Hi Felipe,
A proper answer required some instrumentation printks().
So what I did is that I peppered each function marked with a removed
__init or __devinit with a
> printk(KERN_INFO "%s:%d (%s) %s\n", __FILE__, __LINE__, KBUILD_MODNAME,
> __func__);
>
Both omap2430 & musb_hdrc are compiled as module, and I issued the following
commands on a beagleboard xm.
# modprobe omap2430
# modprobe g_mass_storage file=backing_file
# rmmod g_mass_storage
# rmmod omap2430
# modprobe omap2430
The problem is obvious when you see that functions marked as init or devinit are
called when re-loading the omap2430 module again. Those functions if marked as
much can (and will as I have witnessed) be removed from memory, leading to a
crash.
What do you think?
Regards
-- Pantelis
On Sep 6, 2012, at 4:04 PM, Felipe Balbi wrote:
> On Thu, Sep 06, 2012 at 05:01:46PM +0300, Pantelis Antoniou wrote:
>> Marking functions as __init or __devinit and calling them at other times
>> leads to predictable crashes (if you're lucky).
>>
>> Remove them for now.
>>
>> Signed-off-by: Pantelis Antoniou <pa...@antoniou-consulting.com>
>> ---
>> drivers/usb/musb/musb_core.c | 16 ++++++++--------
>> drivers/usb/musb/musb_debugfs.c | 2 +-
>> drivers/usb/musb/musb_dma.h | 2 +-
>> drivers/usb/musb/musb_gadget.c | 6 +++---
>> drivers/usb/musb/musbhsdma.c | 2 +-
>> drivers/usb/musb/omap2430.c | 2 +-
>> 6 files changed, 15 insertions(+), 15 deletions(-)
>>
>> diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
>> index 26f1bef..215d2d5 100644
>> --- a/drivers/usb/musb/musb_core.c
>> +++ b/drivers/usb/musb/musb_core.c
>> @@ -1160,7 +1160,7 @@ static struct musb_fifo_cfg __devinitdata mode_5_cfg[]
>> = {
>> *
>> * returns negative errno or offset for next fifo.
>> */
>> -static int __devinit
>> +static int
>> fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep,
>> const struct musb_fifo_cfg *cfg, u16 offset)
>
> Are you sure all these functions are called from outside .init.text ? At
> least fifo_setup(), ep_config_from_table() and musb_core_init() are only
> during probe(), which sits in .init.text too.
>
> --
> balbi
Log...
> root@beagleboard:~# modprobe omap2430
> [ 114.643920] drivers/usb/musb/omap2430.c:584 (omap2430) omap2430_init
> [ 114.650939] drivers/usb/musb/omap2430.c:445 (omap2430) omap2430_probe
> [ 114.792205] drivers/usb/musb/musb_core.c:2409 (musb_hdrc) musb_init
> [ 114.798889] musb-hdrc: version 6.0, ?dma?, otg (peripheral+host)
> [ 114.805358] drivers/usb/musb/musb_core.c:2118 (musb_hdrc) musb_probe
> [ 114.812225] drivers/usb/musb/musb_core.c:1888 (musb_hdrc)
> musb_init_controller
> [ 114.819824] drivers/usb/musb/musb_core.c:1813 (musb_hdrc) allocate_instance
> [ 114.835723] twl4030_usb twl4030_usb: twl4030_phy_resume
> [ 114.841339] drivers/usb/musb/musbhsdma.c:391 (musb_hdrc)
> dma_controller_create
> [ 114.848999] drivers/usb/musb/musb_core.c:1388 (musb_hdrc) musb_core_init
> [ 114.856079] musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine,
> bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
> [ 114.867095] musb-hdrc: MHDRC RTL version 1.800
> [ 114.871887] drivers/usb/musb/musb_core.c:1246 (musb_hdrc)
> ep_config_from_table
> [ 114.879486] musb-hdrc: setup fifo_mode 4
> [ 114.883666] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.890319] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.897033] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.903686] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.910369] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.917083] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.923767] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.930480] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.937133] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.943817] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.950500] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.957183] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.963867] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.970550] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.977264] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.983947] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.990631] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 114.997314] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.003997] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.010711] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.017395] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.024078] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.030761] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.037475] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.044158] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.050842] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.057556] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.064239] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 115.070922] musb-hdrc: 28/31 max ep, 16384/16384 memory
> [ 115.076599] drivers/usb/musb/musb_gadget.c:1879 (musb_hdrc)
> musb_gadget_setup
> [ 115.084136] drivers/usb/musb/musb_gadget.c:1842 (musb_hdrc)
> musb_g_init_endpoints
> [ 115.092010] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.099609] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.107238] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.114837] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.122406] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.130035] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.137634] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.145233] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.152832] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.160461] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.168060] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.175689] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.183288] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.190948] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.198516] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.206146] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.213775] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.221374] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.229003] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.236633] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.244232] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.251861] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.259460] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.267089] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.274688] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.282287] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.289916] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.297546] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 115.307617] musb-hdrc musb-hdrc: USB OTG mode controller at fa0ab000 using
> DMA, IRQ 92
> [ 115.324279] twl4030_usb twl4030_usb: twl4030_phy_suspend
>
> root@beagleboard:~# lsmod
> Module Size Used by
> musb_hdrc 53393 0
> omap2430 5518 0
> root@beagleboard:~# modprobe g_mass_storage file=backing_file
> [ 138.156799] udc musb-hdrc: registering UDC driver [g_mass_storage]
> [ 138.163330] gadget: adding config #1 'Linux File-Backed Storage'/bf0217e8
> [ 138.171966] lun0: open backing file: backing_file
> [ 138.182464] gadget: Mass Storage Function, version: 2009/09/11
> [ 138.188812] gadget: Number of LUNs=1
> [ 138.192901] lun0: LUN: file: /home/root/backing_file
> [ 138.198272] gadget: I/O thread pid: 1976
> [ 138.202484] gadget: adding 'Mass Storage Function'/ddda81c0 to config
> 'Linux File-Backed Storage'/bf0217e8
> [ 138.212799] gadget: cfg 1/bf0217e8 speeds: high full
> [ 138.218109] gadget: interface 0 = Mass Storage Function/ddda81c0
> [ 138.224731] gadget: Mass Storage Gadget, version: 2009/09/11
> [ 138.230804] gadget: userspace failed to provide iSerialNumber
> [ 138.236968] gadget: g_mass_storage ready[ 138.252227] twl4030_usb
> twl4030_usb: twl4030_phy_resume
> [ 138.252441] musb-hdrc musb-hdrc: MUSB HDRC host driver
> [ 138.254364] musb-hdrc musb-hdrc: new USB bus registered, assigned bus
> number 2
> [ 138.254821] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
> [ 138.254852] usb usb2: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [ 138.254852] usb usb2: Product: MUSB HDRC host driver
> [ 138.254852] usb usb2: Manufacturer: Linux 3.6.0-rc4-01179-g83ccc22-dirty
> musb-hcd
> [ 138.254882] usb usb2: SerialNumber: musb-hdrc
> [ 138.257629] hub 2-0:1.0: USB hub found
> [ 138.257843] hub 2-0:1.0: 1 port detected
> [ 138.347778] twl4030_usb twl4030_usb: HW_CONDITIONS 0xc0/192; link 3
> [ 138.670959] twl4030_usb twl4030_usb: HW_CONDITIONS 0x40/64; link 4
> [ 138.680175] twl4030_usb twl4030_usb: twl4030_phy_suspend
>
> root@beagleboard:~# rmmod g_mass_storage
> [ 144.341522] g_mass_storage musb-hdrc: unregistering UDC driver [musb-hdrc]
> [ 144.360473] twl4030_usb twl4030_usb: twl4030_phy_resume
> [ 144.366333] gadget: unbind function 'Mass Storage Function'/ddda81c0
> [ 144.373199] gadget: unbind
> [ 144.381652] twl4030_usb twl4030_usb: twl4030_phy_suspend
> [ 144.389312] lun0: close backing file
> [ 144.400421] twl4030_usb twl4030_usb: twl4030_phy_resume
> [ 144.406036] musb-hdrc musb-hdrc: remove, state 4
> [ 144.411590] usb usb2: USB disconnect, device number 1
> [ 144.429382] musb-hdrc musb-hdrc: USB bus 2 deregistered
> [ 144.464599] twl4030_usb twl4030_usb: twl4030_phy_suspend
> root@beagleboard:~# rmmod omap2430
> [ 148.530517] twl4030_usb twl4030_usb: twl4030_phy_resume
> [ 148.540649] twl4030_usb twl4030_usb: twl4030_phy_suspend
> [ 148.552124] udc musb-hdrc: releasing 'musb-hdrc'
> root@beagleboard:~# modprobe omap2430
> [ 154.626739] drivers/usb/musb/omap2430.c:584 (omap2430) omap2430_init
> [ 154.633728] drivers/usb/musb/omap2430.c:445 (omap2430) omap2430_probe
> [ 154.640533] musb-omap2430 musb-omap2430: Unbalanced pm_runtime_enable!
> [ 154.647918] drivers/usb/musb/musb_core.c:2118 (musb_hdrc) musb_probe
> [ 154.654663] drivers/usb/musb/musb_core.c:1888 (musb_hdrc)
> musb_init_controller
> [ 154.662292] drivers/usb/musb/musb_core.c:1813 (musb_hdrc) allocate_instance
> [ 154.698333] twl4030_usb twl4030_usb: twl4030_phy_resume
> [ 154.704010] drivers/usb/musb/musbhsdma.c:391 (musb_hdrc)
> dma_controller_create
> [ 154.711761] drivers/usb/musb/musb_core.c:1388 (musb_hdrc) musb_core_init
> [ 154.718811] musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine,
> bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
> [ 154.729888] musb-hdrc: MHDRC RTL version 1.800
> [ 154.734680] drivers/usb/musb/musb_core.c:1246 (musb_hdrc)
> ep_config_from_table
> [ 154.742279] musb-hdrc: setup fifo_mode 4
> [ 154.746398] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.753082] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.759765] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.766479] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.773162] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.779846] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.786529] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.793212] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.799926] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.806640] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.813323] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.819976] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.826660] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.833343] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.840026] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.846710] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.853393] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.860107] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.866760] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.873443] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.880126] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.886840] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.893524] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.900207] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.906860] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.913513] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.920196] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.926879] drivers/usb/musb/musb_core.c:1173 (musb_hdrc) fifo_setup
> [ 154.933593] musb-hdrc: 28/31 max ep, 16384/16384 memory
> [ 154.939331] drivers/usb/musb/musb_gadget.c:1879 (musb_hdrc)
> musb_gadget_setup
> [ 154.946838] drivers/usb/musb/musb_gadget.c:1842 (musb_hdrc)
> musb_g_init_endpoints
> [ 154.954742] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 154.962341] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 154.969909] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 154.977539] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 154.985137] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 154.992736] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.000305] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.007904] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.015472] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.023071] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.030700] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.038269] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.045898] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.053497] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.061096] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.068695] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.076293] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.083923] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.091522] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.099090] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.106689] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.114318] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.121917] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.129486] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.137084] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.144683] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.152282] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.159881] drivers/usb/musb/musb_gadget.c:1803 (musb_hdrc)
> init_peripheral_ep
> [ 155.169403] musb-hdrc musb-hdrc: USB OTG mode controller at fa0ab000 using
> DMA, IRQ 92
> [ 155.198974] twl4030_usb twl4030_usb: twl4030_phy_suspend
>
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