Sanjeev Premi <premi@xxxxxx> writes:
> This patch checks if clk_get() returned success for
> the clocks used in function omap2_clk_arch_init().
>
> Signed-off-by: Sanjeev Premi <premi@xxxxxx>
> ---
> arch/arm/mach-omap2/clock34xx.c | 25 +++++++++++++++++++++++--
> 1 files changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c
> index d4217b9..2c2165b 100644
> --- a/arch/arm/mach-omap2/clock34xx.c
> +++ b/arch/arm/mach-omap2/clock34xx.c
> @@ -316,17 +316,38 @@ static int __init omap2_clk_arch_init(void)
> {
> struct clk *osc_sys_ck, *dpll1_ck, *arm_fck, *core_ck;
> unsigned long osc_sys_rate;
> + short err = 0 ;
>
> if (!mpurate)
> return -EINVAL;
>
> - /* XXX test these for success */
> dpll1_ck = clk_get(NULL, "dpll1_ck");
> + if (dpll1_ck == NULL) {
All of these checks should be of the form
if (IS_ERR(<clk>))
instead of NULL pointer checks.
You could also do something more compact like this, which takes
care of the error check and warning print:
if (WARN(IS_ERR(<clk ptr>), "Failed to get <name>\n"))
> + err = 1;
> + pr_err("*** Failed to get dpll1_ck.\n");
> + }
> +
> arm_fck = clk_get(NULL, "arm_fck");
> + if (arm_fck == NULL) {
> + err = 1;
> + pr_err("*** Failed to get arm_fck.\n");
> + }
> +
> core_ck = clk_get(NULL, "core_ck");
> + if (core_ck == NULL) {
> + err = 1;
> + pr_err("*** Failed to get core_ck.\n");
> + }
> +
> osc_sys_ck = clk_get(NULL, "osc_sys_ck");
> + if (osc_sys_ck == NULL) {
> + err = 1;
> + pr_err("*** Failed to get osc_sys_ck.\n");
> + }
> +
> + if (err)
> + return 1;
Minor issue...
Do you want to skip the rest of the init in case of any failure?
It seems like the DPLL1 is the only one that would be a real failure,
the others just affect the clock display.
Kevin
> - /* REVISIT: not yet ready for 343x */
> if (clk_set_rate(dpll1_ck, mpurate))
> printk(KERN_ERR "*** Unable to set MPU rate\n");
>
> --
> 1.6.2.2
>
> --
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