* [PATCH] [v4] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe
@ 2021-04-15 7:46 ` Dinghao Liu
0 siblings, 0 replies; 6+ messages in thread
From: Dinghao Liu @ 2021-04-15 7:46 UTC (permalink / raw)
To: dinghao.liu, kjlu
Cc: quanyang.wang, Mark Brown, Michal Simek, Naga Sureshkumar Relli,
Shubhrajyoti Datta, linux-spi, linux-arm-kernel, linux-kernel
There is a PM usage counter decrement after zynqmp_qspi_init_hw()
without any refcount increment, which leads to refcount leak.Add
a refcount increment to balance the refcount. Also set
auto_runtime_pm to resume suspended spi controller.
Fixes: 9e3a000362aec ("spi: zynqmp: Add pm runtime support")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
Changelog:
v2: - Add a refcount increment to fix refcout leak instead of the
refcount decrement on error.
Set ctlr->auto_runtime_pm = true.
v3: - Add fix tag.
Add a return value check against pm_runtime_get_sync().
Move pm_runtime_{mark_last_busy & put_autosuspend} to the
end of current function.
v4: - Add error message on failure of pm_runtime_get_sync().
---
drivers/spi/spi-zynqmp-gqspi.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c
index c8fa6ee18ae7..38f3ddd3ea7c 100644
--- a/drivers/spi/spi-zynqmp-gqspi.c
+++ b/drivers/spi/spi-zynqmp-gqspi.c
@@ -1160,11 +1160,16 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
+
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to pm_runtime_get_sync: %d\n", ret);
+ goto clk_dis_all;
+ }
+
/* QSPI controller initializations */
zynqmp_qspi_init_hw(xqspi);
- pm_runtime_mark_last_busy(&pdev->dev);
- pm_runtime_put_autosuspend(&pdev->dev);
xqspi->irq = platform_get_irq(pdev, 0);
if (xqspi->irq <= 0) {
ret = -ENXIO;
@@ -1187,6 +1192,7 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD |
SPI_TX_DUAL | SPI_TX_QUAD;
ctlr->dev.of_node = np;
+ ctlr->auto_runtime_pm = true;
ret = devm_spi_register_controller(&pdev->dev, ctlr);
if (ret) {
@@ -1194,9 +1200,13 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
goto clk_dis_all;
}
+ pm_runtime_mark_last_busy(&pdev->dev);
+ pm_runtime_put_autosuspend(&pdev->dev);
+
return 0;
clk_dis_all:
+ pm_runtime_put_sync(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(xqspi->refclk);
--
2.17.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH] [v4] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe
@ 2021-04-15 7:46 ` Dinghao Liu
0 siblings, 0 replies; 6+ messages in thread
From: Dinghao Liu @ 2021-04-15 7:46 UTC (permalink / raw)
To: dinghao.liu, kjlu
Cc: quanyang.wang, Mark Brown, Michal Simek, Naga Sureshkumar Relli,
Shubhrajyoti Datta, linux-spi, linux-arm-kernel, linux-kernel
There is a PM usage counter decrement after zynqmp_qspi_init_hw()
without any refcount increment, which leads to refcount leak.Add
a refcount increment to balance the refcount. Also set
auto_runtime_pm to resume suspended spi controller.
Fixes: 9e3a000362aec ("spi: zynqmp: Add pm runtime support")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
Changelog:
v2: - Add a refcount increment to fix refcout leak instead of the
refcount decrement on error.
Set ctlr->auto_runtime_pm = true.
v3: - Add fix tag.
Add a return value check against pm_runtime_get_sync().
Move pm_runtime_{mark_last_busy & put_autosuspend} to the
end of current function.
v4: - Add error message on failure of pm_runtime_get_sync().
---
drivers/spi/spi-zynqmp-gqspi.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c
index c8fa6ee18ae7..38f3ddd3ea7c 100644
--- a/drivers/spi/spi-zynqmp-gqspi.c
+++ b/drivers/spi/spi-zynqmp-gqspi.c
@@ -1160,11 +1160,16 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
+
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to pm_runtime_get_sync: %d\n", ret);
+ goto clk_dis_all;
+ }
+
/* QSPI controller initializations */
zynqmp_qspi_init_hw(xqspi);
- pm_runtime_mark_last_busy(&pdev->dev);
- pm_runtime_put_autosuspend(&pdev->dev);
xqspi->irq = platform_get_irq(pdev, 0);
if (xqspi->irq <= 0) {
ret = -ENXIO;
@@ -1187,6 +1192,7 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD |
SPI_TX_DUAL | SPI_TX_QUAD;
ctlr->dev.of_node = np;
+ ctlr->auto_runtime_pm = true;
ret = devm_spi_register_controller(&pdev->dev, ctlr);
if (ret) {
@@ -1194,9 +1200,13 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
goto clk_dis_all;
}
+ pm_runtime_mark_last_busy(&pdev->dev);
+ pm_runtime_put_autosuspend(&pdev->dev);
+
return 0;
clk_dis_all:
+ pm_runtime_put_sync(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(xqspi->refclk);
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH] [v4] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe
2021-04-15 7:46 ` Dinghao Liu
@ 2021-04-15 8:19 ` quanyang.wang
-1 siblings, 0 replies; 6+ messages in thread
From: quanyang.wang @ 2021-04-15 8:19 UTC (permalink / raw)
To: Dinghao Liu, kjlu
Cc: Mark Brown, Michal Simek, Naga Sureshkumar Relli,
Shubhrajyoti Datta, linux-spi, linux-arm-kernel, linux-kernel
On 4/15/21 3:46 PM, Dinghao Liu wrote:
> There is a PM usage counter decrement after zynqmp_qspi_init_hw()
> without any refcount increment, which leads to refcount leak.Add
> a refcount increment to balance the refcount. Also set
> auto_runtime_pm to resume suspended spi controller.
>
> Fixes: 9e3a000362aec ("spi: zynqmp: Add pm runtime support")
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
>
> Changelog:
>
> v2: - Add a refcount increment to fix refcout leak instead of the
> refcount decrement on error.
> Set ctlr->auto_runtime_pm = true.
>
> v3: - Add fix tag.
> Add a return value check against pm_runtime_get_sync().
> Move pm_runtime_{mark_last_busy & put_autosuspend} to the
> end of current function.
>
> v4: - Add error message on failure of pm_runtime_get_sync().
> ---
> drivers/spi/spi-zynqmp-gqspi.c | 14 ++++++++++++--
> 1 file changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c
> index c8fa6ee18ae7..38f3ddd3ea7c 100644
> --- a/drivers/spi/spi-zynqmp-gqspi.c
> +++ b/drivers/spi/spi-zynqmp-gqspi.c
> @@ -1160,11 +1160,16 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
> pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
> pm_runtime_set_active(&pdev->dev);
> pm_runtime_enable(&pdev->dev);
> +
> + ret = pm_runtime_get_sync(&pdev->dev);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to pm_runtime_get_sync: %d\n", ret);
> + goto clk_dis_all;
> + }
> +
> /* QSPI controller initializations */
> zynqmp_qspi_init_hw(xqspi);
>
> - pm_runtime_mark_last_busy(&pdev->dev);
> - pm_runtime_put_autosuspend(&pdev->dev);
> xqspi->irq = platform_get_irq(pdev, 0);
> if (xqspi->irq <= 0) {
> ret = -ENXIO;
> @@ -1187,6 +1192,7 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
> ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD |
> SPI_TX_DUAL | SPI_TX_QUAD;
> ctlr->dev.of_node = np;
> + ctlr->auto_runtime_pm = true;
>
> ret = devm_spi_register_controller(&pdev->dev, ctlr);
> if (ret) {
> @@ -1194,9 +1200,13 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
> goto clk_dis_all;
> }
>
> + pm_runtime_mark_last_busy(&pdev->dev);
> + pm_runtime_put_autosuspend(&pdev->dev);
> +
> return 0;
>
> clk_dis_all:
> + pm_runtime_put_sync(&pdev->dev);
> pm_runtime_set_suspended(&pdev->dev);
> pm_runtime_disable(&pdev->dev);
> clk_disable_unprepare(xqspi->refclk);
Test this patch at zcu102 board:
root@xilinx-zynqmp:~# dmesg | grep domain2
[ 0.905407] zynqmp_gpd_attach_dev() ff0f0000.spi attached to domain2
domain
[ 0.912390] zynqmp_gpd_power_on() Powered on domain2 domain
[ 4.350331] zynqmp_gpd_power_off() Powered off domain2 domain
root@xilinx-zynqmp:~# flash_erase /dev/mtd3 0 0
Erasing 4 Kibyte @ 0 -- 0 % complete [ 153.125894]
zynqmp_gpd_power_on() Powered on domain2 domain
Erasing 4 Kibyte @ 2e8000 -- 49 % complete [ 156.134884]
zynqmp_gpd_power_off() Powered off domain2 domain
[ 156.142648] zynqmp_gpd_power_on() Powered on domain2 domain
Erasing 4 Kibyte @ 5d5000 -- 99 % complete [ 159.148329]
zynqmp_gpd_power_off() Powered off domain2 domain
[ 159.154579] zynqmp_gpd_power_on() Powered on domain2 domain
Erasing 4 Kibyte @ 5df000 -- 100 % complete
root@xilinx-zynqmp:~# [ 162.910329] zynqmp_gpd_power_off() Powered off
domain2 domain
pm_runtime works now. So
Tested-by: Quanyang Wang <quanyang.wang@windriver.com>
Regards,
Quanyang
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] [v4] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe
@ 2021-04-15 8:19 ` quanyang.wang
0 siblings, 0 replies; 6+ messages in thread
From: quanyang.wang @ 2021-04-15 8:19 UTC (permalink / raw)
To: Dinghao Liu, kjlu
Cc: Mark Brown, Michal Simek, Naga Sureshkumar Relli,
Shubhrajyoti Datta, linux-spi, linux-arm-kernel, linux-kernel
On 4/15/21 3:46 PM, Dinghao Liu wrote:
> There is a PM usage counter decrement after zynqmp_qspi_init_hw()
> without any refcount increment, which leads to refcount leak.Add
> a refcount increment to balance the refcount. Also set
> auto_runtime_pm to resume suspended spi controller.
>
> Fixes: 9e3a000362aec ("spi: zynqmp: Add pm runtime support")
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
>
> Changelog:
>
> v2: - Add a refcount increment to fix refcout leak instead of the
> refcount decrement on error.
> Set ctlr->auto_runtime_pm = true.
>
> v3: - Add fix tag.
> Add a return value check against pm_runtime_get_sync().
> Move pm_runtime_{mark_last_busy & put_autosuspend} to the
> end of current function.
>
> v4: - Add error message on failure of pm_runtime_get_sync().
> ---
> drivers/spi/spi-zynqmp-gqspi.c | 14 ++++++++++++--
> 1 file changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c
> index c8fa6ee18ae7..38f3ddd3ea7c 100644
> --- a/drivers/spi/spi-zynqmp-gqspi.c
> +++ b/drivers/spi/spi-zynqmp-gqspi.c
> @@ -1160,11 +1160,16 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
> pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
> pm_runtime_set_active(&pdev->dev);
> pm_runtime_enable(&pdev->dev);
> +
> + ret = pm_runtime_get_sync(&pdev->dev);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to pm_runtime_get_sync: %d\n", ret);
> + goto clk_dis_all;
> + }
> +
> /* QSPI controller initializations */
> zynqmp_qspi_init_hw(xqspi);
>
> - pm_runtime_mark_last_busy(&pdev->dev);
> - pm_runtime_put_autosuspend(&pdev->dev);
> xqspi->irq = platform_get_irq(pdev, 0);
> if (xqspi->irq <= 0) {
> ret = -ENXIO;
> @@ -1187,6 +1192,7 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
> ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD |
> SPI_TX_DUAL | SPI_TX_QUAD;
> ctlr->dev.of_node = np;
> + ctlr->auto_runtime_pm = true;
>
> ret = devm_spi_register_controller(&pdev->dev, ctlr);
> if (ret) {
> @@ -1194,9 +1200,13 @@ static int zynqmp_qspi_probe(struct platform_device *pdev)
> goto clk_dis_all;
> }
>
> + pm_runtime_mark_last_busy(&pdev->dev);
> + pm_runtime_put_autosuspend(&pdev->dev);
> +
> return 0;
>
> clk_dis_all:
> + pm_runtime_put_sync(&pdev->dev);
> pm_runtime_set_suspended(&pdev->dev);
> pm_runtime_disable(&pdev->dev);
> clk_disable_unprepare(xqspi->refclk);
Test this patch at zcu102 board:
root@xilinx-zynqmp:~# dmesg | grep domain2
[ 0.905407] zynqmp_gpd_attach_dev() ff0f0000.spi attached to domain2
domain
[ 0.912390] zynqmp_gpd_power_on() Powered on domain2 domain
[ 4.350331] zynqmp_gpd_power_off() Powered off domain2 domain
root@xilinx-zynqmp:~# flash_erase /dev/mtd3 0 0
Erasing 4 Kibyte @ 0 -- 0 % complete [ 153.125894]
zynqmp_gpd_power_on() Powered on domain2 domain
Erasing 4 Kibyte @ 2e8000 -- 49 % complete [ 156.134884]
zynqmp_gpd_power_off() Powered off domain2 domain
[ 156.142648] zynqmp_gpd_power_on() Powered on domain2 domain
Erasing 4 Kibyte @ 5d5000 -- 99 % complete [ 159.148329]
zynqmp_gpd_power_off() Powered off domain2 domain
[ 159.154579] zynqmp_gpd_power_on() Powered on domain2 domain
Erasing 4 Kibyte @ 5df000 -- 100 % complete
root@xilinx-zynqmp:~# [ 162.910329] zynqmp_gpd_power_off() Powered off
domain2 domain
pm_runtime works now. So
Tested-by: Quanyang Wang <quanyang.wang@windriver.com>
Regards,
Quanyang
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] [v4] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe
2021-04-15 7:46 ` Dinghao Liu
@ 2021-04-15 18:33 ` Mark Brown
-1 siblings, 0 replies; 6+ messages in thread
From: Mark Brown @ 2021-04-15 18:33 UTC (permalink / raw)
To: kjlu, Dinghao Liu
Cc: Mark Brown, linux-arm-kernel, Naga Sureshkumar Relli,
Michal Simek, linux-spi, linux-kernel, quanyang.wang,
Shubhrajyoti Datta
On Thu, 15 Apr 2021 15:46:44 +0800, Dinghao Liu wrote:
> There is a PM usage counter decrement after zynqmp_qspi_init_hw()
> without any refcount increment, which leads to refcount leak.Add
> a refcount increment to balance the refcount. Also set
> auto_runtime_pm to resume suspended spi controller.
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
Thanks!
[1/1] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe
commit: 58eaa7b2d07d3c25e1068b0bf42ca7e7464f4bca
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] [v4] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe
@ 2021-04-15 18:33 ` Mark Brown
0 siblings, 0 replies; 6+ messages in thread
From: Mark Brown @ 2021-04-15 18:33 UTC (permalink / raw)
To: kjlu, Dinghao Liu
Cc: Mark Brown, linux-arm-kernel, Naga Sureshkumar Relli,
Michal Simek, linux-spi, linux-kernel, quanyang.wang,
Shubhrajyoti Datta
On Thu, 15 Apr 2021 15:46:44 +0800, Dinghao Liu wrote:
> There is a PM usage counter decrement after zynqmp_qspi_init_hw()
> without any refcount increment, which leads to refcount leak.Add
> a refcount increment to balance the refcount. Also set
> auto_runtime_pm to resume suspended spi controller.
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
Thanks!
[1/1] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe
commit: 58eaa7b2d07d3c25e1068b0bf42ca7e7464f4bca
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-04-15 18:36 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-15 7:46 [PATCH] [v4] spi: spi-zynqmp-gqspi: Fix runtime PM imbalance in zynqmp_qspi_probe Dinghao Liu
2021-04-15 7:46 ` Dinghao Liu
2021-04-15 8:19 ` quanyang.wang
2021-04-15 8:19 ` quanyang.wang
2021-04-15 18:33 ` Mark Brown
2021-04-15 18:33 ` Mark Brown
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