Re: [RFC][PATCH] cpufreq: e_powersaver: Fix checking brand for EPS_BRAND_C3

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




Do not return -ENODEV for EPS_BRAND_C3.

Signed-off-by: Axel Lin<axel.lin@xxxxxxxxx>
---
I just found the code is suspect.
I don't have this hardware handy.
Anyone can help to confirm and test if this patch works?
Axel

  drivers/cpufreq/e_powersaver.c |    3 ++-
  1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/cpufreq/e_powersaver.c b/drivers/cpufreq/e_powersaver.c
index 35a257d..637f055 100644
--- a/drivers/cpufreq/e_powersaver.c
+++ b/drivers/cpufreq/e_powersaver.c
@@ -199,8 +199,9 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
  		break;
  	case EPS_BRAND_C3:
  		printk(KERN_CONT "C3\n");
-		return -ENODEV;
  		break;
+	default:
+		return -ENODEV;
  	}
  	/* Enable Enhanced PowerSaver */
  	rdmsrl(MSR_IA32_MISC_ENABLE, val);
EPS_BRAND_C3 isn't handled by this driver. So you have to return -ENODEV for it. Why this code is suspect?
If you looking for an error it is probably in:
> rdmsr(0x1154, lo, hi);
> brand = (((lo >> 4) ^ (lo >> 2))) & 0x000000ff;
which was added later to this driver. Probably & 0xff should be replaced by & 3.

Best regards
Rafał Bilski


----------------------------------------------------------------
Najwieksza baza samochodow nowych i uzywanych
Sprawdz >> http://linkint.pl/f29e3
--
To unsubscribe from this list: send the line "unsubscribe cpufreq" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Kernel Devel]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Forum]     [Linux SCSI]

  Powered by Linux