svn commit: r195534 - in head: etc/mtree include lib/libcam sbin/camcontrol share/man/man4 sys/cam sys/cam/ata sys/cam/scsi sys/conf sys/dev/advansys sys/dev/ahci sys/dev/aic7xxx sys/dev/amd sys/de...

[Paul B. Mahol]

On 7/11/09, Paul B. Mahol <onemda at gmail.com> wrote:
> On 7/11/09, Paul B. Mahol <onemda at gmail.com> wrote:
>> This one breaks cam.ko for me.
>> I can't load cam any more. I can't load ahci.ko
>> If I try to use umass it will panic system(obviously because cam is
>> never loaded in kernel)
>
> It is loaded (somehow in bad shape) but not reported via kldstat.
>
>> Well that is another bug because umass should not be loaded at first
>> place.
>
> db:0:kdb.enter.unknown>  bt
> Tracing pid 33066 tid 100081 td 0xc41d3d80
> malloc_type_zone_allocated(c108ca80,0,1,0,c41bea0c,...) at
> malloc_type_zone_allocated+0x31
> malloc(3c,c43c20c4,1,c41bea0c,c3be9b18,...) at malloc+0xfd
> cam_devq_alloc(0,1,c3be9b64,c444ec2d,1,...) at cam_devq_alloc+0x23
> cam_simq_alloc(1,3e8,c41bea8c,c44529c0,9,...) at cam_simq_alloc+0x19
> umass_attach(c45dda00,c450905c,c064d8a8,c0621520,80000000,...) at
> umass_attach+0x323
> device_attach(c45dda00,4,c0621469,9f1) at device_attach+0x36a
> device_probe_and_attach(c45dda00,c3be9c18,ffffffff,c3e28800,0,...) at
> device_probe_and_attach+0x53
> usb_probe_and_attach_sub(c3e28800,0,c447461b,4d8,7373614d,...) at
> usb_probe_and_attach_sub+0x71
> usb_probe_and_attach(c3e28800,ff,c3f79800,1,5,...) at
> usb_probe_and_attach+0x146
> uhub_explore(c3f79800,0,c4473a37,e0,c451cd34,...) at uhub_explore+0x4c9
> usb_bus_explore(c451cd34,c451cdac,c4475dee,67,c0692640,...) at
> usb_bus_explore+0xb3
> usb_process(c451ccd4,c3be9d38,c061a053,342,c4373aa0,...) at
> usb_process+0xda
> fork_exit(c446cff9,c451ccd4,c3be9d38) at fork_exit+0xb8
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0, eip = 0, esp = 0xc3be9d70, ebp = 0 ---
>
>> When trying to load cam.ko nothing verbose is displayed, just this:
>>
>> module_register: module probe already exists!
>> Module probe failed to register: 17
>
> Argh, it's so obvious, it doesnt get loaded because module probe is
> used twice with
> PERIPHDRIVER_DECLARE(probe, ...) in scsi_xpt.c and ata_xpt.c
>
> If I load cam from loader it works fine.
> I was attempting to fix this "probe" issue already but I give up
> because I did not get any results(maybe because cam.ko was really already
> "loaded"?)
>
> Now one nasty question: Is there any plan to make cam.ko unloadable?

Patch attached.

-- 
Paul
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