| Message ID | 1390448559-33896-1-git-send-email-wangyijing@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Wed, Jan 22, 2014 at 8:42 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. Also > add some detailed debug info when acpi_evaluate_object() failed. > > Reviewed-by: Jani Nikula <jani.nikula@intel.com> > Acked-by: Bjorn Helgaas <bhelgaas@google.com> > Signed-off-by: Yijing Wang <wangyijing@huawei.com> > --- > v4->v5: Add some detailed debug info for acpi_evaluate_object() > failure suggested by Bjorn. > 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 | 33 ++++++++++++++++------- > drivers/gpu/drm/nouveau/core/subdev/mxm/base.c | 13 ++++++--- > drivers/gpu/drm/nouveau/nouveau_acpi.c | 25 +++++++++++------- > drivers/pci/pci-label.c | 10 +++++-- > 4 files changed, 54 insertions(+), 27 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c > index dfff090..e7b526b 100644 > --- a/drivers/gpu/drm/i915/intel_acpi.c > +++ b/drivers/gpu/drm/i915/intel_acpi.c > @@ -31,11 +31,13 @@ static const u8 intel_dsm_guid[] = { > static int intel_dsm(acpi_handle handle, int func) > { > struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; > + struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; > struct acpi_object_list input; > 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 +52,14 @@ 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)) { > + acpi_get_name(handle, ACPI_FULL_PATHNAME, &string); > + DRM_DEBUG_DRIVER( > + "failed to evaluate _DSM for %s, exit status %u\n", > + (char *)string.pointer, (unsigned int)status); > + kfree(string.pointer); > + return -EINVAL; I said "too bad there isn't an *easy* way" to include more information. IMHO this is too ugly and error-prone to use consistently. And if you are going to add more information, why did you only do it for some of the calls and not others? I considered adding a %p extension to print the pathname; I don't know if that's worthwhile or not. I think it would be ideal if we had a struct device and could use dev_info(), and then a way to connect the struct device with an ACPI path, like maybe a dmesg note when we create the struct device corresponding to an ACPI Device node. Bjorn > } > > obj = (union acpi_object *)output.pointer; > @@ -138,10 +144,12 @@ static char *intel_dsm_mux_type(u8 type) > static void intel_dsm_platform_mux_info(void) > { > struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; > + struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; > 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 +164,15 @@ 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)) { > + acpi_get_name(intel_dsm_priv.dhandle, > + ACPI_FULL_PATHNAME, &string); > + DRM_DEBUG_DRIVER( > + "failed to evaluate _DSM for %s, exit status %u\n", > + (char *)string.pointer, (unsigned int)status); > + kfree(string.pointer); > 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..c30ee88 100644 > --- a/drivers/gpu/drm/nouveau/core/subdev/mxm/base.c > +++ b/drivers/gpu/drm/nouveau/core/subdev/mxm/base.c > @@ -112,17 +112,22 @@ mxm_shadow_dsm(struct nouveau_mxm *mxm, u8 version) > }; > struct acpi_object_list list = { ARRAY_SIZE(args), args }; > struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL }; > + struct acpi_buffer string = { 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)) { > + acpi_get_name(handle, ACPI_FULL_PATHNAME, &string); > + nv_debug(mxm, "DSM MXMS failed for %s: exit status %u\n", > + (char *)string.pointer, > + (unsigned int)status); > + kfree(string.pointer); > return false; > } > > diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c > index ba0183f..53d24a7 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 +102,12 @@ 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)) { > + acpi_handle_info(handle, > + "failed to evaluate _DSM, exit status %u\n", > + (unsigned int)status); > + return -EINVAL; > } > > obj = (union acpi_object *)output.pointer; > @@ -134,7 +137,7 @@ 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 +151,12 @@ 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)) { > + acpi_handle_info(handle, > + "failed to evaluate _DSM, exit status %u\n", > + (unsigned int)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..0216094 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 +228,13 @@ 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)) { > + acpi_handle_info(handle, > + "failed to evaluate _DSM, exit status %u\n", > + (unsigned int)status); > return -1; > + } > > obj = (union acpi_object *)output->pointer; > > -- > 1.7.1 > > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c index dfff090..e7b526b 100644 --- a/drivers/gpu/drm/i915/intel_acpi.c +++ b/drivers/gpu/drm/i915/intel_acpi.c @@ -31,11 +31,13 @@ static const u8 intel_dsm_guid[] = { static int intel_dsm(acpi_handle handle, int func) { struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; struct acpi_object_list input; 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 +52,14 @@ 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)) { + acpi_get_name(handle, ACPI_FULL_PATHNAME, &string); + DRM_DEBUG_DRIVER( + "failed to evaluate _DSM for %s, exit status %u\n", + (char *)string.pointer, (unsigned int)status); + kfree(string.pointer); + return -EINVAL; } obj = (union acpi_object *)output.pointer; @@ -138,10 +144,12 @@ static char *intel_dsm_mux_type(u8 type) static void intel_dsm_platform_mux_info(void) { struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; 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 +164,15 @@ 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)) { + acpi_get_name(intel_dsm_priv.dhandle, + ACPI_FULL_PATHNAME, &string); + DRM_DEBUG_DRIVER( + "failed to evaluate _DSM for %s, exit status %u\n", + (char *)string.pointer, (unsigned int)status); + kfree(string.pointer); 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..c30ee88 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/mxm/base.c +++ b/drivers/gpu/drm/nouveau/core/subdev/mxm/base.c @@ -112,17 +112,22 @@ mxm_shadow_dsm(struct nouveau_mxm *mxm, u8 version) }; struct acpi_object_list list = { ARRAY_SIZE(args), args }; struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_buffer string = { 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)) { + acpi_get_name(handle, ACPI_FULL_PATHNAME, &string); + nv_debug(mxm, "DSM MXMS failed for %s: exit status %u\n", + (char *)string.pointer, + (unsigned int)status); + kfree(string.pointer); return false; } diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c index ba0183f..53d24a7 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 +102,12 @@ 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)) { + acpi_handle_info(handle, + "failed to evaluate _DSM, exit status %u\n", + (unsigned int)status); + return -EINVAL; } obj = (union acpi_object *)output.pointer; @@ -134,7 +137,7 @@ 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 +151,12 @@ 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)) { + acpi_handle_info(handle, + "failed to evaluate _DSM, exit status %u\n", + (unsigned int)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..0216094 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 +228,13 @@ 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)) { + acpi_handle_info(handle, + "failed to evaluate _DSM, exit status %u\n", + (unsigned int)status); return -1; + } obj = (union acpi_object *)output->pointer;