K 10
svn:author
V 6
luporl
K 8
svn:date
V 27
2019-02-05T18:16:14.343851Z
K 7
svn:log
V 543
[ppc64] llan: fix fatal kernel trap when system is low on memory

When running several builders in parallel, on QEMU, with 8GB of
memory, a fatal kernel trap (0x300 (data storage interrupt))
caused by llan driver is sometimes observed, when the system
starts to run out of swap space.

This happens because, at llan_intr(), a phyp call to add a
logical LAN buffer is always made when llan_add_rxbuf() fails,
even if it fails to allocate a new buffer.

PR:	235489
Reviewed by:	jhibbits
Differential Revision:	https://reviews.freebsd.org/D19084

END