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2013-05-18Merge branch 'devm_no_resource_check' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull devm usage cleanup from Wolfram Sang: "Lately, I have been experimenting how to improve the devm interface to make writing device drivers easier and less error prone while also getting rid of its subtle issues. I think it has more potential but still needs work and definately conistency, especiall in its usage. The first thing I come up with is a low hanging fruit regarding devm_ioremap_resouce(). This function already checks if the passed resource is valid and gives an error message if not. So, we can remove similar checks from the drivers and get rid of a bit of code and a number of inconsistent error strings. This series only removes the unneeded check iff devm_ioremap_resource follows platform_get_resource directly. The previous version tried to shuffle code if needed, too, what lead to an embarrasing bug. It turned out to me that shuffling code for all cases found will make the automated script too complex, so I am unsure if an automated cleanup is the proper tool for this case. Removing the easy stuff seems worthwhile to me, though. Despite various architectures and platform dependencies, I managed to compile test 45 out of 57 modified files locally using heuristics and defconfigs." Pulled because: 296 deletions, 0 additions. * 'devm_no_resource_check' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (33 commits) sound/soc/kirkwood: don't check resource with devm_ioremap_resource sound/soc/fsl: don't check resource with devm_ioremap_resource arch/mips/lantiq/xway: don't check resource with devm_ioremap_resource arch/arm/plat-samsung: don't check resource with devm_ioremap_resource arch/arm/mach-tegra: don't check resource with devm_ioremap_resource drivers/watchdog: don't check resource with devm_ioremap_resource drivers/w1/masters: don't check resource with devm_ioremap_resource drivers/video/omap2/dss: don't check resource with devm_ioremap_resource drivers/video/omap2: don't check resource with devm_ioremap_resource drivers/usb/phy: don't check resource with devm_ioremap_resource drivers/usb/host: don't check resource with devm_ioremap_resource drivers/usb/gadget: don't check resource with devm_ioremap_resource drivers/usb/chipidea: don't check resource with devm_ioremap_resource drivers/thermal: don't check resource with devm_ioremap_resource drivers/staging/nvec: don't check resource with devm_ioremap_resource drivers/staging/dwc2: don't check resource with devm_ioremap_resource drivers/spi: don't check resource with devm_ioremap_resource drivers/rtc: don't check resource with devm_ioremap_resource drivers/pwm: don't check resource with devm_ioremap_resource drivers/pinctrl: don't check resource with devm_ioremap_resource ...
2013-05-18Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linuxLinus Torvalds
Pull device tree fixes from Grant Likely: "Device tree bug fixes and documentation updates for v3.10 Nothing earth shattering here. A build failure fix, and fix for releasing nodes and some documenation updates." * tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux: Documentation/devicetree: make semantic of initrd-end more explicit of/base: release the node correctly in of_parse_phandle_with_args() of/documentation: move video device bindings to a common place <linux/of_platform.h>: fix compilation warnings with DT disabled
2013-05-18Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds
Pull MIPS fixes from Ralf Baechle: "Patching up across the field. The reversion of the two ASID patches is particularly important as it was breaking many platforms." * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: ralink: use the dwc2 driver for the rt305x USB controller MIPS: Extract schedule_mfi info from __schedule MIPS: Fix sibling call handling in get_frame_info MIPS: MSP71xx: remove inline marking of EXPORT_SYMBOL functions MIPS: Make virt_to_phys() work for all unmapped addresses. MIPS: Fix build error for crash_dump.c in 3.10-rc1 MIPS: Xway: Fix clk leak Revert "MIPS: Allow ASID size to be determined at boot time." Revert "MIPS: microMIPS: Support dynamic ASID sizing."
2013-05-18Merge tag 'kmemleak-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 Pull kmemleak patches from Catalin Marinas: "Kmemleak now scans all the writable and non-executable module sections to avoid false positives (previously it was only scanning specific sections and missing .ref.data)." * tag 'kmemleak-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: kmemleak: No need for scanning specific module sections kmemleak: Scan all allocated, writeable and not executable module sections
2013-05-18Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 Pull arm64 fixes from Catalin Marinas: "Fixes for duplicate definition of early_console, kernel/time/Kconfig include, __flush_dcache_all() set/way computing, debug (locking, bit testing). The of_platform_populate() was moved to an arch_init_call() to allow subsys_init_call() drivers to probe the DT." * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: arm64: debug: fix mdscr.ss check when enabling debug exceptions arm64: Do not source kernel/time/Kconfig explicitly arm64: mm: Fix operands of clz in __flush_dcache_all arm64: Invoke the of_platform_populate() at arch_initcall() level arm64: debug: clear mdscr_el1 instead of taking the OS lock arm64: Fix duplicate definition of early_console
2013-05-18sound/soc/kirkwood: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18sound/soc/fsl: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18arch/mips/lantiq/xway: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: John Crispin <blogic@openwrt.org>
2013-05-18arch/arm/plat-samsung: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18arch/arm/mach-tegra: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Stephen Warren <swarren@nvidia.com>
2013-05-18drivers/watchdog: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/w1/masters: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/video/omap2/dss: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/video/omap2: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/usb/phy: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/usb/host: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Alan Stern <stern@rowland.harvard.edu>
2013-05-18drivers/usb/gadget: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/usb/chipidea: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
2013-05-18drivers/thermal: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/staging/nvec: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/staging/dwc2: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/spi: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Stephen Warren <swarren@nvidia.com>
2013-05-18drivers/rtc: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Stephen Warren <swarren@nvidia.com>
2013-05-18drivers/pwm: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Stephen Warren <swarren@nvidia.com>
2013-05-18drivers/pinctrl: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/net/ethernet/renesas: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/mtd/nand: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/misc: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/mfd: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/memory: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/i2c/busses: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Stephen Warren <swarren@nvidia.com> Acked-by: Barry Song <Baohua.Song@csr.com>
2013-05-18drivers/gpu/host1x/drm: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/gpu/drm/exynos: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-18drivers/gpio: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Stephen Warren <swarren@nvidia.com>
2013-05-18drivers/dma: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Stephen Warren <swarren@nvidia.com>
2013-05-18drivers/cpufreq: don't check resource with devm_ioremap_resourceWolfram Sang
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-05-17MIPS: ralink: use the dwc2 driver for the rt305x USB controllerMatthijs Kooijman
This sets up the devicetree file for the rt3050 chip series and rt3052 eval board to use the right compatible string for the dwc2 driver. Acked-by: John Crispin <blogic@openwrt.org> Cc: blogic@openwrt.org Cc: linux-mips@linux-mips.org Cc: Matthijs Kooijman <matthijs@stdin.nl> Patchwork: https://patchwork.linux-mips.org/patch/5226/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-05-17MIPS: Extract schedule_mfi info from __scheduleTony Wu
schedule_mfi is supposed to be extracted from schedule(), and is used in thread_saved_pc and get_wchan. But, after optimization, schedule() is reduced to a sibling call to __schedule(), and no real frame info can be extracted. One solution is to compile schedule() with -fno-omit-frame-pointer and -fno-optimize-sibling-calls, but that will incur performance degradation. Another solution is to extract info from the real scheduler, __schedule, and this is the approache adopted here. This patch reads the __schedule address by either following the 'j' call in schedule if KALLSYMS is disabled or by using kallsyms_lookup_name to lookup __schedule if KALLSYMS is available, then, extracts schedule_mfi from __schedule frame info. This patch also fixes the "Can't analyze schedule() prologue" warning at boot time. Signed-off-by: Tony Wu <tung7970@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5237/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-05-17MIPS: Fix sibling call handling in get_frame_infoTony Wu
Given a function, get_frame_info() analyzes its instructions to figure out frame size and return address. get_frame_info() works as follows: 1. analyze up to 128 instructions if the function size is unknown 2. search for 'addiu/daddiu sp,sp,-immed' for frame size 3. search for 'sw ra,offset(sp)' for return address 4. end search when it sees jr/jal/jalr This leads to an issue when the given function is a sibling call, example shown as follows. 801ca110 <schedule>: 801ca110: 8f820000 lw v0,0(gp) 801ca114: 8c420000 lw v0,0(v0) 801ca118: 080726f0 j 801c9bc0 <__schedule> 801ca11c: 00000000 nop 801ca120 <io_schedule>: 801ca120: 27bdffe8 addiu sp,sp,-24 801ca124: 3c028022 lui v0,0x8022 801ca128: afbf0014 sw ra,20(sp) In this case, get_frame_info() cannot properly detect schedule's frame info, and eventually returns io_schedule's instead. This patch adds 'j' to the end search condition to workaround sibling call cases. Signed-off-by: Tony Wu <tung7970@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5236/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-05-17MIPS: MSP71xx: remove inline marking of EXPORT_SYMBOL functionsDenis Efremov
EXPORT_SYMBOL and inline directives are contradictory to each other. The patch fixes this inconsistency. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Denis Efremov <yefremov.denis@gmail.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: trivial@kernel.org Cc: ldv-project@linuxtesting.org Patchwork: https://patchwork.linux-mips.org/patch/5227/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-05-17MIPS: Make virt_to_phys() work for all unmapped addresses.David Daney
As reported: This problem was discovered when doing BGP traffic with the TCP MD5 option activated, where the following call chain caused a crash: * tcp_v4_rcv * tcp_v4_timewait_ack * tcp_v4_send_ack -> follow stack variable rep.th * tcp_v4_md5_hash_hdr * tcp_md5_hash_header * sg_init_one * sg_set_buf * virt_to_page I noticed that tcp_v4_send_reset uses a similar stack variable and also calls tcp_v4_md5_hash_hdr, so it has the same problem. The networking core can indirectly call virt_to_phys() on stack addresses, if this is done from PID 0, the stack will usually be in CKSEG0, so virt_to_phys() needs to work there as well Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: Jiang Liu <liuj97@gmail.com> Cc: eunb.song@samsung.com Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/5220/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-05-17MIPS: Fix build error for crash_dump.c in 3.10-rc1EunBong Song
This patch fixes crash_dump.c build error. Build error logs are as follow. arch/mips/kernel/crash_dump.c: In function 'kdump_buf_page_init': arch/mips/kernel/crash_dump.c:67: error: implicit declaration of function 'kmalloc' arch/mips/kernel/crash_dump.c:67: error: assignment makes pointer from integer without a cast Signed-off-by: EunBong Song <eunb.song@samsung.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/5238/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-05-17MIPS: Xway: Fix clk leakLibo Chen
When gptu_r32 fails, we should put clk before returning. Signed-off-by: Libo Chen <libo.chen@huawei.com> Acked-by: John Crispin <blogic@openwrt.org> Cc: grant.likely@linaro.org Cc: rob.herring@calxeda.com, Cc: linux-mips@linux-mips.org Cc: LKML linux-kernel@vger.kernel.org Cc: Andrew Morton akpm@linux-foundation.org Cc: Li Zefan lizefan@huawei.com Patchwork: https://patchwork.linux-mips.org/patch/5247/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-05-17arm64: debug: fix mdscr.ss check when enabling debug exceptionsWill Deacon
When we take an exception at EL1, we only want to enable debug exceptions if we're not currently stepping, otherwise we can easily get stuck in a loop stepping into interrupt handlers. Unfortunately, the current code tests the wrong bit in the mdscr, so fix that. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-05-17Merge tag 'sound-3.10' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "A fairly calm update at this time, as seen in the short log, only one fix per person: including, - a few ASoC fixes (da7213 dmic, ux500 AD slot, wm0010 error path) - a copule of HD-audio fixes - a few other misc fixes (MIPS allmodconfig, proc output in usb, old PowerBook support)" * tag 'sound-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: usb-audio: proc: use found syncmaxsize to determine feedback format ALSA: hda - Add headset mic support for another Dell machine ALSA: snd-aoa: Add a layout entry for PowerBook6,5 ALSA: hda - Check the activity of the NID to be powered down sound: Fix make allmodconfig on MIPS correctly ASoC: da7213: Fix setting dmic_samplephase and dmic_clk_rate ASoC: ux500: Swap even/odd AD slot definitions ASoC: wm0010: fix error return code in wm0010_boot()
2013-05-17kmemleak: No need for scanning specific module sectionsSteven Rostedt
As kmemleak now scans all module sections that are allocated, writable and non executable, there's no need to scan individual sections that might reference data. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au>
2013-05-17kmemleak: Scan all allocated, writeable and not executable module sectionsSteven Rostedt
Instead of just picking data sections by name (names that start with .data, .bss or .ref.data), use the section flags and scan all sections that are allocated, writable and not executable. Which should cover all sections of a module that might reference data. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> [catalin.marinas@arm.com: removed unused 'name' variable] [catalin.marinas@arm.com: collapsed 'if' blocks] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au>
2013-05-17ALSA: usb-audio: proc: use found syncmaxsize to determine feedback formatTorstein Hegge
freqshift is only set for the data endpoint and syncmaxsize is only set for the sync endpoint. This results in a syncmaxsize of zero used in the proc output feedback format calculation, which gives a feedback format incorrectly shown as 8.16 for UAC2 devices. As neither the data nor the sync endpoint gives all the relevant content, output the two combined. Also remove the sync_endpoint "packet size" which is always zero and the sync_endpoint "momentary freq" which is constant. Tested with UAC2 async and UAC1 adaptive, not tested with UAC1 async. Reported-by: B. Zhang <bb.zhang@free.fr> Signed-off-by: Torstein Hegge <hegge@resisty.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-05-16Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds
Pull drm fixes from Dave Airlie: "Fix for radeon nomodeset regression, old radeon interface cliprects fix, 2 qxl crasher fixes, and a couple of minor cleanups. I may have a new AMD hw support branch next week, its one of those doesn't affect anything existing just adds new support, I'll see how it shapes up and I might ask you to take it, just thought I'd warn in advance." * 'drm-next' of git://people.freedesktop.org/~airlied/linux: drm/radeon: restore nomodeset operation (v2) qxl: fix bug with object eviction and update area drm/qxl: drop active_user_framebuffer as its unneeded qxl: drop unused variable. drm/qxl: fix ioport interactions for kernel submitted commands. drm: remove unused wrapper macros drm/radeon: check incoming cliprects pointer
2013-05-17drm/radeon: restore nomodeset operation (v2)Dave Airlie
When UMS was deprecated it removed support for nomodeset commandline we really want this in distro land so we can debug stuff, everyone should fallback to vesa correctly. v2: oops -1 isn't used anymore, restore original behaviour -1 is default, so we can boot with nomodeset on the command line, then use radeon.modeset=1 to override it for debugging later. Cc: stable@vger.kernel.org Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>