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OpenCloudOS-Kernel/drivers/pinctrl
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Julia Cartwright 47b03ca903 pinctrl: qcom: Use raw spinlock variants 
The MSM pinctrl driver currently implements an irq_chip for handling
GPIO interrupts; due to how irq_chip handling is done, it's necessary
for the irq_chip methods to be invoked from hardirq context, even on a
a real-time kernel.  Because the spinlock_t type becomes a "sleeping"
spinlock w/ RT kernels, it is not suitable to be used with irq_chips.

A quick audit of the operations under the lock reveal that they do only
minimal, bounded work, and are therefore safe to do under a raw
spinlock.

On real-time kernels, this fixes an OOPs which looks like the following,
as reported by Brian Wrenn:

    kernel BUG at kernel/locking/rtmutex.c:1014!
    Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
    Modules linked in: spidev_irq(O) smsc75xx wcn36xx [last unloaded: spidev]
    CPU: 0 PID: 1163 Comm: irq/144-mmc0 Tainted: G        W  O    4.4.9-linaro-lt-qcom #1
    PC is at rt_spin_lock_slowlock+0x80/0x2d8
    LR is at rt_spin_lock_slowlock+0x68/0x2d8
    [..]
  Call trace:
    rt_spin_lock_slowlock
    rt_spin_lock
    msm_gpio_irq_ack
    handle_edge_irq
    generic_handle_irq
    msm_gpio_irq_handler
    generic_handle_irq
    __handle_domain_irq
    gic_handle_irq

Reported-by: Brian Wrenn <dcbrianw@gmail.com>
Tested-by: Brian Wrenn <dcbrianw@gmail.com>
Signed-off-by: Julia Cartwright <julia@ni.com>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 		2017-01-26 11:06:15 +01:00
..
aspeed pinctrl: aspeed: Fix kerneldoc return descriptions 2016-12-28 01:23:10 +01:00
bcm ARM: DT updates for v4.10 2016-12-15 15:50:24 -08:00
berlin pinctrl: berlin: Use devm_pinctrl_register() for pinctrl registration 2016-04-21 00:02:13 +02:00
freescale pinctrl: core: Fix regression caused by delayed work for hogs 2017-01-13 16:25:17 +01:00
intel pinctrl: baytrail: Convert to use devm_*() 2017-01-11 14:13:53 +01:00
mediatek pinctrl: update my email address 2016-12-30 09:17:02 +01:00
meson pinctrl: meson: Add HDMI HPD/DDC pins functions 2017-01-18 13:27:30 +01:00
mvebu pinctrl: mvebu: add simple regmap based pinctrl implementation 2017-01-18 09:58:04 +01:00
nomadik pinctrl: nomadik: split up and comments MC0 pins 2016-11-18 09:54:32 +01:00
pxa pinctrl: pxa: Use devm_pinctrl_register() for pinctrl registration 2016-04-21 00:03:04 +02:00
qcom pinctrl: qcom: Use raw spinlock variants 2017-01-26 11:06:15 +01:00
samsung pinctrl: samsung: Fix samsung_pinctrl_create_functions return value 2017-01-26 10:05:54 +01:00
sh-pfc pinctrl: sh-pfc: Updates for v4.11 2017-01-13 16:43:17 +01:00
sirf pinctrl: sirf: atlas7: Improve code layout 2016-12-30 09:14:55 +01:00
spear pinctrl: spear: Use devm_pinctrl_register() for pinctrl registration 2016-04-21 00:03:18 +02:00
stm32 pinctrl: stm32: activate strict mux mode 2016-12-30 09:06:39 +01:00
sunxi pinctrl: sunxi: add driver for V3s SoC 2017-01-11 16:23:47 +01:00
tegra This is the bulk of pin control changes for the v4.8 kernel cycle. 2016-07-28 17:06:51 -07:00
ti pinctrl: ti-iodelay: remove redundant pin < 0 check on unsigned int 2017-01-18 10:23:37 +01:00
uniphier pinctrl: uniphier: add Ethernet pin-mux settings 2016-07-11 09:53:25 +02:00
vt8500 pinctrl: vt8500: make bool drivers explicitly non-modular 2016-11-15 10:04:20 +01:00
Kconfig pinctrl: Introduce TI IOdelay configuration driver 2017-01-09 19:43:21 +01:00
Makefile pinctrl: Introduce TI IOdelay configuration driver 2017-01-09 19:43:21 +01:00
core.c pinctrl: Initialize pinctrl_dev.node 2017-01-13 16:30:52 +01:00
core.h pinctrl: core: Fix regression caused by delayed work for hogs 2017-01-13 16:25:17 +01:00
devicetree.c pinctrl: core: Make dt_free_map optional 2017-01-09 19:41:07 +01:00
devicetree.h pinctrl: core: Use delayed work for hogs 2017-01-03 09:26:16 +01:00
pinconf-generic.c pinctrl: generic: Parse pinmux init nodes if node status is okay 2016-10-29 10:31:58 +02:00
pinconf.c pinctrl: pinconf: separate config parameters with commas for debugfs 2016-05-31 10:29:06 +02:00
pinconf.h pinctrl: pinconf-generic: Allow driver to specify DT params 2015-01-11 22:32:19 +01:00
pinctrl-adi2-bf54x.c pinctrl: pinctrl-adi: combine multiple groups of one function together 2014-02-25 10:49:13 +01:00
pinctrl-adi2-bf60x.c added tabs instead of spaces 2015-07-16 09:39:01 +02:00
pinctrl-adi2.c pinctrl: adi2: Use devm_pinctrl_register() for pinctrl registration 2016-04-21 09:23:20 +02:00
pinctrl-adi2.h pinctrl: pinctrl-adi: combine multiple groups of one function together 2014-02-25 10:49:13 +01:00
pinctrl-amd.c pinctrl/amd: Drop pinctrl_unregister for devm_ registered device 2017-01-19 00:15:09 +01:00
pinctrl-amd.h pinctrl: amd: Add support for additional GPIO 2016-12-28 13:26:09 +01:00
pinctrl-as3722.c pinctrl: as3722: Use devm_pinctrl_register() for pinctrl registration 2016-04-21 09:23:21 +02:00
pinctrl-at91-pio4.c pinctrl: at91-pio4: make it explicitly non-modular 2016-06-13 08:40:14 +02:00
pinctrl-at91.c pinctrl: at91: add support for OUTPUT config 2016-10-31 09:16:46 +01:00
pinctrl-at91.h pinctrl: at91: use own header 2014-10-29 09:28:35 +01:00
pinctrl-coh901.c pinctrl: coh901: fix initconst annotation 2016-02-15 20:40:52 +01:00
pinctrl-coh901.h
…
pinctrl-da850-pupd.c pinctrl: da850-pupd: Add to module device table 2017-01-11 14:28:28 +01:00
pinctrl-digicolor.c Revert "pinctrl: digicolor: add missing platform_set_drvdata() call" 2016-06-23 09:50:05 +02:00
pinctrl-falcon.c pinctrl: update my email address 2016-12-30 09:17:02 +01:00
pinctrl-lantiq.c pinctrl: update my email address 2016-12-30 09:17:02 +01:00
pinctrl-lantiq.h pinctrl: update my email address 2016-12-30 09:17:02 +01:00
pinctrl-lpc18xx.c pinctrl: lpc18xx: make it explicitly non-modular 2016-06-13 08:28:18 +02:00
pinctrl-max77620.c pinctrl: max77620: Remove unused structure definition 2016-06-15 08:37:40 +02:00
pinctrl-oxnas.c pinctrl: oxnas: Add support for OX820 2016-10-24 16:30:14 +02:00
pinctrl-palmas.c pinctrl: palmas: fix a possible NULL dereference 2016-08-22 14:11:00 +02:00
pinctrl-pic32.c pinctrl: pic32: Use devm_pinctrl_register() for pinctrl registration 2016-04-21 09:23:24 +02:00
pinctrl-pic32.h pinctrl: pinctrl-pic32: Add PIC32 pin control driver 2016-02-05 23:54:47 +01:00
pinctrl-pistachio.c pinctrl: pistachio: fix mfio pll_lock pinmux 2016-08-22 15:28:35 +02:00
pinctrl-rockchip.c pinctrl: rockchip: add support for rk1108 2016-11-16 20:34:00 +01:00
pinctrl-single.c pinctrl: core: Fix regression caused by delayed work for hogs 2017-01-13 16:25:17 +01:00
pinctrl-st.c Bulk pin control changes for the v4.10 kernel cycle: 2016-12-13 07:59:10 -08:00
pinctrl-sx150x.c pinctrl: sx150x: use new nested IRQ infrastructure 2016-12-07 16:02:55 +01:00
pinctrl-tb10x.c pinctrl: tb10x: Use devm_pinctrl_register() for pinctrl registration 2016-04-21 09:23:25 +02:00
pinctrl-tz1090-pdc.c pinctrl: tz1090-pdc: Use devm_pinctrl_register() for pinctrl registration 2016-04-21 09:23:26 +02:00
pinctrl-tz1090.c pinctrl: tz1090 Use devm_pinctrl_register() for pinctrl registration 2016-04-21 09:23:26 +02:00
pinctrl-u300.c pinctrl: u300: make u300_pmx_registers static 2016-06-13 09:27:43 +02:00
pinctrl-utils.c pinctrl: Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map 2016-04-01 15:06:36 +02:00
pinctrl-utils.h pinctrl: Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map 2016-04-01 15:06:36 +02:00
pinctrl-xway.c pinctrl: update my email address 2016-12-30 09:17:02 +01:00
pinctrl-zynq.c pinctrl: zynq: Add a 8 bit wide nand option 2016-11-04 15:19:00 +01:00
pinmux.c pinctrl: core: Add generic pinctrl functions for managing groups 2017-01-03 09:26:18 +01:00
pinmux.h pinctrl: core: Add generic pinctrl functions for managing groups 2017-01-03 09:26:18 +01:00