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| author | Dan Carpenter <dan.carpenter@linaro.org> | 2024-07-15 23:22:55 +0300 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2024-07-16 11:42:56 +0300 |
| commit | 182c6941c55347c735e70ffca77741cd000cbec7 (patch) | |
| tree | b7c68248bb691b7e8c84235ccf4ea36d44ef7b45 /drivers/platform/x86 | |
| parent | 9d20c0535ea822e7306049bfc735bd0fb83400c1 (diff) | |
| download | linux-182c6941c55347c735e70ffca77741cd000cbec7.tar.xz | |
platform/x86/intel/tpmi/plr: Fix output in plr_print_bits()
Smatch complains that 'str' can be used without being initialized:
drivers/platform/x86/intel/intel_plr_tpmi.c:178 plr_print_bits()
error: uninitialized symbol 'str'.
In this loop, we iterate over all the set bits and print the name of the
bit. The intention is that if there is a bit which is between 0-31 we
look for the name in the first array plr_coarse_reasons[] which has 10
elements. If the bit is in the 32-63 range we look for it in the
plr_fine_reasons[] array which has 30 elements. If the bit is in the
invalid ranges, 10-31 or 62-63, then we should print "UNKNOWN(%d)".
The problem is that 'str' needs to be initialized at the start of each
iteration, otherwise if we can't find the string then instead of printing
"UNKNOWN(%d)", we will re-print whatever the previous bit was.
Fixes: 9e9397a41b7b ("platform/x86/intel/tpmi/plr: Add support for the plr mailbox")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/b0084e70-4144-445a-9b89-fb19f6b8336a@stanley.mountain
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Diffstat (limited to 'drivers/platform/x86')
| -rw-r--r-- | drivers/platform/x86/intel/intel_plr_tpmi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/platform/x86/intel/intel_plr_tpmi.c b/drivers/platform/x86/intel/intel_plr_tpmi.c index c1aa52c23d25..69ace6a629bc 100644 --- a/drivers/platform/x86/intel/intel_plr_tpmi.c +++ b/drivers/platform/x86/intel/intel_plr_tpmi.c @@ -162,10 +162,11 @@ static int plr_clear_cpu_status(struct tpmi_plr_die *plr_die, int cpu) static void plr_print_bits(struct seq_file *s, u64 val, int bits) { const unsigned long mask[] = { BITMAP_FROM_U64(val) }; - const char *str; int bit, index; for_each_set_bit(bit, mask, bits) { + const char *str = NULL; + if (bit < PLR_COARSE_REASON_BITS) { if (bit < ARRAY_SIZE(plr_coarse_reasons)) str = plr_coarse_reasons[bit]; |