Rob Herring
25b4e70dcc
driver core: allow stopping deferred probe after init ...
Deferred probe will currently wait forever on dependent devices to probe,
but sometimes a driver will never exist. It's also not always critical for
a driver to exist. Platforms can rely on default configuration from the
bootloader or reset defaults for things such as pinctrl and power domains.
This is often the case with initial platform support until various drivers
get enabled. There's at least 2 scenarios where deferred probe can render
a platform broken. Both involve using a DT which has more devices and
dependencies than the kernel supports. The 1st case is a driver may be
disabled in the kernel config. The 2nd case is the kernel version may
simply not have the dependent driver. This can happen if using a newer DT
(provided by firmware perhaps) with a stable kernel version. Deferred
probe issues can be difficult to debug especially if the console has
dependencies or userspace fails to boot to a shell.
There are also cases like IOMMUs where only built-in drivers are
supported, so deferring probe after initcalls is not needed. The IOMMU
subsystem implemented its own mechanism to handle this using OF_DECLARE
linker sections.
This commit adds makes ending deferred probe conditional on initcalls
being completed or a debug timeout. Subsystems or drivers may opt-in by
calling driver_deferred_probe_check_init_done() instead of
unconditionally returning -EPROBE_DEFER. They may use additional
information from DT or kernel's config to decide whether to continue to
defer probe or not.
The timeout mechanism is intended for debug purposes and WARNs loudly.
The remaining deferred probe pending list will also be dumped after the
timeout. Not that this timeout won't work for the console which needs
to be enabled before userspace starts. However, if the console's
dependencies are resolved, then the kernel log will be printed (as
opposed to no output).
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-10 17:22:35 +02:00
Merge branches 'acpi-soc' and 'acpi-processor'
2018-06-21 14:19:08 +02:00
Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
2018-06-06 13:49:25 -07:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
driver core: allow stopping deferred probe after init
2018-07-10 17:22:35 +02:00
dma-mapping updates for 4.18:
2018-06-04 10:58:12 -07:00
for-linus-20180623
2018-06-24 06:33:54 +08:00
bluetooth: hci_nokia: Don't include linux/unaligned/le_struct.h directly.
2018-06-17 08:38:55 +09:00
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2018-06-24 06:31:54 +08:00
docs: Fix some broken references
2018-06-15 18:10:01 -03:00
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-24 19:16:42 +08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2018-06-06 18:39:49 -07:00
cpufreq: intel_pstate: Fix scaling max/min limits with Turbo 3.0
2018-06-19 10:40:29 +02:00
powerpc updates for 4.18
2018-06-07 10:23:33 -07:00
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2018-06-24 06:31:54 +08:00
libnvdimm for 4.18
2018-06-08 17:21:52 -07:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
efi/libstub/tpm: Initialize efi_physical_addr_t vars to zero for mixed mode
2018-06-22 10:58:27 +02:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
Fixes for v4.18-rc2:
2018-06-22 11:03:43 +10:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
2018-06-20 16:42:39 +09:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
hwmon: (nct6775) Fix loop limit
2018-06-16 16:40:36 -07:00
hwspinlock updates for v4.18
2018-06-11 12:09:19 -07:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2018-06-14 16:21:46 +09:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
4.18-rc
2018-06-21 07:22:30 +09:00
docs: Fix some broken references
2018-06-15 18:10:01 -03:00
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
irqchip/gic-v3-its: Fix reprogramming of redistributors on CPU hotplug
2018-06-22 14:22:02 +02:00
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
for-linus-20180623
2018-06-24 06:33:54 +08:00
powerpc updates for 4.18
2018-06-07 10:23:33 -07:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
docs: Fix some broken references
2018-06-15 18:10:01 -03:00
Solve a series of broken links for files under Documentation:
2018-06-17 05:25:18 +09:00
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2018-06-14 16:21:46 +09:00
Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2018-06-14 16:21:46 +09:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2018-06-21 07:13:42 +09:00
treewide: devm_kmalloc() -> devm_kmalloc_array()
2018-06-12 16:19:22 -07:00
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
Char/Misc driver patches for 4.18-rc1
2018-06-05 16:20:22 -07:00
Merge branch 'for-4.18/mcsafe' into libnvdimm-for-next
2018-06-08 15:16:44 -07:00
nvme-pci: limit max IO size and segments to avoid high order allocations
2018-06-21 18:59:46 +02:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
PM / OPP: Update voltage in case freq == old_freq
2018-06-19 15:53:32 +05:30
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
dma-mapping updates for 4.18:
2018-06-04 10:58:12 -07:00
docs: Fix some broken references
2018-06-15 18:10:01 -03:00
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2018-06-06 18:39:49 -07:00
pinctrl: mt7622: fix a kernel panic when pio don't work as EINT controller
2018-06-18 07:55:57 +02:00
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
media updates for v4.18-rc1
2018-06-07 12:34:37 -07:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
ptp: replace getnstimeofday64() with ktime_get_real_ts64()
2018-06-20 07:59:53 +09:00
pwm: Changes for v4.18-rc1
2018-06-14 16:25:43 +09:00
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
treewide: use PHYS_ADDR_MAX to avoid type casting ULLONG_MAX
2018-06-15 07:55:25 +09:00
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
rpmsg: smd: do not use mananged resources for endpoints and channels
2018-06-04 12:35:03 -07:00
- New Device Support
2018-06-11 07:20:17 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2018-06-19 07:44:51 +09:00
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
for-linus-20180623
2018-06-24 06:33:54 +08:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
treewide: use PHYS_ADDR_MAX to avoid type casting ULLONG_MAX
2018-06-15 07:55:25 +09:00
docs: Fix more broken references
2018-06-15 18:11:26 -03:00
treewide: devm_kzalloc() -> devm_kcalloc()
2018-06-12 16:19:22 -07:00
media: v4l: fix broken video4linux docs locations
2018-06-15 18:10:01 -03:00
treewide: Use array_size() in vzalloc()
2018-06-12 16:19:22 -07:00
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
VFIO updates for v4.18
2018-06-12 13:11:26 -07:00
virtio, vhost: features, fixes
2018-06-16 06:35:02 +09:00
Solve a series of broken links for files under Documentation:
2018-06-17 05:25:18 +09:00
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
virtio, vhost: features, fixes
2018-06-16 06:35:02 +09:00
Char/Misc driver patches for 4.18-rc1
2018-06-05 16:20:22 -07:00
MIPS changes for 4.18
2018-06-12 12:56:02 -07:00
xen: fixes for 4.18-rc2
2018-06-23 20:44:11 +08:00
- Introduce arithmetic overflow test helper functions (Rasmus)
2018-06-06 17:27:14 -07:00
25b4e70dcc