On Thursday 26 February 2015 14:49:51 Pali Rohár wrote:
> Without this patch function pm_runtime_get_sync() returns 0 even when some
> omap subfunction fails. This patch properly propagate error codes from omap
> functions back to caller.
>
> This patch fix problem, when loading omap-aes driver in qemu cause kernel oops.
>
> Signed-off-by: Pali Rohár <pali.rohar@xxxxxxxxx>
> ---
> arch/arm/mach-omap2/omap_device.c | 30 +++++++++++++++++-------------
> arch/arm/mach-omap2/omap_hwmod.c | 10 ++++++----
> 2 files changed, 23 insertions(+), 17 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
> index be9541e..9fd47a9 100644
> --- a/arch/arm/mach-omap2/omap_device.c
> +++ b/arch/arm/mach-omap2/omap_device.c
> @@ -224,13 +224,13 @@ static int _omap_device_notifier_call(struct notifier_block *nb,
> */
> static int _omap_device_enable_hwmods(struct omap_device *od)
> {
> + int ret = 0;
> int i;
>
> for (i = 0; i < od->hwmods_cnt; i++)
> - omap_hwmod_enable(od->hwmods[i]);
> + ret |= omap_hwmod_enable(od->hwmods[i]);
>
> - /* XXX pass along return value here? */
> - return 0;
> + return ret;
> }
>
> /**
> @@ -241,13 +241,13 @@ static int _omap_device_enable_hwmods(struct omap_device *od)
> */
> static int _omap_device_idle_hwmods(struct omap_device *od)
> {
> + int ret = 0;
> int i;
>
> for (i = 0; i < od->hwmods_cnt; i++)
> - omap_hwmod_idle(od->hwmods[i]);
> + ret |= omap_hwmod_idle(od->hwmods[i]);
>
> - /* XXX pass along return value here? */
> - return 0;
> + return ret;
> }
>
> /* Public functions for use by core code */
> @@ -595,18 +595,20 @@ static int _od_runtime_suspend(struct device *dev)
> int ret;
>
> ret = pm_generic_runtime_suspend(dev);
> + if (ret)
> + return ret;
>
> - if (!ret)
> - omap_device_idle(pdev);
> -
> - return ret;
> + return omap_device_idle(pdev);
> }
>
> static int _od_runtime_resume(struct device *dev)
> {
> struct platform_device *pdev = to_platform_device(dev);
> + int ret;
>
> - omap_device_enable(pdev);
> + ret = omap_device_enable(pdev);
> + if (ret)
> + return ret;
>
> return pm_generic_runtime_resume(dev);
> }
> @@ -740,7 +742,8 @@ int omap_device_enable(struct platform_device *pdev)
>
> ret = _omap_device_enable_hwmods(od);
>
> - od->_state = OMAP_DEVICE_STATE_ENABLED;
> + if (ret == 0)
> + od->_state = OMAP_DEVICE_STATE_ENABLED;
>
> return ret;
> }
> @@ -770,7 +773,8 @@ int omap_device_idle(struct platform_device *pdev)
>
> ret = _omap_device_idle_hwmods(od);
>
> - od->_state = OMAP_DEVICE_STATE_IDLE;
> + if (ret == 0)
> + od->_state = OMAP_DEVICE_STATE_IDLE;
>
> return ret;
> }
> diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
> index 92afb72..870e984 100644
> --- a/arch/arm/mach-omap2/omap_hwmod.c
> +++ b/arch/arm/mach-omap2/omap_hwmod.c
> @@ -3350,16 +3350,17 @@ int omap_hwmod_enable(struct omap_hwmod *oh)
> */
> int omap_hwmod_idle(struct omap_hwmod *oh)
> {
> + int r;
> unsigned long flags;
>
> if (!oh)
> return -EINVAL;
>
> spin_lock_irqsave(&oh->_lock, flags);
> - _idle(oh);
> + r = _idle(oh);
> spin_unlock_irqrestore(&oh->_lock, flags);
>
> - return 0;
> + return r;
> }
>
> /**
> @@ -3372,16 +3373,17 @@ int omap_hwmod_idle(struct omap_hwmod *oh)
> */
> int omap_hwmod_shutdown(struct omap_hwmod *oh)
> {
> + int r;
> unsigned long flags;
>
> if (!oh)
> return -EINVAL;
>
> spin_lock_irqsave(&oh->_lock, flags);
> - _shutdown(oh);
> + r = _shutdown(oh);
> spin_unlock_irqrestore(&oh->_lock, flags);
>
> - return 0;
> + return r;
> }
>
> /*
Hello Paul, can you apply this patch?
--
Pali Rohár
pali.rohar@xxxxxxxxx
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