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| author | Markos Chandras <markos.chandras@imgtec.com> | 2015-07-09 10:40:51 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-08-26 15:23:18 +0200 |
| commit | 912708c26d673f8d043bc4a9552495fefd6ddf18 (patch) | |
| tree | 22c4b8b96039878787f5917c55028f3dcfa8c9fe /arch/mips/kernel/cpu-probe.c | |
| parent | c982c6d6c48b48159db481581cadbb8773219677 (diff) | |
| download | linux-stable-912708c26d673f8d043bc4a9552495fefd6ddf18.tar.gz linux-stable-912708c26d673f8d043bc4a9552495fefd6ddf18.tar.bz2 linux-stable-912708c26d673f8d043bc4a9552495fefd6ddf18.zip | |
MIPS: Add default case for the FTLB enable/disable code
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>
Diffstat (limited to 'arch/mips/kernel/cpu-probe.c')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index dc057f37305b..6da5f2db6792 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -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) |