From: Clark Wang <xiaoning.wang@nxp.com> To: broonie@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, nikita.shubin@maquefel.me Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] spi: imx: fix the unbalanced spi runtime pm management Date: Tue, 24 Nov 2020 16:52:47 +0800 [thread overview] Message-ID: <20201124085247.18025-1-xiaoning.wang@nxp.com> (raw) If set active without increase the usage count of pm, the dont use autosuspend function will call the suspend callback to close the two clocks of spi because the usage count is reduced to -1. This will cause the warning dump below when the defer-probe occurs. [ 129.379701] ecspi2_root_clk already disabled [ 129.384005] WARNING: CPU: 1 PID: 33 at drivers/clk/clk.c:952 clk_core_disable+0xa4/0xb0 So add the get noresume function before set active. Fixes: 43b6bf406cd0 spi: imx: fix runtime pm support for !CONFIG_PM Signed-off-by: Clark Wang <xiaoning.wang@nxp.com> --- drivers/spi/spi-imx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 7513ef552d79..73ca821763d6 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -1659,6 +1659,7 @@ static int spi_imx_probe(struct platform_device *pdev) pm_runtime_set_autosuspend_delay(spi_imx->dev, MXC_RPM_TIMEOUT); pm_runtime_use_autosuspend(spi_imx->dev); + pm_runtime_get_noresume(spi_imx->dev); pm_runtime_set_active(spi_imx->dev); pm_runtime_enable(spi_imx->dev); -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Clark Wang <xiaoning.wang@nxp.com> To: broonie@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, nikita.shubin@maquefel.me Cc: linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, festevam@gmail.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH] spi: imx: fix the unbalanced spi runtime pm management Date: Tue, 24 Nov 2020 16:52:47 +0800 [thread overview] Message-ID: <20201124085247.18025-1-xiaoning.wang@nxp.com> (raw) If set active without increase the usage count of pm, the dont use autosuspend function will call the suspend callback to close the two clocks of spi because the usage count is reduced to -1. This will cause the warning dump below when the defer-probe occurs. [ 129.379701] ecspi2_root_clk already disabled [ 129.384005] WARNING: CPU: 1 PID: 33 at drivers/clk/clk.c:952 clk_core_disable+0xa4/0xb0 So add the get noresume function before set active. Fixes: 43b6bf406cd0 spi: imx: fix runtime pm support for !CONFIG_PM Signed-off-by: Clark Wang <xiaoning.wang@nxp.com> --- drivers/spi/spi-imx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 7513ef552d79..73ca821763d6 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -1659,6 +1659,7 @@ static int spi_imx_probe(struct platform_device *pdev) pm_runtime_set_autosuspend_delay(spi_imx->dev, MXC_RPM_TIMEOUT); pm_runtime_use_autosuspend(spi_imx->dev); + pm_runtime_get_noresume(spi_imx->dev); pm_runtime_set_active(spi_imx->dev); pm_runtime_enable(spi_imx->dev); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-11-24 8:52 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-24 8:52 Clark Wang [this message] 2020-11-24 8:52 ` [PATCH] spi: imx: fix the unbalanced spi runtime pm management Clark Wang 2020-11-24 15:37 ` Mark Brown 2020-11-24 15:37 ` Mark Brown
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