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From"hua xu" <>
SubjectProblem: do_ioctl() doesn't work well on setting txpower
DateWed, 25 Dec 2002 17:11:36 +0000
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I have a problem on setting txpower in the kernel module, and I wish to be personally CC'ed the answers/comments posted to the list in response.
It is the first time for me to make a kernel module in order to manage txpower.I am using Vine Linux 2.4.18-0v13 and wireless LAN card is CISCO AIRONET 350 whose txpower can be change in 3 levels. Following is my problem in the kernel programming.
With CISCO LAN card, I can change the txpower by the command: iwconfig, however, in my kernel programming, I am using do_ioctl() intending to set txpower. There are two aspects on my problem. One aspect is that when I set wrq.u.txpower.value which I am intended to change, and do the do_ioctl(). After complying the kernel module, the wireless LAN card just turned off its txpower but the value is not changed. Then when I set wrq.u.txpower.diabled trying to keep txpower on, I got the error message (I am using 兎rrno
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