Michael Ellerman 3051f39253 ehea: Fix memory hook reference counting crashes ... The recent commit to only register the EHEA memory hotplug hooks on adapter probe has a few problems. Firstly the reference counting is wrong for multiple adapters, in that the hooks are registered multiple times. Secondly the check in the tear down path is backward. Finally the error path doesn't decrement the count. The multiple registration of the hooks is the biggest problem, as it leads to oopses when the system is rebooted, and/or errors during memory hotplug, eg: $ ./mem-on-off-test.sh -r 2 ... ehea: memory is going offline ehea: LPAR memory changed - re-initializing driver ehea: re-initializing driver complete ehea: memory is going offline ehea: LPAR memory changed - re-initializing driver ehea: opcode=26c ret=fffffffffffffffc arg1=8000000003000003 arg2=0 arg3=700000060000d600 arg4=3fded0000 arg5=200 arg6=0 arg7=0 ehea: register_rpage_mr failed ehea: registering mr failed ehea: register MR failed - driver inoperable! ehea: memory is going offline Fixes: aa18332331 ("ehea: Register memory hotplug, reboot and crash hooks on adapter probe") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-04-25 14:33:04 -04:00
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ehea.h	ehea: Remove uses of virt_to_abs() and abs_to_virt()	2012-09-05 15:18:46 +10:00
ehea_ethtool.c	net: use SPEED_UNKNOWN and DUPLEX_UNKNOWN when appropriate	2014-06-06 16:24:07 -07:00
ehea_hw.h
ehea_main.c	ehea: Fix memory hook reference counting crashes	2015-04-25 14:33:04 -04:00
ehea_phyp.c	ehea: Remove uses of virt_to_abs() and abs_to_virt()	2012-09-05 15:18:46 +10:00
ehea_phyp.h	powerpc: Move get_longbusy_msecs into hvcall.h and remove duplicate function	2012-11-15 15:08:07 +11:00
ehea_qmr.c	net: ethernet: ibm: ehea: ehea_qmr.c: Fix for possible null pointer dereference	2014-05-18 21:26:02 -04:00
ehea_qmr.h
Makefile	net: ethernet: ibm: ehea: Remove duplicate object from Makefile	2014-08-14 14:38:54 -07:00