CVS commit: src/sys/dev/pci

[Joerg Sonnenberger <joerg%netbsd.org@localhost>]

Module Name:    src
Committed By:   joerg
Date:           Wed Oct 19 20:18:00 UTC 2005

Modified Files:
        src/sys/dev/pci: if_iwi.c

Log Message:
Fix a kernel segfault when a RX interrupt can't allocate a new mbuf.
The change adopts the idea of fxp to drop the incoming packet and panic
if the old mbuf cannot be reloaded. Since the bus_dmamap is allocated
during attach, this is not supposed to happen. Since a lot of code moves
anyway, factor out the allocation of RX ring elements, which is shared
between the init path and the RX interrupt path.

XXX A better fix might be to borrow the mbuf from the logic end of the
XXX ring buffer, but that needs more involved driver changes.

Reviewed by dyoung@ and nick@


To generate a diff of this commit:
cvs rdiff -r1.30 -r1.31 src/sys/dev/pci/if_iwi.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.