
v3->v4: Fix spell error, add Jani Nikula reviewed-by.
v2->v3: Fix compile error pointed out by Hanjun.
v1->v2: Add CC to related subsystem MAINTAINERS
---
drivers/gpu/drm/i915/intel_acpi.c | 24 ++++++++++++++----------
drivers/gpu/drm/nouveau/core/subdev/mxm/base.c | 9 +++++----
drivers/gpu/drm/nouveau/nouveau_acpi.c | 23 +++++++++++++----------
drivers/pci/pci-label.c | 9 ++++++---
4 files changed, 38 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c
index dfff090..87e8f74 100644
--- a/drivers/gpu/drm/i915/intel_acpi.c
+++ b/drivers/gpu/drm/i915/intel_acpi.c
@@ -35,7 +35,8 @@ static int intel_dsm(acpi_handle handle, int func)
union acpi_object params[4];
union acpi_object *obj;
u32 result;
- int ret = 0;
+ acpi_status status;
+ int ret;
input.count = 4;
input.pointer = params;
@@ -50,10 +51,11 @@ static int intel_dsm(acpi_handle handle, int func)
params[3].package.count = 0;
params[3].package.elements = NULL;
- ret = acpi_evaluate_object(handle, "_DSM", &input, &output);
- if (ret) {
- DRM_DEBUG_DRIVER("failed to evaluate _DSM: %d\n", ret);
- return ret;
+ status = acpi_evaluate_object(handle, "_DSM", &input, &output);
+ if (ACPI_FAILURE(status)) {
+ DRM_DEBUG_DRIVER("failed to evaluate _DSM: %s\n",
+ acpi_format_exception(status));
+ return -EINVAL;
}
obj = (union acpi_object *)output.pointer;
@@ -141,7 +143,8 @@ static void intel_dsm_platform_mux_info(void)
struct acpi_object_list input;
union acpi_object params[4];
union acpi_object *pkg;
- int i, ret;
+ acpi_status status;
+ int i;
input.count = 4;
input.pointer = params;
@@ -156,10 +159,11 @@ static void intel_dsm_platform_mux_info(void)
params[3].package.count = 0;
params[3].package.elements = NULL;
- ret = acpi_evaluate_object(intel_dsm_priv.dhandle, "_DSM", &input,
- &output);
- if (ret) {
- DRM_DEBUG_DRIVER("failed to evaluate _DSM: %d\n", ret);
+ acpi_status = acpi_evaluate_object(intel_dsm_priv.dhandle,
+ "_DSM", &input, &output);
+ if (ACPI_FAILURE(status)) {
+ DRM_DEBUG_DRIVER("failed to evaluate _DSM: %s\n",
+ acpi_format_exception(status));
goto out;
}
diff --git a/drivers/gpu/drm/nouveau/core/subdev/mxm/base.c b/drivers/gpu/drm/nouveau/core/subdev/mxm/base.c
index 1291204..c5e7a2b 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/mxm/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/mxm/base.c
@@ -114,15 +114,16 @@ mxm_shadow_dsm(struct nouveau_mxm *mxm, u8 version)
struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
acpi_handle handle;
- int ret;
+ acpi_status status;
handle = ACPI_HANDLE(&device->pdev->dev);
if (!handle)
return false;
- ret = acpi_evaluate_object(handle, "_DSM", &list, &retn);
- if (ret) {
- nv_debug(mxm, "DSM MXMS failed: %d\n", ret);
+ status = acpi_evaluate_object(handle, "_DSM", &list, &retn);
+ if (ACPI_FAILURE(status)) {
+ nv_debug(mxm, "DSM MXMS failed: %s\n",
+ acpi_format_exception(status));
return false;
}
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index ba0183f..de3068b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -82,7 +82,8 @@ static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *
struct acpi_object_list input;
union acpi_object params[4];
union acpi_object *obj;
- int i, err;
+ acpi_status status;
+ int i;
char args_buff[4];
input.count = 4;
@@ -101,10 +102,11 @@ static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *
args_buff[i] = (arg >> i * 8) & 0xFF;
params[3].buffer.pointer = args_buff;
- err = acpi_evaluate_object(handle, "_DSM", &input, &output);
- if (err) {
- printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
- return err;
+ status = acpi_evaluate_object(handle, "_DSM", &input, &output);
+ if (ACPI_FAILURE(status)) {
+ pr_info("failed to evaluate _DSM: %s\n",
+ acpi_format_exception(status));
+ return -EINVAL;
}
obj = (union acpi_object *)output.pointer;
@@ -134,7 +136,7 @@ static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
struct acpi_object_list input;
union acpi_object params[4];
union acpi_object *obj;
- int err;
+ acpi_status status;
input.count = 4;
input.pointer = params;
@@ -148,10 +150,11 @@ static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
params[3].type = ACPI_TYPE_INTEGER;
params[3].integer.value = arg;
- err = acpi_evaluate_object(handle, "_DSM", &input, &output);
- if (err) {
- printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
- return err;
+ status = acpi_evaluate_object(handle, "_DSM", &input, &output);
+ if (ACPI_FAILURE(status)) {
+ pr_info("failed to evaluate _DSM: %s\n",
+ acpi_format_exception(status));
+ return -EINVAL;
}
obj = (union acpi_object *)output.pointer;
diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index d51f45a..7ba4de6 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -213,7 +213,7 @@ dsm_get_label(acpi_handle handle, int func,
union acpi_object *obj;
int len = 0;
- int err;
+ acpi_status status;
input.count = 4;
input.pointer = params;
@@ -228,9 +228,12 @@ dsm_get_label(acpi_handle handle, int func,
params[3].package.count = 0;
params[3].package.elements = NULL;
- err = acpi_evaluate_object(handle, "_DSM", &input, output);
- if (err)
+ status = acpi_evaluate_object(handle, "_DSM", &input, output);
+ if (ACPI_FAILURE(status)) {
+ pr_info("failed to evaluate _DSM: %s\n",
+ acpi_format_exception(status));
return -1;
+ }
obj = (union acpi_object *)output->pointer;
--
1.7.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v4] ACPI: Fix acpi_evaluate_object() return value check
2014-01-21 2:46 [PATCH v4] ACPI: Fix acpi_evaluate_object() return value check Yijing Wang
@ 2014-01-22 21:37 ` Bjorn Helgaas
2014-01-23 2:19 ` Yijing Wang
0 siblings, 1 reply; 3+ messages in thread
From: Bjorn Helgaas @ 2014-01-22 21:37 UTC (permalink / raw)
To: Yijing Wang
Cc: Rafael J. Wysocki, linux-acpi@vger.kernel.org, Daniel Vetter,
Jani Nikula, David Airlie, intel-gfx, DRI mailing list,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
Greg Kroah-Hartman, Dave Airlie, Hanjun Guo
On Mon, Jan 20, 2014 at 7:46 PM, Yijing Wang <wangyijing@huawei.com> wrote:
> Since acpi_evaluate_object() returns acpi_status and not plain int,
> ACPI_FAILURE() should be used for checking its return value.
>
> Reviewed-by: Jani Nikula <jani.nikula@intel.com>
> Signed-off-by: Yijing Wang <wangyijing@huawei.com>
> ---
> v3->v4: Fix spell error, add Jani Nikula reviewed-by.
> v2->v3: Fix compile error pointed out by Hanjun.
> v1->v2: Add CC to related subsystem MAINTAINERS
> ---
> drivers/gpu/drm/i915/intel_acpi.c | 24 ++++++++++++++----------
> drivers/gpu/drm/nouveau/core/subdev/mxm/base.c | 9 +++++----
> drivers/gpu/drm/nouveau/nouveau_acpi.c | 23 +++++++++++++----------
> drivers/pci/pci-label.c | 9 ++++++---
For the drivers/pci/pci-label.c part,
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
> + status = acpi_evaluate_object(handle, "_DSM", &input, &output);
> + if (ACPI_FAILURE(status)) {
> + DRM_DEBUG_DRIVER("failed to evaluate _DSM: %s\n",
> + acpi_format_exception(status));
It's too bad there isn't an easy way to produce more informative error
messages, e.g., by including a namespace path or something. A message
like:
failed to evaluate _DSM: A requested entity is not found
is only useful if there's enough context to figure out what's going on.
Bjorn
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v4] ACPI: Fix acpi_evaluate_object() return value check
2014-01-22 21:37 ` Bjorn Helgaas
@ 2014-01-23 2:19 ` Yijing Wang
0 siblings, 0 replies; 3+ messages in thread
From: Yijing Wang @ 2014-01-23 2:19 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Greg Kroah-Hartman, David Airlie, Daniel Vetter, intel-gfx,
Rafael J. Wysocki, Hanjun Guo, linux-kernel@vger.kernel.org,
linux-acpi@vger.kernel.org, DRI mailing list,
linux-pci@vger.kernel.org, Dave Airlie
On 2014/1/23 5:37, Bjorn Helgaas wrote:
> On Mon, Jan 20, 2014 at 7:46 PM, Yijing Wang <wangyijing@huawei.com> wrote:
>> Since acpi_evaluate_object() returns acpi_status and not plain int,
>> ACPI_FAILURE() should be used for checking its return value.
>>
>> Reviewed-by: Jani Nikula <jani.nikula@intel.com>
>> Signed-off-by: Yijing Wang <wangyijing@huawei.com>
>> ---
>> v3->v4: Fix spell error, add Jani Nikula reviewed-by.
>> v2->v3: Fix compile error pointed out by Hanjun.
>> v1->v2: Add CC to related subsystem MAINTAINERS
>> ---
>> drivers/gpu/drm/i915/intel_acpi.c | 24 ++++++++++++++----------
>> drivers/gpu/drm/nouveau/core/subdev/mxm/base.c | 9 +++++----
>> drivers/gpu/drm/nouveau/nouveau_acpi.c | 23 +++++++++++++----------
>> drivers/pci/pci-label.c | 9 ++++++---
>
> For the drivers/pci/pci-label.c part,
>
> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Thanks.
>
>> + status = acpi_evaluate_object(handle, "_DSM", &input, &output);
>> + if (ACPI_FAILURE(status)) {
>> + DRM_DEBUG_DRIVER("failed to evaluate _DSM: %s\n",
>> + acpi_format_exception(status));
>
> It's too bad there isn't an easy way to produce more informative error
> messages, e.g., by including a namespace path or something. A message
> like:
>
> failed to evaluate _DSM: A requested entity is not found
>
> is only useful if there's enough context to figure out what's going on.
Yes, I will add the namespace path into the debug info, thanks!
>
> Bjorn
>
> .
>
--
Thanks!
Yijing
^ permalink raw reply [flat|nested] 3+ messages in thread
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