diff options
| author | Armin Wolf <W_Armin@gmx.de> | 2021-08-14 22:05:16 +0300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2021-08-18 00:54:27 +0300 |
| commit | 8713b4a49c8a9acc1fe25e6b98a9bbd0e9b3a680 (patch) | |
| tree | cd25ad1f56d223b237d51015e51329cc9fa7a3ae /drivers/hwmon | |
| parent | 782a99c146ffe9d0e06f139daea0e56d866eabc8 (diff) | |
| download | linux-8713b4a49c8a9acc1fe25e6b98a9bbd0e9b3a680.tar.xz | |
hwmon: (dell-smm) Rework SMM function debugging
Drop #ifdef DEBUG and use ktime_us_delta()
for improved precision.
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Reviewed-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20210814190516.26718-1-W_Armin@gmx.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/dell-smm-hwmon.c | 21 |
1 files changed, 6 insertions, 15 deletions
diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c index f93baf1035cc..774c1b0715d9 100644 --- a/drivers/hwmon/dell-smm-hwmon.c +++ b/drivers/hwmon/dell-smm-hwmon.c @@ -158,17 +158,12 @@ static inline const char __init *i8k_get_dmi_data(int field) */ static int i8k_smm_func(void *par) { - int rc; + ktime_t calltime = ktime_get(); struct smm_regs *regs = par; int eax = regs->eax; - -#ifdef DEBUG int ebx = regs->ebx; - unsigned long duration; - ktime_t calltime, delta, rettime; - - calltime = ktime_get(); -#endif + long long duration; + int rc; /* SMM requires CPU 0 */ if (smp_processor_id() != 0) @@ -230,13 +225,9 @@ static int i8k_smm_func(void *par) if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) rc = -EINVAL; -#ifdef DEBUG - rettime = ktime_get(); - delta = ktime_sub(rettime, calltime); - duration = ktime_to_ns(delta) >> 10; - pr_debug("smm(0x%.4x 0x%.4x) = 0x%.4x (took %7lu usecs)\n", eax, ebx, - (rc ? 0xffff : regs->eax & 0xffff), duration); -#endif + duration = ktime_us_delta(ktime_get(), calltime); + pr_debug("smm(0x%.4x 0x%.4x) = 0x%.4x (took %7lld usecs)\n", eax, ebx, + (rc ? 0xffff : regs->eax & 0xffff), duration); return rc; } |