lkml.org 
[lkml]   [2015]   [Nov]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] PCI: pciehp: Always protect pciehp_disable_slot() with hotplug mutex
From
Date
On 11/04/2015 06:59 PM, Rajat Jain wrote:
> Geez... I wonder how did I miss it. Thanks for fixing this.
> Looks good to me.
>
Hi Rajat,

easy to miss. I only found it accidentally.

Thanks a lot for the review!

Guenter

> Reviewed-by: Rajat Jain <rajatxjain@gmail.com <mailto:rajatxjain@gmail.com>>
>
> On Sun, Nov 1, 2015 at 1:58 PM, Guenter Roeck <linux@roeck-us.net <mailto:linux@roeck-us.net>> 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 <mailto:rajatxjain@gmail.com>>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net <mailto:linux@roeck-us.net>>
> ---
> 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
>
>



\
 
 \ /
  Last update: 2015-11-05 06:41    [W:0.058 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site