From: Bo Yan <byan@nvidia.com>
Date: Tue, 31 Mar 2015 20:30:48 +0000 (+0100)
Subject: arm64: fix midr range for Cortex-A57 erratum 832075
X-Git-Tag: omap-for-v4.2/o2_dc~115^2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d1966dfd6e0ad2f8aa4b664ae1a62e33abe1998;p=pandora-kernel.git

arm64: fix midr range for Cortex-A57 erratum 832075

Register MIDR_EL1 is masked to get variant and revision fields, then
compared against midr_range_min and midr_range_max when checking
whether CPU is affected by any particular erratum. However, variant
and revision fields in MIDR_EL1 are separated by 16 bits, so the min
and max of midr range should be constructed accordingly, otherwise
the patch will not be applied when variant field is non-0.

Cc: stable@vger.kernel.org # 3.19+
Acked-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Bo Yan <byan@nvidia.com>
[will: use MIDR_VARIANT_SHIFT to construct upper bound]
Signed-off-by: Will Deacon <will.deacon@arm.com>
---

Reading git-diff-tree failed