Hi Geert,
Thank you for the patch.
On Tuesday 09 Aug 2016 17:36:41 Geert Uytterhoeven wrote:
> When resuming from suspend-to-RAM on r8a7795/salvator-x:
>
> dpm_run_callback(): pm_genpd_resume_noirq+0x0/0x90 returns 1
> PM: Device fe940000.fdp1 failed to resume noirq: error 1
> dpm_run_callback(): pm_genpd_resume_noirq+0x0/0x90 returns 1
> PM: Device fe944000.fdp1 failed to resume noirq: error 1
> dpm_run_callback(): pm_genpd_resume_noirq+0x0/0x90 returns 1
> PM: Device fe948000.fdp1 failed to resume noirq: error 1
>
> According to its documentation, rcar_fcp_enable() returns 0 on success
> or a negative error code if an error occurs. Hence
> fdp1_pm_runtime_resume() and vsp1_pm_runtime_resume() forward its return
> value to their callers.
>
> However, rcar_fcp_enable() forwards the return value of
> pm_runtime_get_sync(), which can actually be 1 on success, leading to
> the resume failure above.
>
> To fix this, consider only negative values returned by
> pm_runtime_get_sync() to be failures.
>
> Fixes: 7b49235e83b2347c ("[media] v4l: Add Renesas R-Car FCP driver")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
> drivers/media/platform/rcar-fcp.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/rcar-fcp.c
> b/drivers/media/platform/rcar-fcp.c index
> 0ff6b1edf1dbf677..7e944479205d4059 100644
> --- a/drivers/media/platform/rcar-fcp.c
> +++ b/drivers/media/platform/rcar-fcp.c
> @@ -99,10 +99,16 @@ EXPORT_SYMBOL_GPL(rcar_fcp_put);
> */
> int rcar_fcp_enable(struct rcar_fcp_device *fcp)
> {
> + int error;
I was going to write that the driver uses "ret" instead of "error" for integer
status return values, but it doesn't as there no such value stored in a
variable at all. I will thus argue that it will use that style later, so let's
keep the style consistent with the to-be-written code if you don't mind :-)
Apart from that,
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
and applied to my tree.
> if (!fcp)
> return 0;
>
> - return pm_runtime_get_sync(fcp->dev);
> + error = pm_runtime_get_sync(fcp->dev);
> + if (error < 0)
> + return error;
> +
> + return 0;
> }
> EXPORT_SYMBOL_GPL(rcar_fcp_enable);
--
Regards,
Laurent Pinchart
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