Re: [PATCH] iommu: silence iommu group prints

[Lu Baolu <baolu.lu@linux.intel.com>]

Hi,

On 2020/2/27 19:57, Russell King wrote:
> On the LX2160A, there are lots (about 160) of IOMMU messages produced
> during boot; this is excessive.  Reduce the severity of these messages
> to debug level.
> 
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> ---
>   drivers/iommu/iommu.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
> index 3ead597e1c57..304281ec623b 100644
> --- a/drivers/iommu/iommu.c
> +++ b/drivers/iommu/iommu.c
> @@ -741,7 +741,7 @@ int iommu_group_add_device(struct iommu_group *group, struct device *dev)
>   
>   	trace_add_device_to_group(group->id, dev);
>   
> -	dev_info(dev, "Adding to iommu group %d\n", group->id);
> +	dev_dbg(dev, "Adding to iommu group %d\n", group->id);

I'm not strongly against this. But to me this message seems to be a good
indicator that a device was probed successfully by the iommu subsystem.
Keeping it in the default kernel message always helps to the kernel
debugging.

Best regards,
baolu
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu