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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Adrian Hunter <adrian.hunter@intel.com>
Cc: "Rafael J . Wysocki" <rafael@kernel.org>,
	Saravana Kannan <saravanak@google.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	"James E . J . Bottomley" <jejb@linux.ibm.com>,
	linux-scsi@vger.kernel.org, Avri Altman <avri.altman@wdc.com>,
	Bean Huo <huobean@gmail.com>, Can Guo <cang@codeaurora.org>,
	Asutosh Das <asutoshd@codeaurora.org>,
	Bart Van Assche <bvanassche@acm.org>,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH V4 1/2] driver core: Prevent warning when removing a device link from unregistered consumer
Date: Wed, 21 Jul 2021 17:29:16 +0200	[thread overview]
Message-ID: <YPg9TBLElQqcn3PS@kroah.com> (raw)
In-Reply-To: <20210716114408.17320-2-adrian.hunter@intel.com>

On Fri, Jul 16, 2021 at 02:44:07PM +0300, Adrian Hunter wrote:
> sysfs_remove_link() causes a warning if the parent directory does not
> exist. That can happen if the device link consumer has not been registered.
> So do not attempt sysfs_remove_link() in that case.
> 
> Fixes: 287905e68dd29 ("driver core: Expose device link details in sysfs")
> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
> Cc: stable@vger.kernel.org # 5.9+
> Reviewed-by: Rafael J. Wysocki <rafael@kernel.org>
> ---
>  drivers/base/core.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/base/core.c b/drivers/base/core.c
> index ea5b85354526..2de8f7d8cf54 100644
> --- a/drivers/base/core.c
> +++ b/drivers/base/core.c
> @@ -575,8 +575,10 @@ static void devlink_remove_symlinks(struct device *dev,
>  		return;
>  	}
>  
> -	snprintf(buf, len, "supplier:%s:%s", dev_bus_name(sup), dev_name(sup));
> -	sysfs_remove_link(&con->kobj, buf);
> +	if (device_is_registered(con)) {
> +		snprintf(buf, len, "supplier:%s:%s", dev_bus_name(sup), dev_name(sup));
> +		sysfs_remove_link(&con->kobj, buf);
> +	}
>  	snprintf(buf, len, "consumer:%s:%s", dev_bus_name(con), dev_name(con));
>  	sysfs_remove_link(&sup->kobj, buf);
>  	kfree(buf);
> -- 
> 2.17.1
> 

I've applied this patch to my tree now.

thanks,

greg k-h

  reply	other threads:[~2021-07-21 15:29 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-16 11:44 [PATCH V4 0/2] driver core: Add ability to delete device links of unregistered devices Adrian Hunter
2021-07-16 11:44 ` [PATCH V4 1/2] driver core: Prevent warning when removing a device link from unregistered consumer Adrian Hunter
2021-07-21 15:29   ` Greg Kroah-Hartman [this message]
2021-07-16 11:44 ` [PATCH V4 2/2] scsi: ufshcd: Fix device links when BOOT WLUN fails to probe Adrian Hunter
2021-07-17 18:02   ` Avri Altman
2021-08-02  5:45     ` Adrian Hunter
2021-08-02  7:03       ` Avri Altman
2021-08-04 15:33   ` Adrian Hunter
2021-08-05 21:49     ` Bart Van Assche
2021-08-06  2:50       ` Martin K. Petersen
2021-08-06 12:59         ` Adrian Hunter
2021-08-06 13:04           ` [PATCH V5] " Adrian Hunter
2021-08-10  3:21             ` Martin K. Petersen
2021-08-17  3:17             ` Martin K. Petersen

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