Please file a bugzilla on this at: https://bugs.acpica.org/
thanks. Bob > -----Original Message----- > From: Hanjun Guo [mailto:hanjun....@linaro.org] > Sent: Friday, January 24, 2014 8:20 AM > To: Zheng, Lv; Moore, Robert > Cc: Rafael J. Wysocki; linux-a...@vger.kernel.org; de...@acpica.org; > patc...@linaro.org; linux-kernel@vger.kernel.org; linaro- > a...@lists.linaro.org; Hanjun Guo > Subject: [PATCH 1/2] ACPI / ACPICA: refactor acpi_evaluate_object() to > reduce nesting if > > acpi_evaluate_object() has nesting if judgement to make code a little bit > complicated, refactor it to make things simple. > > Signed-off-by: Hanjun Guo <hanjun....@linaro.org> > --- > drivers/acpi/acpica/nsxfeval.c | 104 +++++++++++++++++++---------------- > ----- > 1 file changed, 50 insertions(+), 54 deletions(-) > > diff --git a/drivers/acpi/acpica/nsxfeval.c > b/drivers/acpi/acpica/nsxfeval.c index 1f0c28b..a1b0b88 100644 > --- a/drivers/acpi/acpica/nsxfeval.c > +++ b/drivers/acpi/acpica/nsxfeval.c > @@ -370,68 +370,64 @@ acpi_evaluate_object(acpi_handle handle, > * If we are expecting a return value, and all went well above, > * copy the return value to an external object. > */ > - if (return_buffer) { > - if (!info->return_object) { > - return_buffer->length = 0; > - } else { > - if (ACPI_GET_DESCRIPTOR_TYPE(info->return_object) == > - ACPI_DESC_TYPE_NAMED) { > - /* > - * If we received a NS Node as a return object, > this means that > - * the object we are evaluating has nothing > interesting to > - * return (such as a mutex, etc.) We return an > error because > - * these types are essentially unsupported by > this > interface. > - * We don't check up front because this makes it > easier to add > - * support for various types at a later date if > necessary. > - */ > - status = AE_TYPE; > - info->return_object = NULL; /* No need to > delete > a NS Node */ > - return_buffer->length = 0; > - } > + if (!return_buffer) > + goto out; > > - if (ACPI_SUCCESS(status)) { > + if (!info->return_object) { > + return_buffer->length = 0; > + goto out; > + } > > - /* Dereference Index and ref_of references */ > + if (ACPI_GET_DESCRIPTOR_TYPE(info->return_object) == > + ACPI_DESC_TYPE_NAMED) { > + /* > + * If we received a NS Node as a return object, this means > that > + * the object we are evaluating has nothing interesting to > + * return (such as a mutex, etc.) We return an error because > + * these types are essentially unsupported by this interface. > + * We don't check up front because this makes it easier to add > + * support for various types at a later date if necessary. > + */ > + status = AE_TYPE; > + info->return_object = NULL; /* No need to delete a NS Node > */ > + return_buffer->length = 0; > + } > > - acpi_ns_resolve_references(info); > + if (ACPI_FAILURE(status)) > + goto out; > > - /* Get the size of the returned object */ > + /* Dereference Index and ref_of references */ > > - status = > - acpi_ut_get_object_size(info->return_object, > - > &buffer_space_needed); > - if (ACPI_SUCCESS(status)) { > - > - /* Validate/Allocate/Clear caller > buffer */ > - > - status = > - acpi_ut_initialize_buffer > - (return_buffer, > - buffer_space_needed); > - if (ACPI_FAILURE(status)) { > - /* > - * Caller's buffer is too small > or a > new one can't > - * be allocated > - */ > - ACPI_DEBUG_PRINT((ACPI_DB_INFO, > - "Needed > buffer size %X, > %s\n", > - (u32) > - > buffer_space_needed, > - > acpi_format_exception > - (status))); > - } else { > - /* We have enough space for the > object, build it */ > - > - status = > - > acpi_ut_copy_iobject_to_eobject > - (info->return_object, > - return_buffer); > - } > - } > - } > + acpi_ns_resolve_references(info); > + > + /* Get the size of the returned object */ > + > + status = acpi_ut_get_object_size(info->return_object, > + &buffer_space_needed); > + if (ACPI_SUCCESS(status)) { > + > + /* Validate/Allocate/Clear caller buffer */ > + > + status = acpi_ut_initialize_buffer(return_buffer, > + buffer_space_needed); > + if (ACPI_FAILURE(status)) { > + /* > + * Caller's buffer is too small or a new one can't > + * be allocated > + */ > + ACPI_DEBUG_PRINT((ACPI_DB_INFO, > + "Needed buffer size %X, %s\n", > + (u32)buffer_space_needed, > + acpi_format_exception(status))); > + } else { > + /* We have enough space for the object, build it */ > + > + status = acpi_ut_copy_iobject_to_eobject( > + info->return_object, return_buffer); > } > } > > +out: > if (info->return_object) { > /* > * Delete the internal return object. NOTE: Interpreter must > be > -- > 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
