* [PATCH] mtd: spi-nor: Fix runtime PM imbalance in cqspi_probe
@ 2020-05-22 10:05 Dinghao Liu
2020-07-01 7:58 ` Tudor.Ambarus
0 siblings, 1 reply; 2+ messages in thread
From: Dinghao Liu @ 2020-05-22 10:05 UTC (permalink / raw)
To: dinghao.liu, kjlu
Cc: Tudor Ambarus, Miquel Raynal, Richard Weinberger,
Vignesh Raghavendra, Philipp Zabel, Boris Brezillon,
Michael Walle, Thomas Gleixner, Thor Thayer, Stephen Boyd,
linux-mtd, linux-kernel
When devm_reset_control_get_optional_exclusive() returns
an error code, a pairing runtime PM usage counter
decrement is needed to keep the counter balanced.
Also, call pm_runtime_disable() when pm_runtime_get_sync()
and devm_reset_control_get_optional_exclusive() return an
error code.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
drivers/mtd/spi-nor/controllers/cadence-quadspi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
index 494dcab4aaaa..eabdf01e0d08 100644
--- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
@@ -1377,6 +1377,7 @@ static int cqspi_probe(struct platform_device *pdev)
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
pm_runtime_put_noidle(dev);
+ pm_runtime_disable(dev);
return ret;
}
@@ -1390,12 +1391,16 @@ static int cqspi_probe(struct platform_device *pdev)
rstc = devm_reset_control_get_optional_exclusive(dev, "qspi");
if (IS_ERR(rstc)) {
dev_err(dev, "Cannot get QSPI reset.\n");
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
return PTR_ERR(rstc);
}
rstc_ocp = devm_reset_control_get_optional_exclusive(dev, "qspi-ocp");
if (IS_ERR(rstc_ocp)) {
dev_err(dev, "Cannot get QSPI OCP reset.\n");
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
return PTR_ERR(rstc_ocp);
}
--
2.17.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] mtd: spi-nor: Fix runtime PM imbalance in cqspi_probe
2020-05-22 10:05 [PATCH] mtd: spi-nor: Fix runtime PM imbalance in cqspi_probe Dinghao Liu
@ 2020-07-01 7:58 ` Tudor.Ambarus
0 siblings, 0 replies; 2+ messages in thread
From: Tudor.Ambarus @ 2020-07-01 7:58 UTC (permalink / raw)
To: dinghao.liu, kjlu
Cc: thor.thayer, vigneshr, bbrezillon, richard, linux-kernel, swboyd,
michael, linux-mtd, p.zabel, miquel.raynal, tglx
On 5/22/20 1:05 PM, Dinghao Liu wrote:
> When devm_reset_control_get_optional_exclusive() returns
> an error code, a pairing runtime PM usage counter
> decrement is needed to keep the counter balanced.
>
> Also, call pm_runtime_disable() when pm_runtime_get_sync()
> and devm_reset_control_get_optional_exclusive() return an
> error code.
>
I see that this is now fixed with the move to drivers/spi/spi-cadence-quadspi.c
Thanks,
ta
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
> drivers/mtd/spi-nor/controllers/cadence-quadspi.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
> index 494dcab4aaaa..eabdf01e0d08 100644
> --- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
> +++ b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
> @@ -1377,6 +1377,7 @@ static int cqspi_probe(struct platform_device *pdev)
> ret = pm_runtime_get_sync(dev);
> if (ret < 0) {
> pm_runtime_put_noidle(dev);
> + pm_runtime_disable(dev);
> return ret;
> }
>
> @@ -1390,12 +1391,16 @@ static int cqspi_probe(struct platform_device *pdev)
> rstc = devm_reset_control_get_optional_exclusive(dev, "qspi");
> if (IS_ERR(rstc)) {
> dev_err(dev, "Cannot get QSPI reset.\n");
> + pm_runtime_put_sync(dev);
> + pm_runtime_disable(dev);
> return PTR_ERR(rstc);
> }
>
> rstc_ocp = devm_reset_control_get_optional_exclusive(dev, "qspi-ocp");
> if (IS_ERR(rstc_ocp)) {
> dev_err(dev, "Cannot get QSPI OCP reset.\n");
> + pm_runtime_put_sync(dev);
> + pm_runtime_disable(dev);
> return PTR_ERR(rstc_ocp);
> }
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-07-01 7:58 ` Tudor.Ambarus
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