From: Tero Kristo <t-kristo@xxxxxx> commit b070f9ca78680486927b799cf6126b128a7c2c1b upstream. omap_hwmod_get_pwrdm() may access a NULL clk_hw pointer in some failure cases. Add a check for the case and bail out gracely if this happens. Reported-by: Dan Murphy <dmurphy@xxxxxx> Signed-off-by: Tero Kristo <t-kristo@xxxxxx> Cc: stable@xxxxxxxxxxxxxxx # v5.10+ Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxxxx> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/arm/mach-omap2/omap_hwmod.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -3777,6 +3777,7 @@ struct powerdomain *omap_hwmod_get_pwrdm struct omap_hwmod_ocp_if *oi; struct clockdomain *clkdm; struct clk_hw_omap *clk; + struct clk_hw *hw; if (!oh) return NULL; @@ -3793,7 +3794,14 @@ struct powerdomain *omap_hwmod_get_pwrdm c = oi->_clk; } - clk = to_clk_hw_omap(__clk_get_hw(c)); + hw = __clk_get_hw(c); + if (!hw) + return NULL; + + clk = to_clk_hw_omap(hw); + if (!clk) + return NULL; + clkdm = clk->clkdm; if (!clkdm) return NULL;
