From mboxrd@z Thu Jan 1 00:00:00 1970 From: khilman@baylibre.com (Kevin Hilman) Date: Mon, 27 Feb 2017 19:08:29 -0800 Subject: [PATCH] mmc: meson-gx: fix error path when driver initialization fails before enabling clocks In-Reply-To: <20170218170647.5860-1-webczat@webczatnet.pl> (=?utf-8?Q?=22M?= =?utf-8?Q?icha=C5=82?= Zegan"'s message of "Sat, 18 Feb 2017 18:06:46 +0100") References: <20170218170647.5860-1-webczat@webczatnet.pl> Message-ID: To: linus-amlogic@lists.infradead.org List-Id: linus-amlogic.lists.infradead.org Micha? Zegan writes: > This patch fixes the case where meson_mmc_probe function fails before > core_clk is enabled. > Originally, that would result in a try to disable the core clock, and if > it was not already enabled, it would result in a kernel warning. > This issue is similar to the one with div_clk. > Fix it by introducing another error path used only between successfully > enabling the core clock, and successfully enabling the div clock. > That would ensure that core clock is disabled only if it was enabled before. > > Signed-off-by: Micha? Zegan Acked-by: Kevin Hilman > --- > applies on top of Heiner's patchset v3 > https://patchwork.kernel.org/patch/9581057/ > That in turn applies on top of https://patchwork.kernel.org/patch/9561215/ > > drivers/mmc/host/meson-gx-mmc.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c > index 336b6a2e94c6..7917a3fe51ad 100644 > --- a/drivers/mmc/host/meson-gx-mmc.c > +++ b/drivers/mmc/host/meson-gx-mmc.c > @@ -752,7 +752,7 @@ static int meson_mmc_probe(struct platform_device *pdev) > > ret = meson_mmc_clk_init(host); > if (ret) > - goto free_host; > + goto err_core_clk; > > ret = devm_request_threaded_irq(&pdev->dev, irq, meson_mmc_irq, > meson_mmc_irq_thread, IRQF_SHARED, > @@ -781,8 +781,9 @@ static int meson_mmc_probe(struct platform_device *pdev) > > err_div_clk: > clk_disable_unprepare(host->cfg_div_clk); > -free_host: > +err_core_clk: > clk_disable_unprepare(host->core_clk); > +free_host: > mmc_free_host(mmc); > return ret; > }