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| author | Christian Marangi <ansuelsmth@gmail.com> | 2024-06-11 13:35:33 +0200 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2024-06-11 16:05:24 +0200 |
| commit | ce5cdd3b05216b704a704f466fb4c2dff3778caf (patch) | |
| tree | 525c451aa77f9522519f836df3ce9fefffc825d5 /arch | |
| parent | 277a0363120276645ae598d8d5fea7265e076ae9 (diff) | |
| download | linux-stable-ce5cdd3b05216b704a704f466fb4c2dff3778caf.tar.gz linux-stable-ce5cdd3b05216b704a704f466fb4c2dff3778caf.tar.bz2 linux-stable-ce5cdd3b05216b704a704f466fb4c2dff3778caf.zip | |
mips: bmips: BCM6358: make sure CBR is correctly set
It was discovered that some device have CBR address set to 0 causing
kernel panic when arch_sync_dma_for_cpu_all is called.
This was notice in situation where the system is booted from TP1 and
BMIPS_GET_CBR() returns 0 instead of a valid address and
!!(read_c0_brcm_cmt_local() & (1 << 31)); not failing.
The current check whether RAC flush should be disabled or not are not
enough hence lets check if CBR is a valid address or not.
Fixes: ab327f8acdf8 ("mips: bmips: BCM6358: disable RAC flush for TP1")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Acked-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/bmips/setup.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/bmips/setup.c b/arch/mips/bmips/setup.c index ec180ab92eaa..66a8ba19c287 100644 --- a/arch/mips/bmips/setup.c +++ b/arch/mips/bmips/setup.c @@ -110,7 +110,8 @@ static void bcm6358_quirks(void) * RAC flush causes kernel panics on BCM6358 when booting from TP1 * because the bootloader is not initializing it properly. */ - bmips_rac_flush_disable = !!(read_c0_brcm_cmt_local() & (1 << 31)); + bmips_rac_flush_disable = !!(read_c0_brcm_cmt_local() & (1 << 31)) || + !!BMIPS_GET_CBR(); } static void bcm6368_quirks(void) |