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2008-11-18x86: quirk for reboot stalls on a Dell Optiplex 330Steve Conklin
Dell Optiplex 330 appears to hang on reboot. This is resolved by adding a quirk to set bios reboot. Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com> Signed-off-by: Steve Conklin <steve.conklin@canonical.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-18Merge branch 'iommu-fixes-2.6.28' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent
2008-11-18x86: more general identifier for Phoenix BIOSPhilipp Kohlbecher
Impact: widen the reach of the low-memory-protect DMI quirk Phoenix BIOSes variously identify their vendor as "Phoenix Technologies, LTD" or "Phoenix Technologies LTD" (without the comma.) This patch makes the identification string in the bad_bios_dmi_table more general (following a suggestion by Ingo Molnar), so that both versions are handled. Again, the patched file compiles cleanly and the patch has been tested successfully on my machine. Signed-off-by: Philipp Kohlbecher <xt28@gmx.de> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-18AMD IOMMU: check for next_bit also in unmapped areaJoerg Roedel
Impact: fix possible use of stale IO/TLB entries Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-11-18AMD IOMMU: fix fullflush comparison lengthJoerg Roedel
Impact: fix comparison length for 'fullflush' Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-11-18AMD IOMMU: enable device isolation per defaultJoerg Roedel
Impact: makes device isolation the default for AMD IOMMU Some device drivers showed double-free bugs of DMA memory while testing them with AMD IOMMU. If all devices share the same protection domain this can lead to data corruption and data loss. Prevent this by putting each device into its own protection domain per default. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-11-18AMD IOMMU: add parameter to disable device isolationJoerg Roedel
Impact: add a new AMD IOMMU kernel command line parameter Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-11-18x86, PEBS/DS: fix code flow in ds_request()Ingo Molnar
this compiler warning: arch/x86/kernel/ds.c: In function 'ds_request': arch/x86/kernel/ds.c:368: warning: 'context' may be used uninitialized in this function Shows that the code flow in ds_request() is buggy - it goes into the unlock+release-context path even when the context is not allocated yet. First allocate the context, then do the other checks. Also, take care with GFP allocations under the ds_lock spinlock. Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-18x86: add rdtsc barrier to TSC sync checkVenki Pallipadi
Impact: fix incorrectly marked unstable TSC clock Patch (commit 0d12cdd "sched: improve sched_clock() performance") has a regression on one of the test systems here. With the patch, I see: checking TSC synchronization [CPU#0 -> CPU#1]: Measured 28 cycles TSC warp between CPUs, turning off TSC clock. Marking TSC unstable due to check_tsc_sync_source failed Whereas, without the patch syncs pass fine on all CPUs: checking TSC synchronization [CPU#0 -> CPU#1]: passed. Due to this, TSC is marked unstable, when it is not actually unstable. This is because syncs in check_tsc_wrap() goes away due to this commit. As per the discussion on this thread, correct way to fix this is to add explicit syncs as below? Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: rtc: rtc-sun4v fixes, revised sparc: Fix tty compile warnings. sparc: struct device - replace bus_id with dev_name(), dev_set_name()
2008-11-16x86: fix es7000 compilingYinghai Lu
Impact: fix es7000 build CC arch/x86/kernel/es7000_32.o arch/x86/kernel/es7000_32.c: In function find_unisys_acpi_oem_table: arch/x86/kernel/es7000_32.c:255: error: implicit declaration of function acpi_get_table_with_size arch/x86/kernel/es7000_32.c:261: error: implicit declaration of function early_acpi_os_unmap_memory arch/x86/kernel/es7000_32.c: In function unmap_unisys_acpi_oem_table: arch/x86/kernel/es7000_32.c:277: error: implicit declaration of function __acpi_unmap_table make[1]: *** [arch/x86/kernel/es7000_32.o] Error 1 we applied one patch out of order... | commit a73aaedd95703bd49f4c3f9df06fb7b7373ba905 | Author: Yinghai Lu <yhlu.kernel@gmail.com> | Date: Sun Sep 14 02:33:14 2008 -0700 | | x86: check dsdt before find oem table for es7000, v2 | | v2: use __acpi_unmap_table() that patch need: x86: use early_ioremap in __acpi_map_table x86: always explicitly map acpi memory acpi: remove final __acpi_map_table mapping before setting acpi_gbl_permanent_mmap acpi/x86: introduce __apci_map_table, v4 submitted to the ACPI tree but not upstream yet. fix it until those patches applied, need to revert this one Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-16x86, bts: fix unlock problem in ds.cMarkus Metzger
Fix a problem where ds_request() returned an error without releasing the ds lock. Reported-by: Stephane Eranian <eranian@gmail.com> Signed-off-by: Markus Metzger <markus.t.metzger@gmail.com> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-15Merge branch 'sh/for-2.6.28' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 * 'sh/for-2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: serial: sh-sci: Reorder the SCxTDR write after the TDxE clear. sh: __copy_user function can corrupt the stack in case of exception sh: Fixed the TMU0 reload value on resume sh: Don't factor in PAGE_OFFSET for valid_phys_addr_range() check. sh: early printk port type fix i2c: fix i2c-sh_mobile rx underrun sh: Provide a sane valid_phys_addr_range() to prevent TLB reset with PMB. usb: r8a66597-hcd: fix wrong data access in SuperH on-chip USB fix sci type for SH7723 serial: sh-sci: fix cannot work SH7723 SCIFA sh: Handle fixmap TLB eviction more coherently.
2008-11-15Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] fix s390x_newuname [S390] dasd: log sense for fatal errors [S390] cpu topology: fix locking [S390] cio: Fix refcount after moving devices. [S390] ftrace: fix kernel stack backchain walking [S390] ftrace: disable tracing on idle psw [S390] lockdep: fix compile bug [S390] kvm_s390: Fix oops in virtio device detection with "mem=" [S390] sclp: emit error message if assign storage fails [S390] Fix range for add_active_range() in setup_memory()
2008-11-15Revert "x86: blacklist DMAR on Intel G31/G33 chipsets"David Woodhouse
This reverts commit e51af6630848406fc97adbd71443818cdcda297b, which was wrongly hoovered up and submitted about a month after a better fix had already been merged. The better fix is commit cbda1ba898647aeb4ee770b803c922f595e97731 ("PCI/iommu: blacklist DMAR on Intel G31/G33 chipsets"), where we do this blacklisting based on the DMI identification for the offending motherboard, since sometimes this chipset (or at least a chipset with the same PCI ID) apparently _does_ actually have an IOMMU. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-15m68k: Fix off-by-one in m68k_setup_user_interrupt()Geert Uytterhoeven
commit 69961c375288bdab7604e0bb1c8d22999bb8a347 ("[PATCH] m68k/Atari: Interrupt updates") added a BUG_ON() with an incorrect upper bound comparison, which causes an early crash on VME boards, where IRQ_USER is 8, cnt is 192 and NR_IRQS is 200. Reported-by: Stephen N Chivers <schivers@csc.com.au> Tested-by: Kars de Jong <jongk@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-14[S390] fix s390x_newunameMartin Schwidefsky
The uname system call for 64 bit compares current->personality without masking the upper 16 bits. If e.g. READ_IMPLIES_EXEC is set the result of a uname system call will always be s390x even if the process uses the s390 personality. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-11-14[S390] cpu topology: fix lockingHeiko Carstens
cpu_coregroup_map used to grab a mutex on s390 since it was only called from process context. Since c7c22e4d5c1fdebfac4dba76de7d0338c2b0d832 "block: add support for IO CPU affinity" this is not true anymore. It now also gets called from softirq context. To prevent possible deadlocks change this in architecture code and use a spinlock instead of a mutex. Cc: stable@kernel.org Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-11-14[S390] ftrace: fix kernel stack backchain walkingHeiko Carstens
With CONFIG_IRQSOFF_TRACER the trace_hardirqs_off() function includes a call to __builtin_return_address(1). But we calltrace_hardirqs_off() from early entry code. There we have just a single stack frame. So this results in a kernel stack backchain walk that would walk beyond the kernel stack. Following the NULL terminated backchain this results in a lowcore read access. To fix this we simply call trace_hardirqs_off_caller() and pass the current instruction pointer. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-11-14[S390] ftrace: disable tracing on idle pswHeiko Carstens
Disable tracing on idle psw. Otherwise it would give us huge preempt off times for idle. Which is rather pointless. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-11-14[S390] lockdep: fix compile bugHeiko Carstens
arch/s390/kernel/built-in.o: In function `cleanup_io_leave_insn': mem_detect.c:(.text+0x10592): undefined reference to `lockdep_sys_exit' Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-11-14[S390] Fix range for add_active_range() in setup_memory()Gerald Schaefer
add_active_range() expects start_pfn + size as end_pfn value, i.e. not the pfn of the last page frame but the one behind that. We used the pfn of the last page frame so far, which can lead to a BUG_ON in move_freepages(), when the kernelcore parameter is specified (page_zone(start_page) != page_zone(end_page)). Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-11-13Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] cdb89712: avoid namespace clashes with SRAM_ and BOOTROM_ constants [ARM] cdb89712,clps7500,h720x: avoid namespace clash for FLASH_* constants [ARM] integrator,realview,versatile: remove FLASH_* and EPROM_* constants [ARM] dma-mapping: fix compiler warning [ARM] iop: iop3xx needs registers mapped uncached+unbuffered [ARM] versatile: correct MMC clock rate [ARM] realview: correct MMC clock rate [ARM] 5329/1: Feroceon: fix feroceon_l2_inv_range
2008-11-13fix cpumask build breakage on pariscHelge Deller
Commit 2d3854a37e8b767a51aba38ed6d22817b0631e33 ("cpumask: introduce new API, without changing anything") introduced a build breakage on parisc. This trivial patch fixes it. Signed-off-by: Helge Deller <deller@gmx.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Kyle Mc Martin <kyle@hera.kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-13[ARM] cdb89712: avoid namespace clashes with SRAM_ and BOOTROM_ constantsRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-13[ARM] cdb89712,clps7500,h720x: avoid namespace clash for FLASH_* constantsRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-13[ARM] integrator,realview,versatile: remove FLASH_* and EPROM_* constantsRussell King
FLASH_* and EPROM_* constants are unused, and clash with drivers: drivers/atm/ambassador.h:257:1: warning: "FLASH_BASE" redefined drivers/atm/ambassador.h:258:1: warning: "FLASH_SIZE" redefined drivers/atm/iphase.h:332:1: warning: "EPROM_SIZE" redefined so remove them. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-13[ARM] dma-mapping: fix compiler warningRussell King
arch/arm/mm/dma-mapping.c: In function `dma_sync_sg_for_cpu': arch/arm/mm/dma-mapping.c:588: warning: statement with no effect Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-11-13serial: sh-sci: Reorder the SCxTDR write after the TDxE clear.Paul Mundt
Under qemu there is a race between the TDxE read-and-clear and the SCxTDR write. While on hardware it can be gauranteed that the read-and-clear will happen prior to the character being written out, no such assumption can be made under emulation. As this path happens with IRQs off and the hardware itself doesn't care about the ordering, move the SCxTDR write until after the read-and-clear. Signed-off-by: Vladimir Prus <vladimir@codesourcery.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-11-13sh: __copy_user function can corrupt the stack in case of exceptionStuart MENEFY
The __copy_user function can corrupt the stack in the case of a non-trivial length of data, and either of the first two move instructions cause an exception. This is because the fixup for these two instructions is mapped to the no_pop case, but these instructions execute after the stack is pushed. This change creates an explicit NO_POP exception mapping macro, and uses it for the two instructions executed in the trivial case where no stack pushes occur. More information at ST Linux bugzilla: https://bugzilla.stlinux.com/show_bug.cgi?id=4824 Signed-off-by: Dylan Reid <dylan_reid@bose.com> Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-11-13sh: Fixed the TMU0 reload value on resumeFrancesco VIRLINZI
This patch fixes the TMU0 interrupt frequency on suspend/resume. During the resume the kernel reprograms the TMU0.ClockEvent mode but if the mode is periodic than the TMU0.TCOR is updated with a random wrong value without taking care latest valid saved value. There was no problem with No_HZ system where TMU0.TCOR isn't used. Signed-off-by: Francesco M. Virlinzi <francesco.virlinzi@st.com> Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-11-12sparc: Fix tty compile warnings.Robert Reif
This patch fixes tty compile warnings as sugested by Alan Cox: CC drivers/char/n_tty.o drivers/char/n_tty.c: In function ‘normal_poll’: drivers/char/n_tty.c:1555: warning: array subscript is above array bounds drivers/char/n_tty.c:1564: warning: array subscript is above array bounds drivers/char/n_tty.c: In function ‘read_chan’: drivers/char/n_tty.c:1269: warning: array subscript is above array bounds CC drivers/char/tty_ioctl.o drivers/char/tty_ioctl.c: In function ‘set_termios’: drivers/char/tty_ioctl.c:533: warning: array subscript is above array bounds drivers/char/tty_ioctl.c:537: warning: array subscript is above array bounds drivers/char/tty_ioctl.c: In function ‘tty_mode_ioctl’: drivers/char/tty_ioctl.c:662: warning: array subscript is above array bounds drivers/char/tty_ioctl.c:892: warning: array subscript is above array bounds drivers/char/tty_ioctl.c:896: warning: array subscript is above array bounds drivers/char/tty_ioctl.c:577: warning: array subscript is above array bounds drivers/char/tty_ioctl.c:928: warning: array subscript is above array bounds drivers/char/tty_ioctl.c:934: warning: array subscript is above array bounds Signed-off-by: Robert Reif <reif@earthlink.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-12sparc: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers
Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-13sh: Don't factor in PAGE_OFFSET for valid_phys_addr_range() check.Paul Mundt
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-11-13sh: early printk port type fixMagnus Damm
Add PORT_SCIF to unbreak the early printk code. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-11-12Merge branch 'fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: dmaengine: struct device - replace bus_id with dev_name(), dev_set_name() iop-adma: use iop_paranoia() for debug BUG_ONs iop-adma: add a dummy read to flush next descriptor update
2008-11-12MN10300: Don't do misalignment handling for userspaceDavid Howells
Don't do misalignment handling for userspace misalignment faults: just generate an appropriate SIGBUS instead. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Don't handle misaligned loading and storing of SPDavid Howells
Don't handle the misaligned loading and storing of the SP register as in C code that's most certainly a compiler bug. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Handle misaligned SP-based operandsDavid Howells
Support misalignment handling for instructions that have kernel SP-based address operands, including fixing those that include IMM8 or IMM16 displacements. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Fix misaligned index-register addressing handlingDavid Howells
Fix misalignment handling for an address calculated from the sum of two registers. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Handle misaligned postinc-with-imm addressing mode correctlyDavid Howells
Correctly handle misalignment in MOV instructions with postinc-with-immediate addressing mode operands. In these, the immediate value is the increment to be applied the address register, not the displacement to the address. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Perform misalignment fixups of MOV_LccDavid Howells
Perform misalignment fixups of the MOV_Lcc instructions (move postinc memory to register and conditionally loop). Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Allow misalignment fixup in interrupt handlingDavid Howells
Allow misalignment fixup in interrupt handling in the MN10300 arch. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Fix register-postinc addressing misalignment handlingDavid Howells
Fix misalignment handling of operands with register postincrement addressing. The flag to indicate that postincrement is required should not be interpreted as an specification of a value to be added to the address. Also add BUGs to catch unimplemented parameter markings in the opcodes table. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Extract the displacement from an insn correctly in misalignment fixupDavid Howells
Extract the displacement from an MN10300 instruction correctly in the misalignment fixup handler. The code should extract the displacement in LSB order, not MSB order. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Add further misalignment fixupsDavid Howells
Add further misalignment fixup support to the MN10300 arch, notably for ABS32 and SP+disp addressing. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Add built-in testing for misalignment handlerDavid Howells
Add configurable built-in testing for the MN10300 misalignment handler. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12MN10300: Clean up the misalignment handler a littleDavid Howells
Clean up the MN10300 misalignment handler a little by: (1) Use ilog2() rather than doing implementing log2() locally. (2) Make format_tbl[] const and static. (3) Making the debugging prints more consistent. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-11-12Merge branch 'kvm-updates/2.6.28' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'kvm-updates/2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: KVM: Fix pit memory leak if unable to allocate irq source id KVM: ia64: fix vmm_spin_{un}lock for !CONFIG_SMP KVM: VMX: Set IGMT bit in EPT entry KVM: Require the PCI subsystem x86: KVM guest: fix section mismatch warning in kvmclock.c KVM: ia64: Use guest signal mask when blocking KVM: MMU: increase per-vcpu rmap cache alloc size
2008-11-12Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (47 commits) ACPI: pci_link: remove acpi_irq_balance_set() interface fujitsu-laptop: Add DMI callback for Lifebook S6420 ACPI: EC: Don't do transaction from GPE handler in poll mode. ACPI: EC: lower interrupt storm treshold ACPICA: Use spinlock for acpi_{en|dis}able_gpe ACPI: EC: restart failed command ACPI: EC: wait for last write gpe ACPI: EC: make kernel messages more useful when GPE storm is detected ACPI: EC: revert msleep patch thinkpad_acpi: fingers off backlight if video.ko is serving this functionality sony-laptop: fingers off backlight if video.ko is serving this functionality msi-laptop: fingers off backlight if video.ko is serving this functionality fujitsu-laptop: fingers off backlight if video.ko is serving this functionality eeepc-laptop: fingers off backlight if video.ko is serving this functionality compal: fingers off backlight if video.ko is serving this functionality asus-acpi: fingers off backlight if video.ko is serving this functionality Acer-WMI: fingers off backlight if video.ko is serving this functionality ACPI video: if no ACPI backlight support, use vendor drivers ACPI: video: Ignore devices that aren't present in hardware Delete an unwanted return statement at evgpe.c ...
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