Re: [PATCH] PCI: pciehp: Always protect pciehp_disable_slot() with hotplug mutex

[Bjorn Helgaas <helgaas@kernel.org>]

On Sun, Nov 01, 2015 at 01:58:40PM -0800, Guenter Roeck wrote:
> When called from pciehp_sysfs_disable_slot(), the call to
> pciehp_disable_slot() was not protected by the hotplug mutex.
> 
> Cc: Rajat Jain <rajatxjain@gmail.com>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Applied with Rajat's Reviewed-by to pci/hotplug for v4.5, thanks!

> ---
>  drivers/pci/hotplug/pciehp_ctrl.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
> index 4c8f4cde6854..880978b6d534 100644
> --- a/drivers/pci/hotplug/pciehp_ctrl.c
> +++ b/drivers/pci/hotplug/pciehp_ctrl.c
> @@ -511,7 +511,9 @@ int pciehp_sysfs_disable_slot(struct slot *p_slot)
>  	case STATIC_STATE:
>  		p_slot->state = POWEROFF_STATE;
>  		mutex_unlock(&p_slot->lock);
> +		mutex_lock(&p_slot->hotplug_lock);
>  		retval = pciehp_disable_slot(p_slot);
> +		mutex_unlock(&p_slot->hotplug_lock);
>  		mutex_lock(&p_slot->lock);
>  		p_slot->state = STATIC_STATE;
>  		break;
> -- 
> 2.1.4
> 
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