| Message ID | 20240831021334.1907921-11-lizetao1@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | net: Convert using devm_clk_get_enabled()/devm_clk_get_optional_enabled() | expand |
> -----Original Message----- > From: Li Zetao <lizetao1@huawei.com> > Sent: Saturday, August 31, 2024 7:44 AM > To: florian.fainelli@broadcom.com; andrew@lunn.ch; olteanv@gmail.com; > davem@davemloft.net; edumazet@google.com; kuba@kernel.org; > pabeni@redhat.com; wens@csie.org; jernej.skrabec@gmail.com; > samuel@sholland.org; heiko@sntech.de; yisen.zhuang@huawei.com; > salil.mehta@huawei.com; hauke@hauke-m.de; > alexandre.torgue@foss.st.com; joabreu@synopsys.com; > mcoquelin.stm32@gmail.com; wellslutw@gmail.com; Pandey, Radhey > Shyam <radhey.shyam.pandey@amd.com>; Simek, Michal > <michal.simek@amd.com>; ajay.kathat@microchip.com; > claudiu.beznea@tuxon.dev; kvalo@kernel.org; lizetao1@huawei.com; > u.kleine-koenig@pengutronix.de; jacky_chou@aspeedtech.com > Cc: netdev@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux- > sunxi@lists.linux.dev; linux-rockchip@lists.infradead.org; linux-stm32@st- > md-mailman.stormreply.com; linux-wireless@vger.kernel.org > Subject: [PATCH net-next 10/12] net: xilinx: axienet: Convert using > devm_clk_get_optional_enabled() in axienet_probe() > > Use devm_clk_get_optional_enabled() instead of devm_clk_get_optional() + > clk_prepare_enable(), which can make the clk consistent with the device life > cycle and reduce the risk of unreleased clk resources. Since the device > framework has automatically released the clk resource, there is no need to > execute clk_disable_unprepare(clk) on the error path. > > Signed-off-by: Li Zetao <lizetao1@huawei.com> Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com> Thanks! > --- > drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 15 ++++----------- > 1 file changed, 4 insertions(+), 11 deletions(-) > > diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c > b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c > index fe6a0e2e463f..48b41e95aa74 100644 > --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c > +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c > @@ -2584,22 +2584,17 @@ static int axienet_probe(struct platform_device > *pdev) > seqcount_mutex_init(&lp->hw_stats_seqcount, &lp->stats_lock); > INIT_DEFERRABLE_WORK(&lp->stats_work, axienet_refresh_stats); > > - lp->axi_clk = devm_clk_get_optional(&pdev->dev, "s_axi_lite_clk"); > - if (!lp->axi_clk) { > + lp->axi_clk = devm_clk_get_optional_enabled(&pdev->dev, > "s_axi_lite_clk"); > + if (!lp->axi_clk) > /* For backward compatibility, if named AXI clock is not > present, > * treat the first clock specified as the AXI clock. > */ > - lp->axi_clk = devm_clk_get_optional(&pdev->dev, NULL); > - } > + lp->axi_clk = devm_clk_get_optional_enabled(&pdev->dev, > NULL); > + > if (IS_ERR(lp->axi_clk)) { > ret = PTR_ERR(lp->axi_clk); > goto free_netdev; > } > - ret = clk_prepare_enable(lp->axi_clk); > - if (ret) { > - dev_err(&pdev->dev, "Unable to enable AXI clock: %d\n", > ret); > - goto free_netdev; > - } > > lp->misc_clks[0].id = "axis_clk"; > lp->misc_clks[1].id = "ref_clk"; > @@ -2915,7 +2910,6 @@ static int axienet_probe(struct platform_device > *pdev) > axienet_mdio_teardown(lp); > cleanup_clk: I also find that there is goto to cleanup_clk when devm_clk_bulk_get_optional/ clk_bulk_prepare_enable fails which is not correct but as it is existing bug it can go a separate patch. > clk_bulk_disable_unprepare(XAE_NUM_MISC_CLOCKS, lp- > >misc_clks); > - clk_disable_unprepare(lp->axi_clk); > > free_netdev: > free_netdev(ndev); > @@ -2939,7 +2933,6 @@ static void axienet_remove(struct platform_device > *pdev) > axienet_mdio_teardown(lp); > > clk_bulk_disable_unprepare(XAE_NUM_MISC_CLOCKS, lp- > >misc_clks); > - clk_disable_unprepare(lp->axi_clk); > > free_netdev(ndev); > } > -- > 2.34.1
在 2024/9/1 20:28, Pandey, Radhey Shyam 写道: >> -----Original Message----- >> From: Li Zetao <lizetao1@huawei.com> >> Sent: Saturday, August 31, 2024 7:44 AM >> To: florian.fainelli@broadcom.com; andrew@lunn.ch; olteanv@gmail.com; >> davem@davemloft.net; edumazet@google.com; kuba@kernel.org; >> pabeni@redhat.com; wens@csie.org; jernej.skrabec@gmail.com; >> samuel@sholland.org; heiko@sntech.de; yisen.zhuang@huawei.com; >> salil.mehta@huawei.com; hauke@hauke-m.de; >> alexandre.torgue@foss.st.com; joabreu@synopsys.com; >> mcoquelin.stm32@gmail.com; wellslutw@gmail.com; Pandey, Radhey >> Shyam <radhey.shyam.pandey@amd.com>; Simek, Michal >> <michal.simek@amd.com>; ajay.kathat@microchip.com; >> claudiu.beznea@tuxon.dev; kvalo@kernel.org; lizetao1@huawei.com; >> u.kleine-koenig@pengutronix.de; jacky_chou@aspeedtech.com >> Cc: netdev@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux- >> sunxi@lists.linux.dev; linux-rockchip@lists.infradead.org; linux-stm32@st- >> md-mailman.stormreply.com; linux-wireless@vger.kernel.org >> Subject: [PATCH net-next 10/12] net: xilinx: axienet: Convert using >> devm_clk_get_optional_enabled() in axienet_probe() >> >> Use devm_clk_get_optional_enabled() instead of devm_clk_get_optional() + >> clk_prepare_enable(), which can make the clk consistent with the device life >> cycle and reduce the risk of unreleased clk resources. Since the device >> framework has automatically released the clk resource, there is no need to >> execute clk_disable_unprepare(clk) on the error path. >> >> Signed-off-by: Li Zetao <lizetao1@huawei.com> > > Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com> > Thanks! > >> --- >> drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 15 ++++----------- >> 1 file changed, 4 insertions(+), 11 deletions(-) >> >> diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c >> b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c >> index fe6a0e2e463f..48b41e95aa74 100644 >> --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c >> +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c >> @@ -2584,22 +2584,17 @@ static int axienet_probe(struct platform_device >> *pdev) >> seqcount_mutex_init(&lp->hw_stats_seqcount, &lp->stats_lock); >> INIT_DEFERRABLE_WORK(&lp->stats_work, axienet_refresh_stats); >> >> - lp->axi_clk = devm_clk_get_optional(&pdev->dev, "s_axi_lite_clk"); >> - if (!lp->axi_clk) { >> + lp->axi_clk = devm_clk_get_optional_enabled(&pdev->dev, >> "s_axi_lite_clk"); >> + if (!lp->axi_clk) >> /* For backward compatibility, if named AXI clock is not >> present, >> * treat the first clock specified as the AXI clock. >> */ >> - lp->axi_clk = devm_clk_get_optional(&pdev->dev, NULL); >> - } >> + lp->axi_clk = devm_clk_get_optional_enabled(&pdev->dev, >> NULL); >> + >> if (IS_ERR(lp->axi_clk)) { >> ret = PTR_ERR(lp->axi_clk); >> goto free_netdev; >> } >> - ret = clk_prepare_enable(lp->axi_clk); >> - if (ret) { >> - dev_err(&pdev->dev, "Unable to enable AXI clock: %d\n", >> ret); >> - goto free_netdev; >> - } >> >> lp->misc_clks[0].id = "axis_clk"; >> lp->misc_clks[1].id = "ref_clk"; >> @@ -2915,7 +2910,6 @@ static int axienet_probe(struct platform_device >> *pdev) >> axienet_mdio_teardown(lp); >> cleanup_clk: > > I also find that there is goto to cleanup_clk when devm_clk_bulk_get_optional/ > clk_bulk_prepare_enable fails which is not correct but as it is existing bug it > can go a separate patch. Thanks for the reminder, I considered solving this problem by using devm_add_action_or_reset Thanks, Li Zetao. > >> clk_bulk_disable_unprepare(XAE_NUM_MISC_CLOCKS, lp- >>> misc_clks); >> - clk_disable_unprepare(lp->axi_clk); >> >> free_netdev: >> free_netdev(ndev); >> @@ -2939,7 +2933,6 @@ static void axienet_remove(struct platform_device >> *pdev) >> axienet_mdio_teardown(lp); >> >> clk_bulk_disable_unprepare(XAE_NUM_MISC_CLOCKS, lp- >>> misc_clks); >> - clk_disable_unprepare(lp->axi_clk); >> >> free_netdev(ndev); >> } >> -- >> 2.34.1 >
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index fe6a0e2e463f..48b41e95aa74 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -2584,22 +2584,17 @@ static int axienet_probe(struct platform_device *pdev) seqcount_mutex_init(&lp->hw_stats_seqcount, &lp->stats_lock); INIT_DEFERRABLE_WORK(&lp->stats_work, axienet_refresh_stats); - lp->axi_clk = devm_clk_get_optional(&pdev->dev, "s_axi_lite_clk"); - if (!lp->axi_clk) { + lp->axi_clk = devm_clk_get_optional_enabled(&pdev->dev, "s_axi_lite_clk"); + if (!lp->axi_clk) /* For backward compatibility, if named AXI clock is not present, * treat the first clock specified as the AXI clock. */ - lp->axi_clk = devm_clk_get_optional(&pdev->dev, NULL); - } + lp->axi_clk = devm_clk_get_optional_enabled(&pdev->dev, NULL); + if (IS_ERR(lp->axi_clk)) { ret = PTR_ERR(lp->axi_clk); goto free_netdev; } - ret = clk_prepare_enable(lp->axi_clk); - if (ret) { - dev_err(&pdev->dev, "Unable to enable AXI clock: %d\n", ret); - goto free_netdev; - } lp->misc_clks[0].id = "axis_clk"; lp->misc_clks[1].id = "ref_clk"; @@ -2915,7 +2910,6 @@ static int axienet_probe(struct platform_device *pdev) axienet_mdio_teardown(lp); cleanup_clk: clk_bulk_disable_unprepare(XAE_NUM_MISC_CLOCKS, lp->misc_clks); - clk_disable_unprepare(lp->axi_clk); free_netdev: free_netdev(ndev); @@ -2939,7 +2933,6 @@ static void axienet_remove(struct platform_device *pdev) axienet_mdio_teardown(lp); clk_bulk_disable_unprepare(XAE_NUM_MISC_CLOCKS, lp->misc_clks); - clk_disable_unprepare(lp->axi_clk); free_netdev(ndev); }
Use devm_clk_get_optional_enabled() instead of devm_clk_get_optional() + clk_prepare_enable(), which can make the clk consistent with the device life cycle and reduce the risk of unreleased clk resources. Since the device framework has automatically released the clk resource, there is no need to execute clk_disable_unprepare(clk) on the error path. Signed-off-by: Li Zetao <lizetao1@huawei.com> --- drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-)