Date: Thu, 28 Feb 2013 18:49:32 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r247487 - stable/9/sys/dev/acpica Message-ID: <201302281849.r1SInW12005382@svn.freebsd.org>
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Author: jhb Date: Thu Feb 28 18:49:31 2013 New Revision: 247487 URL: http://svnweb.freebsd.org/changeset/base/247487 Log: MFC 241748: When checking to see if a video output's _ADR matches an entry in the parent adapter's _DOD list, only check the low 16 bits of both _ADR and _DOD. The language in the ACPI spec seems to indicate that the _ADR values should exactly match the entries in _DOD. However, I assume that the masking added to _DOD values was added to work around some known busted machines (the commit history doesn't indicate either way), and the ACPI spec does require that the low 16 bits are unique for all video outputs, so only checking the low 16 bits should be fine. This fixes recognition of video outputs that use the new standardized device ID scheme in ACPI 3.0 that set bit 31 such as certain Dell laptops. Modified: stable/9/sys/dev/acpica/acpi_video.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/dev/ (props changed) Modified: stable/9/sys/dev/acpica/acpi_video.c ============================================================================== --- stable/9/sys/dev/acpica/acpi_video.c Thu Feb 28 18:46:56 2013 (r247486) +++ stable/9/sys/dev/acpica/acpi_video.c Thu Feb 28 18:49:31 2013 (r247487) @@ -906,7 +906,8 @@ vid_enum_outputs_subr(ACPI_HANDLE handle for (i = 0; i < argset->dod_pkg->Package.Count; i++) { if (acpi_PkgInt32(argset->dod_pkg, i, &val) == 0 && - (val & DOD_DEVID_MASK_FULL) == adr) { + (val & DOD_DEVID_MASK_FULL) == + (adr & DOD_DEVID_MASK_FULL)) { argset->callback(handle, val, argset->context); argset->count++; }
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