3.13-stable review patch. If anyone has any objections, please let me know. ------------------ From: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> commit e7c57ecd6019cc6392223605aed18cce257c3eff upstream. Since commit 9e8147bb5ec5d1dda2141da70f96b98985a306cb "ARM: imx6q: move low-power code out of clock driver" the kernel fails to boot on i.MX6Q/D if preemption is enabled (CONFIG_PREEMPT=y). The kernel just hangs before the console comes up. The above commit moved the initalization of the low-power mode setting (enabling clocked WAIT states), which was introduced in commit 83ae20981ae924c37d02a42c829155fc3851260c "ARM: imx: correct low-power mode setting", from imx6q_clks_init to imx6q_pm_init. Now it is called much later, after all cores are enabled. This patch moves the low-power mode initialization back to imx6q_clks_init again (and to imx6sl_clks_init). Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx> Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/arm/mach-imx/clk-imx6q.c | 3 +++ arch/arm/mach-imx/clk-imx6sl.c | 3 +++ arch/arm/mach-imx/pm-imx6q.c | 2 -- 3 files changed, 6 insertions(+), 2 deletions(-) --- a/arch/arm/mach-imx/clk-imx6q.c +++ b/arch/arm/mach-imx/clk-imx6q.c @@ -479,6 +479,9 @@ static void __init imx6q_clocks_init(str if (IS_ENABLED(CONFIG_PCI_IMX6)) clk_set_parent(clk[lvds1_sel], clk[sata_ref]); + /* Set initial power mode */ + imx6q_set_lpm(WAIT_CLOCKED); + np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-gpt"); base = of_iomap(np, 0); WARN_ON(!base); --- a/arch/arm/mach-imx/clk-imx6sl.c +++ b/arch/arm/mach-imx/clk-imx6sl.c @@ -261,6 +261,9 @@ static void __init imx6sl_clocks_init(st clk_prepare_enable(clks[IMX6SL_CLK_USBPHY2_GATE]); } + /* Set initial power mode */ + imx6q_set_lpm(WAIT_CLOCKED); + np = of_find_compatible_node(NULL, NULL, "fsl,imx6sl-gpt"); base = of_iomap(np, 0); WARN_ON(!base); --- a/arch/arm/mach-imx/pm-imx6q.c +++ b/arch/arm/mach-imx/pm-imx6q.c @@ -228,8 +228,6 @@ void __init imx6q_pm_init(void) regmap_update_bits(gpr, IOMUXC_GPR1, IMX6Q_GPR1_GINT, IMX6Q_GPR1_GINT); - /* Set initial power mode */ - imx6q_set_lpm(WAIT_CLOCKED); suspend_set_ops(&imx6q_pm_ops); } -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html