RTC Inappropriate ioctl for device

RTC Inappropriate ioctl for device

[Aurélien GÉRÔME]

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Hi,

Having CONFIG_RTC=y, I tried on x86 the rtctest program found in
linux-2.6.10/Documentation/rtc.txt. However, it failed at:

ioctl(fd, RTC_UIE_ON, 0);

with:

ioctl: Inappropriate ioctl for device

Did I miss something? Maybe something else conflicts with CONFIG_RTC?

Cheers.

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Re: RTC Inappropriate ioctl for device

[Randy.Dunlap]

Aurélien GÉRÔME wrote:
> Hi,
> 
> Having CONFIG_RTC=y, I tried on x86 the rtctest program found in
> linux-2.6.10/Documentation/rtc.txt. However, it failed at:
> 
> ioctl(fd, RTC_UIE_ON, 0);
> 
> with:
> 
> ioctl: Inappropriate ioctl for device
> 
> Did I miss something? Maybe something else conflicts with CONFIG_RTC?
> 
> Cheers.

Do you have an HPET timer enabled?  That could cause a conflict.

Does /proc/interrupts report rtc interrupts increasing when you
run rtctest?
I.e., does the number of this line increase like this?

   8:        131    IO-APIC-edge  rtc

rtctest works for me (2.6.11-rc4).  Maybe send me the strace
output when you run rtctest and your .config file.
Oh, and your kernel boot log, maybe there are some rtc driver
messages in it.

-- 
~Randy

Re: RTC Inappropriate ioctl for device

[Aurélien GÉRÔME]

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On Mon, Feb 14, 2005 at 07:45:11PM -0800, Randy.Dunlap wrote:
> Aurélien GÉRÔME wrote:
> >Hi,
> >
> >Having CONFIG_RTC=y, I tried on x86 the rtctest program found in
> >linux-2.6.10/Documentation/rtc.txt. However, it failed at:
> >
> >ioctl(fd, RTC_UIE_ON, 0);
> >
> >with:
> >
> >ioctl: Inappropriate ioctl for device
> >
> >Did I miss something? Maybe something else conflicts with CONFIG_RTC?
> >
> >Cheers.
> 
> Do you have an HPET timer enabled?  That could cause a conflict.

I have HPET timer enabled.

> Does /proc/interrupts report rtc interrupts increasing when you
> run rtctest?
> I.e., does the number of this line increase like this?
> 
>   8:        131    IO-APIC-edge  rtc

I have no lines with rtc at the end, maybe due to HPET.

Is it a known behaviour of RTC with HPET?

> rtctest works for me (2.6.11-rc4).  Maybe send me the strace
> output when you run rtctest and your .config file.

See attachment for strace and .config.

> Oh, and your kernel boot log, maybe there are some rtc driver
> messages in it.

See attachment for kern.log.

I have bzip2'ed kern.log and .config, since they were rather large.

Cheers.

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execve("./rtctest", ["./rtctest"], [/* 15 vars */]) = 0
uname({sys="Linux", node="caladan", ...}) = 0
brk(0)                                  = 0x804b000
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fe9000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=41661, ...}) = 0
old_mmap(NULL, 41661, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7fde000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/tls/libc.so.6", O_RDONLY)    = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\360Y\1"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=1253924, ...}) = 0
old_mmap(NULL, 1260140, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xb7eaa000
old_mmap(0xb7fd3000, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x129000) = 0xb7fd3000
old_mmap(0xb7fdb000, 10860, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb7fdb000
close(3)                                = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7ea9000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7ea9460, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
munmap(0xb7fde000, 41661)               = 0
open("/dev/rtc", O_RDONLY)              = 3
write(2, "\n\t\t\tRTC Driver Test Example.\n\n", 30
			RTC Driver Test Example.

) = 30
ioctl(3, RTC_UIE_ON, 0)                 = -1 ENOTTY (Inappropriate ioctl for device)
write(2, "ioctl: Inappropriate ioctl for d"..., 38ioctl: Inappropriate ioctl for device
) = 38
exit_group(25)                          = ?

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[-- Attachment #1.4: .config.bz2 --]
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Re: RTC Inappropriate ioctl for device

[Randy.Dunlap]

Aurélien GÉRÔME wrote:
> On Mon, Feb 14, 2005 at 07:45:11PM -0800, Randy.Dunlap wrote:
> 
>>Aurélien GÉRÔME wrote:
>>
>>>Hi,
>>>
>>>Having CONFIG_RTC=y, I tried on x86 the rtctest program found in
>>>linux-2.6.10/Documentation/rtc.txt. However, it failed at:
>>>
>>>ioctl(fd, RTC_UIE_ON, 0);
>>>
>>>with:
>>>
>>>ioctl: Inappropriate ioctl for device
>>>
>>>Did I miss something? Maybe something else conflicts with CONFIG_RTC?
>>>
>>>Cheers.
>>
>>Do you have an HPET timer enabled?  That could cause a conflict.
> 
> 
> I have HPET timer enabled.

Please add/enable the second line here:
CONFIG_HPET_TIMER=y
# CONFIG_HPET_EMULATE_RTC is not set

and try it again.


>>Does /proc/interrupts report rtc interrupts increasing when you
>>run rtctest?
>>I.e., does the number of this line increase like this?
>>
>>  8:        131    IO-APIC-edge  rtc
> 
> 
> I have no lines with rtc at the end, maybe due to HPET.
> 
> Is it a known behaviour of RTC with HPET?

Apparently that's why a config option was added for it.

>>rtctest works for me (2.6.11-rc4).  Maybe send me the strace
>>output when you run rtctest and your .config file.
> 
> 
> See attachment for strace and .config.
> 
> 
>>Oh, and your kernel boot log, maybe there are some rtc driver
>>messages in it.
> 
> 
> See attachment for kern.log.
> 
> I have bzip2'ed kern.log and .config, since they were rather large.


-- 
~Randy

Re: RTC Inappropriate ioctl for device

[Aurélien GÉRÔME]

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On Tue, Feb 15, 2005 at 08:48:31AM -0800, Randy.Dunlap wrote:
> Please add/enable the second line here:
> CONFIG_HPET_TIMER=y
> # CONFIG_HPET_EMULATE_RTC is not set
> 
> and try it again.

It works now. Well, I had not seen "Provide RTC interrupt" in
menuconfig... :)

Thanks for the tip.

Cheers.

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