linux-kernel - [PATCH v2 5/5] riscv: check for kernel config option in t-head memory types errata

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Date:   Mon,  5 Sep 2022 13:10:27 +0200
From:   Heiko Stuebner <heiko@...ech.de>
To:     paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu
Cc:     guoren@...nel.org, apatel@...tanamicro.com, atishp@...osinc.com,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Heiko Stuebner <heiko@...ech.de>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Andrew Jones <ajones@...tanamicro.com>
Subject: [PATCH v2 5/5] riscv: check for kernel config option in t-head memory types errata

The t-head variant of page-based memory types should also check first
for the enabled kernel config option.

Fixes: a35707c3d850 ("riscv: add memory-type errata for T-Head")
Signed-off-by: Heiko Stuebner <heiko@...ech.de>
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
Reviewed-by: Andrew Jones <ajones@...tanamicro.com>
---
 arch/riscv/errata/thead/errata.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/riscv/errata/thead/errata.c b/arch/riscv/errata/thead/errata.c
index a6f4bd8ccf3f..902e12452821 100644
--- a/arch/riscv/errata/thead/errata.c
+++ b/arch/riscv/errata/thead/errata.c
@@ -17,6 +17,9 @@
 static bool errata_probe_pbmt(unsigned int stage,
 			      unsigned long arch_id, unsigned long impid)
 {
+	if (!IS_ENABLED(CONFIG_ERRATA_THEAD_PBMT))
+		return false;
+
 	if (arch_id != 0 || impid != 0)
 		return false;
 
-- 
2.35.1