Re: [PATCH 2/2] coresight: etm4x: Fix save and restore of TRCVMIDCCTLR1 register
From: Suzuki K Poulose <suzuki.poulose@arm.com>
Date: 2020-09-28 11:01:14
Also in:
linux-arm-msm, lkml
Hi Sai, On 09/27/2020 05:20 PM, Sai Prakash Ranjan wrote:
In commit f188b5e76aae ("coresight: etm4x: Save/restore state
across CPU low power states"), mistakenly TRCVMIDCCTLR1 register
value was saved in trcvmidcctlr0 state variable which is used to
store TRCVMIDCCTLR0 register value in etm4x_cpu_save() and then
same value is written back to both TRCVMIDCCTLR0 and TRCVMIDCCTLR1
in etm4x_cpu_restore(). There is already a trcvmidcctlr1 state
variable available for TRCVMIDCCTLR1, so use it.
Fixes: 8b44fdfef6a2 ("coresight: etm4x: Allow etm4x to be built as a module")Why is this commit in question ?
Fixes: f188b5e76aae ("coresight: etm4x: Save/restore state across CPU low power states")I believe this is the right fixes tag.
quoted hunk ↗ jump to hunk
Signed-off-by: Sai Prakash Ranjan <redacted> --- drivers/hwtracing/coresight/coresight-etm4x-core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index de76d57850bc..abd706b216ac 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c@@ -1243,7 +1243,7 @@ static int etm4_cpu_save(struct etmv4_drvdata *drvdata) state->trccidcctlr1 = readl(drvdata->base + TRCCIDCCTLR1); state->trcvmidcctlr0 = readl(drvdata->base + TRCVMIDCCTLR0); - state->trcvmidcctlr0 = readl(drvdata->base + TRCVMIDCCTLR1); + state->trcvmidcctlr1 = readl(drvdata->base + TRCVMIDCCTLR1); state->trcclaimset = readl(drvdata->base + TRCCLAIMCLR);@@ -1353,7 +1353,7 @@ static void etm4_cpu_restore(struct etmv4_drvdata *drvdata) writel_relaxed(state->trccidcctlr1, drvdata->base + TRCCIDCCTLR1); writel_relaxed(state->trcvmidcctlr0, drvdata->base + TRCVMIDCCTLR0); - writel_relaxed(state->trcvmidcctlr0, drvdata->base + TRCVMIDCCTLR1); + writel_relaxed(state->trcvmidcctlr1, drvdata->base + TRCVMIDCCTLR1);
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel