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36 lines
1.4 KiB
Diff
36 lines
1.4 KiB
Diff
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From ce5cdd3b05216b704a704f466fb4c2dff3778caf Mon Sep 17 00:00:00 2001
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From: Christian Marangi <ansuelsmth@gmail.com>
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Date: Tue, 11 Jun 2024 13:35:33 +0200
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Subject: [PATCH] mips: bmips: BCM6358: make sure CBR is correctly set
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It was discovered that some device have CBR address set to 0 causing
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kernel panic when arch_sync_dma_for_cpu_all is called.
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This was notice in situation where the system is booted from TP1 and
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BMIPS_GET_CBR() returns 0 instead of a valid address and
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!!(read_c0_brcm_cmt_local() & (1 << 31)); not failing.
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The current check whether RAC flush should be disabled or not are not
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enough hence lets check if CBR is a valid address or not.
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Fixes: ab327f8acdf8 ("mips: bmips: BCM6358: disable RAC flush for TP1")
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Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
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Acked-by: Florian Fainelli <florian.fainelli@broadcom.com>
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Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
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---
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arch/mips/bmips/setup.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/arch/mips/bmips/setup.c
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+++ b/arch/mips/bmips/setup.c
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@@ -110,7 +110,8 @@ static void bcm6358_quirks(void)
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* RAC flush causes kernel panics on BCM6358 when booting from TP1
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* because the bootloader is not initializing it properly.
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*/
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- bmips_rac_flush_disable = !!(read_c0_brcm_cmt_local() & (1 << 31));
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+ bmips_rac_flush_disable = !!(read_c0_brcm_cmt_local() & (1 << 31)) ||
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+ !!BMIPS_GET_CBR();
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}
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static void bcm6368_quirks(void)
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