mirror of
https://github.com/torvalds/linux
synced 2024-10-08 04:12:40 +00:00
30a70b026b
phy_power_off() can, depending on the PHY being used, start I2C transactions which shouldn't happen in atomic context. Current call to phy_power_off() inside omap2430_runtime callbacks causes the following dump, as a fix, just don't power off the PHY in runtime. [ 18.606414] [<c037eac0>] (__schedule+0x5c/0x50c) from [<c037d3bc>] (schedule_timeout+0x1f4/0x25c) [ 18.623809] [<c037d3bc>] (schedule_timeout+0x1f4/0x25c) from [<c037f12c>] (wait_for_common+0xc8/0x1ac) [ 18.649291] [<c037f12c>] (wait_for_common+0xc8/0x1ac) from [<c028c1c0>] (omap_i2c_xfer+0x338/0x488) [ 18.674499] [<c028c1c0>] (omap_i2c_xfer+0x338/0x488) from [<c0288144>] (__i2c_transfer+0x40/0x74) [ 18.692047] [<c0288144>] (__i2c_transfer+0x40/0x74) from [<c0288a2c>] (i2c_transfer+0x6c/0x90) [ 18.709320] [<c0288a2c>] (i2c_transfer+0x6c/0x90) from [<c02351c8>] (regmap_i2c_read+0x48/0x68) [ 18.726715] [<c02351c8>] (regmap_i2c_read+0x48/0x68) from [<c023161c>] (_regmap_raw_read+0x128/0x220) [ 18.752685] [<c023161c>] (_regmap_raw_read+0x128/0x220) from [<c02317b4>] (regmap_raw_read+0xa0/0x130) [ 18.779052] [<c02317b4>] (regmap_raw_read+0xa0/0x130) from [<c023193c>] (regmap_bulk_read+0xf8/0x16c) [ 18.805694] [<c023193c>] (regmap_bulk_read+0xf8/0x16c) from [<c0238ea8>] (twl_i2c_read+0xa4/0xe0) [ 18.823730] [<c0238ea8>] (twl_i2c_read+0xa4/0xe0) from [<c0274d34>] (__twl4030_phy_power.isra.12+0x1c/0x58) [ 18.850921] [<c0274d34>] (__twl4030_phy_power.isra.12+0x1c/0x58) from [<c0274df0>] (twl4030_phy_power.part.14+0x80/0xc8) [ 18.879699] [<c0274df0>] (twl4030_phy_power.part.14+0x80/0xc8) from [<c0274f9c>] (twl4030_set_suspend+0x54/0x1e8) [ 18.908325] [<c0274f9c>] (twl4030_set_suspend+0x54/0x1e8) from [<c027c8c4>] (omap2430_runtime_resume+0x5c/0x64) [ 18.937042] [<c027c8c4>] (omap2430_runtime_resume+0x5c/0x64) from [<c0225dd0>] (pm_generic_runtime_resume+0x2c/0x38) [ 18.966461] [<c0225dd0>] (pm_generic_runtime_resume+0x2c/0x38) from [<c0229fe0>] (__rpm_callback+0x54/0x80) [ 18.995117] [<c0229fe0>] (__rpm_callback+0x54/0x80) from [<c022a04c>] (rpm_callback+0x40/0x74) [ 19.013610] [<c022a04c>] (rpm_callback+0x40/0x74) from [<c022b3c8>] (rpm_resume+0x448/0x63c) [ 19.031921] [<c022b3c8>] (rpm_resume+0x448/0x63c) from [<c022b2e4>] (rpm_resume+0x364/0x63c) [ 19.050140] [<c022b2e4>] (rpm_resume+0x364/0x63c) from [<c022b874>] (__pm_runtime_resume+0x48/0x74) [ 19.077728] [<c022b874>] (__pm_runtime_resume+0x48/0x74) from [<c027b4fc>] (musb_gadget_pullup+0x1c/0xb4) [ 19.105895] [<c027b4fc>] (musb_gadget_pullup+0x1c/0xb4) from [<bf025c14>] (usb_function_deactivate+0x54/0xa4 [libcomposite]) [ 19.135955] [<bf025c14>] (usb_function_deactivate+0x54/0xa4 [libcomposite]) from [<bf05b3b8>] (obex_bind+0x124/0x1d8 [usb_f_obex]) [ 19.166870] [<bf05b3b8>] (obex_bind+0x124/0x1d8 [usb_f_obex]) from [<bf025794>] (usb_add_function+0x58/0xf4 [libcomposite]) [ 19.197143] [<bf025794>] (usb_add_function+0x58/0xf4 [libcomposite]) from [<bf037420>] (nokia_bind_config+0x204/0x250 [g_nokia]) [ 19.227905] [<bf037420>] (nokia_bind_config+0x204/0x250 [g_nokia]) from [<bf0263fc>] (usb_add_config+0x28/0xc0 [libcomposite]) [ 19.258483] [<bf0263fc>] (usb_add_config+0x28/0xc0 [libcomposite]) from [<bf03709c>] (nokia_bind+0x9c/0x21c [g_nokia]) [ 19.288421] [<bf03709c>] (nokia_bind+0x9c/0x21c [g_nokia]) from [<bf0275bc>] (composite_bind+0x74/0x180 [libcomposite]) [ 19.318420] [<bf0275bc>] (composite_bind+0x74/0x180 [libcomposite]) from [<c027d658>] (udc_bind_to_driver+0x2c/0xc4) [ 19.348114] [<c027d658>] (udc_bind_to_driver+0x2c/0xc4) from [<c027d764>] (usb_gadget_probe_driver+0x74/0x94) [ 19.377166] [<c027d764>] (usb_gadget_probe_driver+0x74/0x94) from [<c00086f8>] (do_one_initcall+0x94/0x138) [ 19.406005] [<c00086f8>] (do_one_initcall+0x94/0x138) from [<c007a460>] (load_module+0x113c/0x13c4) [ 19.434051] [<c007a460>] (load_module+0x113c/0x13c4) from [<c007a7b4>] (SyS_init_module+0xcc/0xec) [ 19.462127] [<c007a7b4>] (SyS_init_module+0xcc/0xec) from [<c000dd40>] (ret_fast_syscall+0x0/0x30) [ 19.490753] Code: 0a00002e e1a00004 eb001438 e598300c (e5d3202c) [ 19.506805] ---[ end trace 060b62ec0d68a78b ]--- [ 19.523132] Kernel panic - not syncing: Fatal exception in interrupt dump is from 3.12-rc5 kernel Reported-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> Signed-off-by: Felipe Balbi <balbi@ti.com> |
||
---|---|---|
.. | ||
atm | ||
c67x00 | ||
chipidea | ||
class | ||
core | ||
dwc2 | ||
dwc3 | ||
early | ||
gadget | ||
host | ||
image | ||
misc | ||
mon | ||
musb | ||
phy | ||
renesas_usbhs | ||
serial | ||
storage | ||
wusbcore | ||
Kconfig | ||
Makefile | ||
README | ||
usb-common.c | ||
usb-skeleton.c |
To understand all the Linux-USB framework, you'll use these resources: * This source code. This is necessarily an evolving work, and includes kerneldoc that should help you get a current overview. ("make pdfdocs", and then look at "usb.pdf" for host side and "gadget.pdf" for peripheral side.) Also, Documentation/usb has more information. * The USB 2.0 specification (from www.usb.org), with supplements such as those for USB OTG and the various device classes. The USB specification has a good overview chapter, and USB peripherals conform to the widely known "Chapter 9". * Chip specifications for USB controllers. Examples include host controllers (on PCs, servers, and more); peripheral controllers (in devices with Linux firmware, like printers or cell phones); and hard-wired peripherals like Ethernet adapters. * Specifications for other protocols implemented by USB peripheral functions. Some are vendor-specific; others are vendor-neutral but just standardized outside of the www.usb.org team. Here is a list of what each subdirectory here is, and what is contained in them. core/ - This is for the core USB host code, including the usbfs files and the hub class driver ("khubd"). host/ - This is for USB host controller drivers. This includes UHCI, OHCI, EHCI, and others that might be used with more specialized "embedded" systems. gadget/ - This is for USB peripheral controller drivers and the various gadget drivers which talk to them. Individual USB driver directories. A new driver should be added to the first subdirectory in the list below that it fits into. image/ - This is for still image drivers, like scanners or digital cameras. ../input/ - This is for any driver that uses the input subsystem, like keyboard, mice, touchscreens, tablets, etc. ../media/ - This is for multimedia drivers, like video cameras, radios, and any other drivers that talk to the v4l subsystem. ../net/ - This is for network drivers. serial/ - This is for USB to serial drivers. storage/ - This is for USB mass-storage drivers. class/ - This is for all USB device drivers that do not fit into any of the above categories, and work for a range of USB Class specified devices. misc/ - This is for all USB device drivers that do not fit into any of the above categories.