]> asedeno.scripts.mit.edu Git - linux.git/commit
powerpc/64s: Fix DT CPU features Power9 DD2.1 logic
authorMichael Ellerman <mpe@ellerman.id.au>
Wed, 13 Jun 2018 13:23:56 +0000 (23:23 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 19 Jun 2018 11:28:21 +0000 (21:28 +1000)
commit749a0278c2177b2d16da5d8b135ba7f940bb4199
treeec267d992c4bcd8d2ad3843c96c915d3181c509c
parent02390f66bd2362df114a0a0770d80ec33061f6d1
powerpc/64s: Fix DT CPU features Power9 DD2.1 logic

In the device tree CPU features quirk code we want to set
CPU_FTR_POWER9_DD2_1 on all Power9s that aren't DD2.0 or earlier. But
we got the logic wrong and instead set it on all CPUs that aren't
Power9 DD2.0 or earlier, ie. including Power8.

Fix it by making sure we're on a Power9. This isn't a bug in practice
because the only code that checks the feature is Power9 only to begin
with. But we'll backport it anyway to avoid confusion.

Fixes: 9e9626ed3a4a ("powerpc/64s: Fix POWER9 DD2.2 and above in DT CPU features")
Cc: stable@vger.kernel.org # v4.17+
Reported-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kernel/dt_cpu_ftrs.c