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Naphtali Sprei
0859df68df
Here's a patch to fix the issue introduced by me, as Reimar Döffinger pointed out, Reimar Döffinger wrote: > On Thu, Aug 13, 2009 at 03:01:20PM +0300, Naphtali Sprei wrote: >> Bug fix for segfault when run as i82551 HW: >> Use Extended TBD only when HW supports it (i82558 and up). >> >> Added assertions to guard from such buffer overflow >> Introduce the MAX_TCB_BYTE_COUNT macro >> Allocate buf big enough as HW needs (MAX_ETH_FRAME_SIZE -> MAX_TCB_BYTE_COUNT) >> >> >> I don't feel 100% OK with the "s->device >= i82558B" condition >> since it relies on the numeric (hex) value of those defines, which currently >> is correct, but changes (which I don't forsee now) might break it. > > It seems this was applied. Unfortunately this breaks things on FreeBSD. > There seem to be multiple issues. > First, the intel document says the 82551, 82550, 82559 models are all > supersets of the 82558. Or in other words: they all support this > feature. > Only the 82557 does not. > But then even for that the FreeBSD driver will fail. > The reason for that is this line: > eeprom_contents[0xa] = 0x4000; > the value here must be 0x01000 for all 82557 models it seems. Correct the logic of determining devices that supports extended TxCB: only the 82557 do not support it. Signed-off-by: Naphtali Sprei <nsprei@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Read the documentation in qemu-doc.html. Fabrice Bellard.