66f314b5f2
parameter in the read and write case dereferenced an unitialized pointer and can't possibly ever have catched an actual invalid argument. This was apparently true for the read/write and getconf cases. The latter does not even receive the paramter that is to be verified. I'm surprised that this did not cause kernel panics, but it seems that the uninitialized local variable happens to contain data that may be used as a pointer to memory that satisfies the test condition. Make the code work as intended by moving the test inside the switch case where the pointer has been properly initialized. Since the read and write case shared just about all code (except for the single call to PCIB_READ_CONFIG resp. PCIB_WRITE_CONFIG) I have merged both cases. Noticed by: trhodes@FreeBSD.org (Tom Rhodes)
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