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From: Shaokun Zhang <zhangshaokun@hisilicon.com>
To: <linux-arm-kernel@lists.infradead.org>
Cc: Shaokun Zhang <zhangshaokun@hisilicon.com>,
	Will Deacon <will@kernel.org>,
	 Mark Rutland <mark.rutland@arm.com>
Subject: [PATCH] drivers/perf: hisi: Fix data source control
Date: Thu, 3 Jun 2021 16:34:51 +0800	[thread overview]
Message-ID: <1622709291-37996-1-git-send-email-zhangshaokun@hisilicon.com> (raw)

'Data source' is a new function for HHA PMU and config / clear
interface was wrong by mistake. 'HHA_DATSRC_CTRL' register is
mainly used for data source configuration, if we enable bit0
as driver, it will go on count the event and we didn't check
it carefully. So fix the issue and do as the initial purpose.

Fixes: 932f6a99f9b0 ("drivers/perf: hisi: Add new functions for HHA PMU")
Reported-by: kernel test robot <lkp@intel.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
---
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
index 12b2c5e6d488..393513150106 100644
--- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -90,7 +90,7 @@ static void hisi_hha_pmu_config_ds(struct perf_event *event)
 
 		val = readl(hha_pmu->base + HHA_DATSRC_CTRL);
 		val |= HHA_DATSRC_SKT_EN;
-		writel(ds_skt, hha_pmu->base + HHA_DATSRC_CTRL);
+		writel(val, hha_pmu->base + HHA_DATSRC_CTRL);
 	}
 }
 
@@ -104,7 +104,7 @@ static void hisi_hha_pmu_clear_ds(struct perf_event *event)
 
 		val = readl(hha_pmu->base + HHA_DATSRC_CTRL);
 		val &= ~HHA_DATSRC_SKT_EN;
-		writel(ds_skt, hha_pmu->base + HHA_DATSRC_CTRL);
+		writel(val, hha_pmu->base + HHA_DATSRC_CTRL);
 	}
 }
 
-- 
2.7.4


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             reply	other threads:[~2021-06-03  8:37 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-03  8:34 Shaokun Zhang [this message]
2021-06-04 19:48 ` [PATCH] drivers/perf: hisi: Fix data source control Will Deacon

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