dc7c539e33
struct ifnet most of if_findindex() become a complex no-op. Remove it and replace it with a corrected version of the four line for loop it devolved to plus some error handling. This should probably be replaced with subr_unit at some point. Switch from checking ifaddr_byindex to ifnet_byindex when looking for empty indexes. Since we're doing this from if_alloc/if_free, we can only be sure that ifnet_byindex will be correct. This fixes panics when loading the ef(4) module. The panics were caused by the fact that if_alloc was called four time before if_attach was called and thus ifaddr_byindex was not set and the same unit was allocated again. This in turn caused the first if_attach to fail because the ifp was not the one in ifnet_byindex(ifp->if_index). Reported by: "Wojciech A. Koszek" <dunstan at freebsd dot czest dot pl> PR: kern/84987 MFC After: 1 day
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