[PATCH] memory: exynos5422-dmc: handle clock enable failures
Jiawen Liu <[email protected]>
| Newsgroups | org.kernel.vger.linux-samsung-soc,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pm |
|---|---|
| Message-ID | <[email protected]> |
Check clock-enable failures during probe. If a later clock cannot be enabled, unwind clocks already enabled on that path before returning the error. Signed-off-by: jiawen <[email protected]> --- diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c --- a/drivers/memory/samsung/exynos5422-dmc.c +++ b/drivers/memory/samsung/exynos5422-dmc.c @@ -1297,8 +1297,15 @@ if (ret) return ret; - clk_prepare_enable(dmc->fout_bpll); - clk_prepare_enable(dmc->mout_bpll); + ret = clk_prepare_enable(dmc->fout_bpll); + if (ret) + return ret; + + ret = clk_prepare_enable(dmc->mout_bpll); + if (ret) { + clk_disable_unprepare(dmc->fout_bpll); + return ret; + } /* * Some bootloaders do not set clock routes correctly.