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c8ed99d4f6
linux/drivers
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Chen-Yu Tsai c8ed99d4f6 serial: 8250_dw: Add support for deferred probing 
The 8250_dw driver fails to probe if the specified clock isn't
registered at probe time. Even if a clock frequency is given,
the required clock might be gated because it wasn't properly
enabled.

This happened to me when the device is registered through DT,
and the clock was part of an MFD, the PRCM found on A31 and A23
SoCs. Unlike core clocks that are registered with OF_CLK_DECLARE,
which happen almost immediately after the kernel starts, the
clocks are registered as sub-devices of the PRCM MFD platform
device. Even though devices are registered in the order they are
found in the DT, the drivers are registered in a different,
arbitrary order. It is possible that the 8250_dw driver is
registered, and thus associated with the device and probed, before
the clock driver is registered and probed.

8250_dw then reports unable to get the clock, and fails. Without
a working console, the kernel panics.

This patch adds support for deferred probe handling for the clock
and reset controller. It also fixes the cleanup path if
serial8250_register_8250_port fails.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-27 11:07:08 -07:00
..
accessibility
acpi Merge branch 'acpi-video' 2014-07-10 21:04:25 +02:00
amba
ata ahci_xgene: fix the dma state machine lockup for the IDENTIFY DEVICE PIO mode command. 2014-07-08 11:46:05 -04:00
atm atm: fore200e.c: Cleaning up uninitialized variables 2014-06-02 17:11:03 -07:00
auxdisplay
base DMA, CMA: fix possible memory leak 2014-06-23 16:47:44 -07:00
bcma
block zram: revalidate disk after capacity change 2014-07-03 09:21:53 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
bus bus/arm-cci: add dependency on OF && CPU_V7 2014-06-17 17:09:35 +02:00
cdrom Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2014-06-11 08:41:17 -07:00
char Merge 3.16-rc5 into tty-next. 2014-07-13 15:52:12 -07:00
clk This batch of fixes is for a handful of clock drivers from Allwinner, 2014-07-13 12:21:04 -07:00
clocksource clocksource: exynos_mct: Register the timer for stable udelay 2014-07-05 06:40:23 +09:00
connector Char / misc driver patches for 3.16-rc1 2014-06-03 08:06:56 -07:00
cpufreq cpufreq: Makefile: fix compilation for davinci platform 2014-07-09 02:54:15 +02:00
cpuidle cpuidle: mvebu: Fix the name of the states 2014-06-18 21:54:46 +02:00
crypto crypto: caam - fix memleak in caam_jr module 2014-07-10 16:59:13 +08:00
dca
devfreq
dio
dma Update imx-sdma cyclic handling to report residue 2014-07-01 12:23:42 +05:30
edac PCI changes for the v3.16 merge window: 2014-06-02 12:15:19 -07:00
eisa
extcon
firewire sound updates for 3.16-rc1 2014-06-04 09:08:25 -07:00
firmware efi-pstore: Fix an overflow on 32-bit builds 2014-06-27 07:30:32 +01:00
fmc
gpio gpio: of: Fix handling for deferred probe for -gpio suffix 2014-06-12 09:57:00 +02:00
gpu Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux 2014-07-10 20:37:33 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-07-07 13:13:03 -07:00
hsi hsi: omap_ssi_port: use normal module refcounting 2014-06-05 00:59:05 +02:00
hv Drivers: hv: util: Fix a bug in the KVP code 2014-07-09 14:34:35 -07:00
hwmon hwmon: (adc128d818) Drop write support on inX_input attributes 2014-07-07 09:48:23 -07:00
hwspinlock
i2c i2c: sun6i-p2wi: Remove duplicate inclusion of module.h 2014-06-27 14:39:36 +02:00
ide
idle
iio iio: ti_am335x_adc: Fix: Use same step id at FIFOs both ends 2014-07-08 21:21:22 +01:00
infiniband Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-06-12 22:38:32 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-06-09 18:46:02 -07:00
iommu iommu/amd: Fix small race between invalidate_range_end/start 2014-06-20 16:14:22 +02:00
ipack
irqchip irqchip: spear_shirq: Fix interrupt offset 2014-06-21 23:26:39 +00:00
isdn isdn: hisax: Drop duplicate Kconfig entry 2014-06-16 21:31:37 -07:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-06-12 13:08:09 -07:00
lguest
macintosh powerpc/macintosh/smu.c: Fix closing brace followed by if 2014-06-24 12:43:15 +10:00
mailbox
mcb
md . Fix DM multipath IO hang regression from 3.15 due to logic bug in 2014-07-11 09:33:36 -07:00
media Merge branch 'topic/omap3isp' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2014-06-12 23:04:28 -07:00
memory
memstick drivers/memstick/host/rtsx_pci_ms.c: add cancel_work when remove driver 2014-06-23 16:47:44 -07:00
message
mfd mfd: ab8500: Fix dt irq mapping 2014-06-26 13:34:15 +01:00
misc ARM: SoC fixes for 3.16 2014-06-25 12:19:01 -07:00
mmc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
mtd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-06-12 10:30:18 -07:00
net net: allwinner: emac: Add missing free_irq 2014-06-25 16:31:17 -07:00
nfc
ntb
nubus kernel/printk: use symbolic defines for console loglevels 2014-06-04 16:54:17 -07:00
of Devicetree bugfixe for v3.16 2014-07-06 12:11:57 -07:00
oprofile
parisc
parport parport: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:15 -07:00
pci PCI: Fix unaligned access in AF transaction pending test 2014-06-17 15:40:13 -06:00
pcmcia
phy USB fixes for 3.16-rc5 2014-07-12 14:13:10 -07:00
pinctrl pinctrl: berlin: fix an error code in berlin_pinctrl_probe() 2014-07-05 01:15:35 +02:00
platform Merge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86 2014-06-10 16:58:32 -07:00
pnp Merge branches 'pnp', 'powercap', 'pm-runtime' and 'pm-opp' 2014-06-03 23:13:00 +02:00
power ACPI and power management updates for 3.16-rc1 2014-06-04 08:57:16 -07:00
powercap
pps
ps3
ptp ptp: ptp_pch depends on x86_32 2014-06-17 15:43:48 -07:00
pwm pwm: Changes for v3.16-rc1 2014-06-11 14:06:55 -07:00
rapidio rapidio/tsi721: use pci_enable_msix_exact() instead of pci_enable_msix() 2014-06-06 16:08:13 -07:00
regulator Merge remote-tracking branches 'regulator/fix/bcm590xx', 'regulator/fix/palmas' and 'regulator/fix/tps65218' into regulator-linus 2014-06-28 14:01:04 +01:00
remoteproc remoteproc: da8xx: don't select CMA on no-MMU 2014-06-17 17:09:36 +02:00
reset ARM: SoC driver changes 2014-06-02 16:35:49 -07:00
rpmsg
rtc drivers/rtc/rtc-puv3.c: remove "&dev->" for typo issue MIME-Version: 1.0 2014-06-20 08:22:39 +08:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-06-21 06:47:01 -10:00
sbus
scsi SCSI for-linus on 20140705 2014-07-06 12:08:30 -07:00
sfi
sh SH Driver Update for v3.16 2014-06-06 11:44:09 -07:00
sn
soc
spi Merge remote-tracking branches 'spi/fix/pxa2xx', 'spi/fix/qup' and 'spi/fix/sh-sci' into spi-linus 2014-06-28 14:01:23 +01:00
spmi
ssb
staging tty: Remove tty_hung_up_p() tests from tty drivers' open() 2014-07-10 16:06:49 -07:00
target iscsi-target: fix iscsit_del_np deadlock on unload 2014-06-27 23:23:35 -07:00
tc TC: Handle device_register() errors. 2014-06-26 10:48:23 +01:00
thermal thermal: ti-soc-thermal: ti-bandgap.c: Cleaning up wrong address is checked 2014-07-01 09:52:35 +08:00
tty serial: 8250_dw: Add support for deferred probing 2014-07-27 11:07:08 -07:00
uio Revert "uio: fix vma io range check in mmap" 2014-06-17 16:07:08 -07:00
usb USB: serial: ftdi_sio: Add Infineon Triboard 2014-07-11 18:22:38 -07:00
uwb
vfio A handful of VFIO bug fixes for v3.16 2014-06-07 20:12:15 -07:00
vhost vhost-scsi: don't open-code kvfree 2014-06-23 09:22:48 +03:00
video fb: adv7393: add missing semicolon 2014-07-01 13:18:38 +03:00
virt
virtio
vlynq
vme
w1 w1: mxc_w1: Fix incorrect "presence" status 2014-06-19 17:51:46 -07:00
watchdog Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-06-21 06:47:01 -10:00
xen xen: regression and PVH fixes for 3.16-rc1 2014-06-19 07:53:27 -10:00
zorro
Kconfig
Makefile Char / misc driver patches for 3.16-rc1 2014-06-03 08:06:56 -07:00