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MIPS: Add default case for the FTLB enable/disable code

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Add a default case for the FTLB enable/disable code. This will be used
to detect that something went wrong in the set_ftlb_enable() function
either because that function knows nothing about the running core, or
simply because the core can't turn its FTLB on/off.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10650/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Markos Chandras 2015-07-09 10:40:51 +01:00 committed by Ralf Baechle
parent c982c6d6c4
commit 912708c26d
1 changed files with 10 additions and 3 deletions
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13
arch/mips/kernel/cpu-probe.c
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@ -188,7 +188,7 @@ __setup("nohtw", htw_disable);
static int mips_ftlb_disabled;
static int mips_has_ftlb_configured;
static void set_ftlb_enable(struct cpuinfo_mips *c, int enable);
static int set_ftlb_enable(struct cpuinfo_mips *c, int enable);
static int __init ftlb_disable(char *s)
{
@ -202,7 +202,10 @@ static int __init ftlb_disable(char *s)
return 1;
/* Disable it in the boot cpu */
set_ftlb_enable(&cpu_data[0], 0);
if (set_ftlb_enable(&cpu_data[0], 0)) {
pr_warn("Can't turn FTLB off\n");
return 1;
}
back_to_back_c0_hazard();
@ -364,7 +367,7 @@ static unsigned int calculate_ftlb_probability(struct cpuinfo_mips *c)
return 3;
}
static void set_ftlb_enable(struct cpuinfo_mips *c, int enable)
static int set_ftlb_enable(struct cpuinfo_mips *c, int enable)
{
unsigned int config6;
@ -386,7 +389,11 @@ static void set_ftlb_enable(struct cpuinfo_mips *c, int enable)
/* Disable FTLB */
write_c0_config6(config6 & ~MIPS_CONF6_FTLBEN);
break;
default:
return 1;
}
return 0;
}
static inline unsigned int decode_config0(struct cpuinfo_mips *c)