linux-kernel - [PATCH] powerpc/book3s/32: fix number of bats in p/v_block

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Message-Id: <6d1eb005328a8a4608fbed8628e04f493b1c6ce2.1542389250.git.christophe.leroy@c-s.fr>
Date:   Fri, 16 Nov 2018 17:27:42 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] powerpc/book3s/32: fix number of bats in p/v_block_mapped()

This patch fixes the loop in p_block_mapped() and v_block_mapped()
to scan the entire bat_addrs[] array.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/mm/ppc_mmu_32.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c
index cacc43ee5f15..8e1fdea640cd 100644
--- a/arch/powerpc/mm/ppc_mmu_32.c
+++ b/arch/powerpc/mm/ppc_mmu_32.c
@@ -52,7 +52,7 @@ struct batrange {		/* stores address ranges mapped by BATs */
 phys_addr_t v_block_mapped(unsigned long va)
 {
 	int b;
-	for (b = 0; b < 4; ++b)
+	for (b = 0; b < ARRAY_SIZE(bat_addrs); ++b)
 		if (va >= bat_addrs[b].start && va < bat_addrs[b].limit)
 			return bat_addrs[b].phys + (va - bat_addrs[b].start);
 	return 0;
@@ -64,7 +64,7 @@ phys_addr_t v_block_mapped(unsigned long va)
 unsigned long p_block_mapped(phys_addr_t pa)
 {
 	int b;
-	for (b = 0; b < 4; ++b)
+	for (b = 0; b < ARRAY_SIZE(bat_addrs); ++b)
 		if (pa >= bat_addrs[b].phys
 	    	    && pa < (bat_addrs[b].limit-bat_addrs[b].start)
 		              +bat_addrs[b].phys)
-- 
2.13.3