Commit edbdabc6 authored by Adam Lessnau's avatar Adam Lessnau Committed by Rafael J. Wysocki

powercap/RAPL: prevent overridding bits outside of the mask

Fixes wrong bits shift operation in the rapl_write_data_raw function, which
might cause overridding bits outside of the mask.

For example, writing new TIME_WINDOW1 value can override POWER_LIMIT1.
Signed-off-by: default avatarAdam Lessnau <>
Signed-off-by: default avatarRafael J. Wysocki <>
parent c0bc126f
......@@ -874,7 +874,9 @@ static int rapl_write_data_raw(struct rapl_domain *rd,
cpu = rd->rp->lead_cpu;
bits = rapl_unit_xlate(rd, rp->unit, value, 1);
bits |= bits << rp->shift;
bits <<= rp->shift;
bits &= rp->mask;
memset(&ma, 0, sizeof(ma));
ma.msr_no = rd->msrs[rp->id];
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