| Message ID | 011321608e06db0a2797d3a0418b81c75438c571.1601292571.git.saiprakash.ranjan@codeaurora.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Coresight ETF perf NULL pointer dereference and ETM save/restore fixes | expand |
On Mon, Sep 28, 2020 at 05:07:09PM +0530, 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: f188b5e76aae ("coresight: etm4x: Save/restore state across CPU low power states") > Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> > Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> I am applying your patch (this one only) - hopefully it can go in the 5.10 cycle. Thanks, Mathieu > --- > 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); > > writel_relaxed(state->trcclaimset, drvdata->base + TRCCLAIMSET); > > -- > QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member > of Code Aurora Forum, hosted by The Linux Foundation >
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); writel_relaxed(state->trcclaimset, drvdata->base + TRCCLAIMSET);
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: f188b5e76aae ("coresight: etm4x: Save/restore state across CPU low power states") Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> --- drivers/hwtracing/coresight/coresight-etm4x-core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)