# git rev-parse -q --verify 253fd51e2f533552ae35a0c661705da6c4842c1b^{commit} 253fd51e2f533552ae35a0c661705da6c4842c1b already have revision, skipping fetch # git checkout -q -f -B kisskb 253fd51e2f533552ae35a0c661705da6c4842c1b # git clean -qxdf # git log -1 commit 253fd51e2f533552ae35a0c661705da6c4842c1b Author: Alistair Popple Date: Wed Jul 26 15:26:40 2017 +1000 powerpc/powernv/pci: Return failure for some uses of dma_set_mask() Commit 8e3f1b1d8255 ("powerpc/powernv/pci: Enable 64-bit devices to access >4GB DMA space") introduced the ability for PCI device drivers to request a DMA mask between 64 and 32 bits and actually get a mask greater than 32-bits. However currently if certain machine configuration dependent conditions are not meet the code silently falls back to a 32-bit mask. This makes it hard for device drivers to detect which mask they actually got. Instead we should return an error when the request could not be fulfilled which allows drivers to either fallback or implement other workarounds as documented in DMA-API-HOWTO.txt. Signed-off-by: Alistair Popple Acked-by: Russell Currey Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < git log --format=%s --max-count=1 253fd51e2f533552ae35a0c661705da6c4842c1b # < make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-fixes_powerpc-allnoconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- allnoconfig # make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-fixes_powerpc-allnoconfig_powerpc-5.3 CROSS_COMPILE=/opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux- make[1]: Entering directory '/home/kisskb/slave/build/powerpc-fixes_powerpc-allnoconfig_powerpc-5.3' GEN ./Makefile scripts/kconfig/conf --silentoldconfig Kconfig CHK include/config/kernel.release GEN ./Makefile UPD include/config/kernel.release WRAP arch/powerpc/include/generated/asm/clkdev.h WRAP arch/powerpc/include/generated/asm/div64.h WRAP arch/powerpc/include/generated/asm/export.h WRAP arch/powerpc/include/generated/asm/irq_regs.h WRAP arch/powerpc/include/generated/asm/irq_work.h WRAP arch/powerpc/include/generated/asm/local64.h WRAP arch/powerpc/include/generated/asm/mcs_spinlock.h WRAP arch/powerpc/include/generated/asm/preempt.h WRAP arch/powerpc/include/generated/asm/rwsem.h WRAP arch/powerpc/include/generated/asm/vtime.h CHK include/generated/uapi/linux/version.h UPD include/generated/uapi/linux/version.h WRAP arch/powerpc/include/generated/uapi/asm/param.h WRAP arch/powerpc/include/generated/uapi/asm/poll.h WRAP arch/powerpc/include/generated/uapi/asm/resource.h WRAP arch/powerpc/include/generated/uapi/asm/statfs.h WRAP arch/powerpc/include/generated/uapi/asm/sockios.h CHK include/generated/utsrelease.h UPD include/generated/utsrelease.h Using /home/kisskb/slave/src as source for kernel HOSTCC scripts/sortextable HOSTCC scripts/dtc/dtc.o HOSTCC scripts/dtc/flattree.o CC scripts/mod/empty.o HOSTCC scripts/dtc/fstree.o HOSTCC scripts/mod/mk_elfconfig HOSTCC scripts/dtc/data.o HOSTCC scripts/dtc/treesource.o HOSTCC scripts/dtc/srcpos.o HOSTCC scripts/dtc/util.o SHIPPED scripts/dtc/dtc-lexer.lex.c HOSTCC scripts/dtc/checks.o SHIPPED scripts/dtc/dtc-parser.tab.h SHIPPED scripts/dtc/dtc-parser.tab.c HOSTCC scripts/dtc/dtc-lexer.lex.o HOSTCC scripts/dtc/dtc-parser.tab.o HOSTCC scripts/dtc/livetree.o CC scripts/mod/devicetable-offsets.s CHK scripts/mod/devicetable-offsets.h UPD scripts/mod/devicetable-offsets.h MKELF scripts/mod/elfconfig.h HOSTCC scripts/mod/modpost.o HOSTCC scripts/mod/sumversion.o HOSTCC scripts/mod/file2alias.o HOSTLD scripts/dtc/dtc HOSTLD scripts/mod/modpost CHK include/generated/timeconst.h CC kernel/bounds.s UPD include/generated/timeconst.h CHK include/generated/bounds.h UPD include/generated/bounds.h CC arch/powerpc/kernel/asm-offsets.s CHK include/generated/asm-offsets.h UPD include/generated/asm-offsets.h CALL /home/kisskb/slave/src/scripts/checksyscalls.sh CC init/main.o CHK include/generated/compile.h CC init/do_mounts.o AR usr/built-in.o CC init/noinitramfs.o CC init/init_task.o UPD include/generated/compile.h CC arch/powerpc/mm/fault.o CC arch/powerpc/mm/mem.o CC arch/powerpc/mm/pgtable.o CC arch/powerpc/mm/mmap.o CC arch/powerpc/mm/init_32.o CC init/version.o CC arch/powerpc/mm/pgtable_32.o CC arch/powerpc/mm/ppc_mmu_32.o CC arch/powerpc/mm/init-common.o AS arch/powerpc/mm/hash_low_32.o CC arch/powerpc/mm/hugetlbpage.o AS arch/powerpc/lib/string.o CC arch/powerpc/lib/alloc.o CC arch/powerpc/mm/tlb_hash32.o AS arch/powerpc/lib/crtsavres.o AS arch/powerpc/lib/div64.o CC arch/powerpc/lib/feature-fixups.o AS arch/powerpc/lib/checksum_32.o CC arch/powerpc/lib/checksum_wrappers.o AS arch/powerpc/lib/copy_32.o CC arch/powerpc/mm/mmu_context_hash32.o CC arch/powerpc/lib/code-patching.o AR arch/powerpc/sysdev/built-in.o CC arch/powerpc/kernel/cputable.o CC arch/powerpc/kernel/ptrace.o CC arch/powerpc/kernel/irq.o CC arch/powerpc/kernel/align.o CC arch/powerpc/kernel/syscalls.o CC arch/powerpc/kernel/vdso.o AR arch/powerpc/platforms/built-in.o CC arch/powerpc/kernel/signal_32.o CC arch/powerpc/kernel/idle.o CC arch/powerpc/kernel/pmc.o CC arch/powerpc/kernel/time.o CC arch/powerpc/kernel/process.o CPP arch/powerpc/kernel/systbl_chk.i CC arch/powerpc/kernel/signal.o CC arch/powerpc/kernel/prom.o CC arch/powerpc/kernel/sysfs.o CC arch/powerpc/kernel/cacheinfo.o AS arch/powerpc/kernel/misc.o CC arch/powerpc/kernel/udbg.o CC arch/powerpc/kernel/dma.o CC arch/powerpc/kernel/io.o CC arch/powerpc/kernel/setup-common.o AS arch/powerpc/kernel/misc_32.o CC arch/powerpc/kernel/of_platform.o CC arch/powerpc/kernel/traps.o CC arch/powerpc/kernel/prom_parse.o AR arch/powerpc/math-emu/built-in.o AR arch/powerpc/kernel/trace/built-in.o AS arch/powerpc/kernel/idle_6xx.o AR arch/powerpc/crypto/built-in.o AS arch/powerpc/kernel/l2cr_6xx.o AS arch/powerpc/kernel/cpu_setup_6xx.o AS arch/powerpc/kernel/entry_32.o CC arch/powerpc/kernel/setup_32.o CC arch/powerpc/kernel/pci-common.o CC arch/powerpc/kernel/pci_32.o CC arch/powerpc/kernel/pci_of_scan.o CC arch/powerpc/kernel/iomap.o AS arch/powerpc/kernel/head_32.o LDS arch/powerpc/kernel/vmlinux.lds AR arch/powerpc/net/built-in.o CALL /home/kisskb/slave/src/arch/powerpc/kernel/systbl_chk.sh AS arch/powerpc/kernel/fpu.o AS arch/powerpc/kernel/systbl.o LDS arch/powerpc/kernel/vdso32/vdso32.lds VDSO32A arch/powerpc/kernel/vdso32/sigtramp.o VDSO32A arch/powerpc/kernel/vdso32/gettimeofday.o VDSO32A arch/powerpc/kernel/vdso32/datapage.o VDSO32A arch/powerpc/kernel/vdso32/cacheflush.o VDSO32A arch/powerpc/kernel/vdso32/note.o AR arch/powerpc/lib/built-in.o AR certs/built-in.o VDSO32L arch/powerpc/kernel/vdso32/vdso32.so.dbg AR init/mounts.o OBJCOPY arch/powerpc/kernel/vdso32/vdso32.so AR init/built-in.o AS arch/powerpc/kernel/vdso32/vdso32_wrapper.o AR ipc/built-in.o CC fs/open.o CC fs/read_write.o CC fs/pipe.o CC fs/super.o CC fs/file_table.o CC 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CC mm/swap_slots.o CC mm/vmacache.o CC kernel/params.o CC kernel/nsproxy.o CC lib/iov_iter.o CC lib/flex_array.o CC kernel/notifier.o CC lib/bsearch.o AR virt/lib/built-in.o CC lib/list_sort.o CC kernel/ksysfs.o CC mm/list_lru.o CC lib/find_bit.o CC kernel/reboot.o CC mm/interval_tree.o CC kernel/cred.o CC kernel/async.o CC mm/workingset.o AR fs/ramfs/built-in.o CC kernel/range.o CC lib/llist.o CC lib/memweight.o AR virt/built-in.o CC kernel/ucount.o CC lib/kfifo.o CC kernel/smpboot.o CC lib/percpu-refcount.o CC lib/percpu_ida.o CC mm/gup.o CC mm/debug.o CC mm/highmem.o CC lib/rhashtable.o CC lib/reciprocal_div.o CC lib/once.o CC lib/refcount.o CC lib/usercopy.o CC lib/errseq.o AR kernel/livepatch/built-in.o CC lib/string_helpers.o AR drivers/amba/built-in.o CC lib/hexdump.o CC kernel/irq/irqdesc.o CC lib/kstrtox.o CC lib/pci_iomap.o CC lib/iomap_copy.o AR drivers/auxdisplay/built-in.o CC kernel/printk/printk.o CC kernel/power/qos.o CC kernel/locking/mutex.o AR fs/built-in.o CC lib/devres.o CC lib/hweight.o CC lib/bitrev.o HOSTCC lib/gen_crc32table CC lib/syscall.o CC mm/memory.o CC kernel/rcu/update.o CC mm/mincore.o CC lib/atomic64.o CC mm/mlock.o CC mm/mmap.o CC kernel/dma.o CC lib/strncpy_from_user.o CC lib/strnlen_user.o CC lib/argv_split.o CC lib/chacha20.o CC mm/mprotect.o CC lib/cmdline.o CC kernel/elfcore.o CC kernel/up.o CC mm/mremap.o CC lib/ctype.o CC kernel/sched/core.o CC drivers/base/component.o CC mm/msync.o CC lib/dec_and_lock.o CC lib/dump_stack.o CC kernel/time/time.o CC lib/decompress.o CC kernel/rcu/sync.o CC mm/page_vma_mapped.o CC kernel/memremap.o CC lib/earlycpio.o CC kernel/time/timer.o CC lib/extable.o CC lib/fdt.o CC mm/pagewalk.o CC lib/fdt_rw.o CC lib/fdt_ro.o CC mm/pgtable-generic.o CC lib/fdt_empty_tree.o CC lib/fdt_strerror.o CC lib/fdt_sw.o CC lib/flex_proportions.o CC lib/idr.o CC lib/fdt_wip.o CC kernel/irq/handle.o CC lib/int_sqrt.o CC lib/ioremap.o CC lib/irq_regs.o CC kernel/irq/manage.o CC mm/rmap.o CC lib/klist.o CC lib/kobject.o CC lib/is_single_threaded.o CC lib/kobject_uevent.o CC lib/nmi_backtrace.o CC kernel/time/hrtimer.o CC lib/nodemask.o CC lib/plist.o AR kernel/printk/built-in.o CC lib/radix-tree.o CC lib/ratelimit.o CC kernel/time/timekeeping.o CC lib/rbtree.o CC lib/seq_buf.o CC lib/sha1.o CC mm/vmalloc.o CC lib/show_mem.o CC kernel/locking/semaphore.o CC lib/siphash.o CC lib/string.o CC lib/vsprintf.o CC lib/timerqueue.o CC lib/win_minmax.o CC kernel/locking/rwsem.o CC kernel/locking/percpu-rwsem.o CC kernel/rcu/tiny.o CC drivers/base/core.o CC kernel/locking/rwsem-xadd.o CC kernel/irq/resend.o CC drivers/base/bus.o CC kernel/irq/spurious.o CC mm/init-mm.o CC kernel/irq/chip.o AR drivers/block/built-in.o CC drivers/base/driver.o CC drivers/base/syscore.o CC drivers/base/dd.o CC drivers/base/platform.o CC drivers/base/class.o AR drivers/bus/built-in.o AR kernel/power/built-in.o GEN lib/crc32table.h CC drivers/base/cpu.o CC drivers/base/firmware.o CC drivers/base/init.o AR drivers/cdrom/built-in.o CC lib/crc32.o CC kernel/time/ntp.o CC kernel/irq/dummychip.o AR drivers/char/ipmi/built-in.o CC kernel/irq/devres.o CC mm/nobootmem.o CC kernel/time/clocksource.o CC mm/memblock.o CC mm/dmapool.o CC mm/slub.o CC drivers/char/random.o CC drivers/char/mem.o CC kernel/irq/irqdomain.o AR drivers/clk/mvebu/built-in.o CC drivers/base/map.o AR drivers/clocksource/built-in.o CC drivers/base/devres.o CC drivers/base/transport_class.o CC drivers/base/attribute_container.o AR drivers/clk/bcm/built-in.o CC drivers/base/topology.o AR drivers/firewire/built-in.o AR drivers/clk/renesas/built-in.o AR drivers/clk/ti/built-in.o CC kernel/time/jiffies.o AR drivers/hwtracing/intel_th/built-in.o AR drivers/clk/built-in.o AR drivers/gpu/vga/built-in.o CC drivers/base/container.o CC drivers/char/misc.o AR drivers/firmware/broadcom/built-in.o AR drivers/char/agp/built-in.o AR drivers/gpu/drm/bridge/synopsys/built-in.o AR drivers/firmware/meson/built-in.o AR drivers/gpu/drm/bridge/built-in.o AR drivers/gpu/drm/hisilicon/built-in.o AR drivers/firmware/tegra/built-in.o AR drivers/gpu/drm/i2c/built-in.o AR drivers/firmware/built-in.o AR drivers/gpu/drm/omapdrm/displays/built-in.o AR drivers/gpu/drm/omapdrm/dss/built-in.o AR drivers/gpu/drm/panel/built-in.o AR drivers/gpu/drm/tilcdc/built-in.o AR drivers/gpu/drm/omapdrm/built-in.o AR drivers/idle/built-in.o CC kernel/sched/loadavg.o AR drivers/i2c/algos/built-in.o CC drivers/irqchip/irqchip.o AR drivers/gpu/drm/built-in.o AR drivers/i2c/busses/built-in.o AR drivers/lguest/built-in.o CC drivers/base/property.o AR drivers/i2c/muxes/built-in.o CC drivers/base/cacheinfo.o AR drivers/i2c/built-in.o AR drivers/base/power/built-in.o CC drivers/base/dma-mapping.o AR drivers/macintosh/built-in.o AR drivers/base/test/built-in.o CC kernel/time/timer_list.o AR drivers/gpu/built-in.o AR kernel/rcu/built-in.o CC kernel/time/timecounter.o CC kernel/time/timeconv.o CC kernel/time/alarmtimer.o CC kernel/sched/clock.o CC kernel/time/posix-stubs.o CC kernel/time/clockevents.o AR drivers/mfd/built-in.o CC kernel/sched/cputime.o AR kernel/locking/built-in.o CC kernel/time/tick-common.o CC kernel/sched/idle_task.o AR drivers/mmc/built-in.o AR drivers/nfc/built-in.o AR drivers/irqchip/built-in.o CC kernel/sched/fair.o CC kernel/sched/rt.o CC kernel/sched/deadline.o CC kernel/sched/wait.o AR drivers/pci/dwc/built-in.o AR drivers/net/phy/built-in.o AR drivers/platform/built-in.o AR drivers/ptp/built-in.o AR drivers/power/built-in.o AR drivers/nvme/host/built-in.o CC kernel/sched/wait_bit.o AR drivers/misc/cb710/built-in.o CC kernel/sched/swait.o CC kernel/sched/completion.o AR drivers/nvme/target/built-in.o AR drivers/pwm/built-in.o AR drivers/net/built-in.o AR drivers/usb/built-in.o AR drivers/nvme/built-in.o AR drivers/media/firewire/built-in.o CC drivers/of/base.o AR drivers/video/backlight/built-in.o AR drivers/misc/eeprom/built-in.o CC drivers/of/device.o AR drivers/tty/ipwireless/built-in.o AR drivers/misc/lis3lv02d/built-in.o AR drivers/soc/bcm/built-in.o CC drivers/of/platform.o CC kernel/sched/idle.o AR drivers/misc/ti-st/built-in.o AR drivers/misc/mic/bus/built-in.o CC drivers/of/property.o AR drivers/soc/fsl/built-in.o AR drivers/soc/renesas/built-in.o AR drivers/media/i2c/soc_camera/built-in.o AR drivers/media/common/b2c2/built-in.o AR drivers/tty/vt/built-in.o CC drivers/pci/access.o AR drivers/tty/serial/built-in.o AR drivers/misc/mic/built-in.o AR drivers/media/mmc/siano/built-in.o AR drivers/soc/built-in.o AR drivers/video/fbdev/core/built-in.o AR drivers/media/i2c/built-in.o CC drivers/pci/bus.o CC drivers/pci/probe.o AR drivers/tty/built-in.o AR drivers/misc/built-in.o AR drivers/media/mmc/built-in.o AR drivers/char/built-in.o AR drivers/media/spi/built-in.o AR drivers/media/tuners/built-in.o AR drivers/media/common/siano/built-in.o AR drivers/media/common/v4l2-tpg/built-in.o AR drivers/media/common/saa7146/built-in.o CC drivers/of/fdt.o CC drivers/of/fdt_address.o CC drivers/pci/host-bridge.o CC drivers/pci/remove.o CC drivers/pci/pci.o CC drivers/pci/pci-driver.o CC drivers/of/address.o CC drivers/pci/search.o CC drivers/of/irq.o CC drivers/of/of_pci.o CC drivers/pci/pci-sysfs.o CC drivers/of/of_pci_irq.o AR drivers/media/rc/keymaps/built-in.o CC drivers/pci/rom.o AR drivers/media/common/built-in.o CC drivers/of/of_reserved_mem.o AR drivers/media/platform/blackfin/built-in.o AR drivers/media/platform/davinci/built-in.o AR drivers/media/rc/built-in.o AR drivers/media/platform/omap/built-in.o AR kernel/irq/built-in.o AR drivers/video/fbdev/omap2/omapfb/displays/built-in.o AR drivers/video/fbdev/omap2/omapfb/dss/built-in.o AR drivers/media/platform/stm32/built-in.o CC drivers/pci/irq.o CC drivers/pci/vpd.o CC drivers/pci/setup-res.o AR drivers/media/pci/b2c2/built-in.o CC drivers/pci/setup-irq.o CC drivers/pci/mmap.o CC drivers/pci/vc.o CC drivers/pci/setup-bus.o AR drivers/video/fbdev/omap2/omapfb/built-in.o CC drivers/pci/syscall.o AR drivers/media/platform/built-in.o AR drivers/media/pci/ddbridge/built-in.o CC drivers/pci/of.o AR mm/built-in.o AR drivers/media/usb/b2c2/built-in.o AR drivers/media/usb/dvb-usb/built-in.o AR drivers/media/pci/dm1105/built-in.o AR drivers/media/pci/ngene/built-in.o AR drivers/media/pci/pluto2/built-in.o AR drivers/media/pci/mantis/built-in.o AR drivers/video/fbdev/omap2/built-in.o AR drivers/media/pci/netup_unidvb/built-in.o AR drivers/pci/host/built-in.o AR drivers/media/pci/pt1/built-in.o AR drivers/media/usb/dvb-usb-v2/built-in.o AR drivers/media/pci/pt3/built-in.o AR drivers/pci/switch/built-in.o AR drivers/media/usb/s2255/built-in.o AR drivers/media/usb/siano/built-in.o AR drivers/media/pci/smipcie/built-in.o AR drivers/media/pci/saa7146/built-in.o AR drivers/media/usb/stkwebcam/built-in.o AR drivers/media/usb/ttusb-budget/built-in.o AR drivers/media/pci/ttpci/built-in.o AR drivers/video/fbdev/built-in.o AR drivers/media/usb/ttusb-dec/built-in.o AR drivers/media/usb/zr364xx/built-in.o AR drivers/media/pci/built-in.o AR drivers/media/usb/built-in.o AR drivers/video/built-in.o AR kernel/sched/built-in.o AR drivers/media/built-in.o AR drivers/of/built-in.o AR kernel/time/built-in.o AR kernel/built-in.o AR drivers/base/built-in.o AR lib/lib.a EXPORTS lib/lib-ksyms.o AR lib/built-in.o AR drivers/pci/built-in.o AR drivers/built-in.o GEN .version CHK include/generated/compile.h UPD include/generated/compile.h CC init/version.o AR init/built-in.o AR built-in.o LD vmlinux.o MODPOST vmlinux.o LD vmlinux SORTEX vmlinux SYSMAP System.map /opt/cross/kisskb/gcc-5.3.0-nolibc/powerpc64-linux/bin/powerpc64-linux-strip -s -R .comment vmlinux -o arch/powerpc/boot/vmlinux.strip make[1]: Leaving directory '/home/kisskb/slave/build/powerpc-fixes_powerpc-allnoconfig_powerpc-5.3' Completed OK # rm -rf /home/kisskb/slave/build/powerpc-fixes_powerpc-allnoconfig_powerpc-5.3 # Build took: 0:00:17.980888