linux/drivers/net/ethernet/ibm
Lijun Pan 1f45dc2206 ibmvnic: continue fatal error reset after passive init
Commit f9c6cea0b3 ("ibmvnic: Skip fatal error reset after passive init")
says "If the passive
CRQ initialization occurs before the FATAL reset task is processed,
the FATAL error reset task would try to access a CRQ message queue
that was freed, causing an oops. The problem may be most likely to
occur during DLPAR add vNIC with a non-default MTU, because the DLPAR
process will automatically issue a change MTU request.
Fix this by not processing fatal error reset if CRQ is passively
initialized after client-driven CRQ initialization fails."

The original commit skips a specific reset condition, but that does
not fix the problem it claims to fix, and misses a reset condition.
The effective fix is commit 0e435befae ("ibmvnic: fix NULL pointer
dereference in ibmvic_reset_crq") and commit a0faaa27c7 ("ibmvnic:
fix NULL pointer dereference in reset_sub_crq_queues"). With above
two fixes, there are no more crashes seen as described even without
the original commit, so I would like to revert the original commit.

Fixes: f9c6cea0b3 ("ibmvnic: Skip fatal error reset after passive init")
Signed-off-by: Lijun Pan <ljp@linux.ibm.com>
Link: https://lore.kernel.org/r/20201223204904.12677-1-ljp@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-23 12:56:10 -08:00
..
ehea net: ehea: convert tasklets to use new tasklet_setup() API 2020-09-14 13:02:37 -07:00
emac treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ibmveth.c ibmveth: Fix use of ibmveth in a bridge. 2020-10-27 17:52:51 -07:00
ibmveth.h net/ethtool: Introduce link_ksettings API for virtual network devices 2020-02-29 21:48:55 -08:00
ibmvnic.c ibmvnic: continue fatal error reset after passive init 2020-12-23 12:56:10 -08:00
ibmvnic.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-12-03 15:44:09 -08:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00