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From: Greg KH <gregkh@linuxfoundation.org>
To: Oded Gabbay <oded.gabbay@amd.com>
Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	Alexander.Deucher@amd.com
Subject: Re: [PATCH 1/3] amdkfd: Don't clear *kfd2kgd on kfd_module_init
Date: Sat, 20 Dec 2014 13:25:15 -0800	[thread overview]
Message-ID: <20141220212515.GA30589@kroah.com> (raw)
In-Reply-To: <1419108374-7020-2-git-send-email-oded.gabbay@amd.com>

On Sat, Dec 20, 2014 at 10:46:12PM +0200, Oded Gabbay wrote:
> When amdkfd and radeon are compiled inside the kernel image (not as modules),
> radeon will load before amdkfd and will set *kfd2kgd to its interface
> structure. Therefore, we must not set *kfd2kgd to NULL when amdkfd is loaded
> because it will override radeon's initialization and cause kernel BUG.
> 
> Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
> ---
>  drivers/gpu/drm/amd/amdkfd/kfd_module.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> index 95d5af1..236562f 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> @@ -34,7 +34,7 @@
>  #define KFD_DRIVER_MINOR	7
>  #define KFD_DRIVER_PATCHLEVEL	0
>  
> -const struct kfd2kgd_calls *kfd2kgd;
> +const struct kfd2kgd_calls *kfd2kgd = NULL;

This change does nothing, that is what the original code did already.

thanks,

greg k-h
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dri-devel@lists.freedesktop.org
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WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <gregkh@linuxfoundation.org>
To: Oded Gabbay <oded.gabbay@amd.com>
Cc: dri-devel@lists.freedesktop.org, David Airlie <airlied@linux.ie>,
	Jerome Glisse <j.glisse@gmail.com>,
	Joerg Roedel <joro@8bytes.org>,
	linux-kernel@vger.kernel.org,
	John Bridgman <John.Bridgman@amd.com>,
	Alexander.Deucher@amd.com
Subject: Re: [PATCH 1/3] amdkfd: Don't clear *kfd2kgd on kfd_module_init
Date: Sat, 20 Dec 2014 13:25:15 -0800	[thread overview]
Message-ID: <20141220212515.GA30589@kroah.com> (raw)
In-Reply-To: <1419108374-7020-2-git-send-email-oded.gabbay@amd.com>

On Sat, Dec 20, 2014 at 10:46:12PM +0200, Oded Gabbay wrote:
> When amdkfd and radeon are compiled inside the kernel image (not as modules),
> radeon will load before amdkfd and will set *kfd2kgd to its interface
> structure. Therefore, we must not set *kfd2kgd to NULL when amdkfd is loaded
> because it will override radeon's initialization and cause kernel BUG.
> 
> Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
> ---
>  drivers/gpu/drm/amd/amdkfd/kfd_module.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> index 95d5af1..236562f 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
> @@ -34,7 +34,7 @@
>  #define KFD_DRIVER_MINOR	7
>  #define KFD_DRIVER_PATCHLEVEL	0
>  
> -const struct kfd2kgd_calls *kfd2kgd;
> +const struct kfd2kgd_calls *kfd2kgd = NULL;

This change does nothing, that is what the original code did already.

thanks,

greg k-h

  reply	other threads:[~2014-12-20 21:25 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-12-20 20:46 [PATCH 0/3] Use workqueue for device init in amdkfd Oded Gabbay
2014-12-20 20:46 ` Oded Gabbay
2014-12-20 20:46 ` [PATCH 1/3] amdkfd: Don't clear *kfd2kgd on kfd_module_init Oded Gabbay
2014-12-20 20:46   ` Oded Gabbay
2014-12-20 21:25   ` Greg KH [this message]
2014-12-20 21:25     ` Greg KH
2014-12-21 11:12     ` Oded Gabbay
2014-12-21 11:12       ` Oded Gabbay
2014-12-21 11:27   ` Christian König
2014-12-21 11:27     ` Christian König
2014-12-21 11:34     ` Oded Gabbay
2014-12-21 11:34       ` Oded Gabbay
2014-12-21 12:19       ` Christian König
2014-12-21 12:19         ` Christian König
2014-12-21 13:06         ` Oded Gabbay
2014-12-21 13:06           ` Oded Gabbay
2014-12-21 13:24           ` Oded Gabbay
2014-12-21 13:24             ` Oded Gabbay
2014-12-21 15:57             ` Christian König
2014-12-21 15:57               ` Christian König
2014-12-21 16:03               ` Oded Gabbay
2014-12-21 16:03                 ` Oded Gabbay
2014-12-21 16:10                 ` Christian König
2014-12-21 16:10                   ` Christian König
2014-12-22  7:34                   ` Oded Gabbay
2014-12-22  7:34                     ` Oded Gabbay
2014-12-22  7:40                     ` Dave Airlie
2014-12-22  7:40                       ` Dave Airlie
2014-12-22  7:43                       ` Oded Gabbay
2014-12-22  7:43                         ` Oded Gabbay
2014-12-22  8:57                         ` Christian König
2014-12-22  8:57                           ` Christian König
2014-12-22  9:26                           ` Oded Gabbay
2014-12-22  9:26                             ` Oded Gabbay
2014-12-22 10:22                             ` Oded Gabbay
2014-12-22 10:22                               ` Oded Gabbay
2014-12-20 20:46 ` [PATCH 2/3] amdkfd: Track when amdkfd init is complete Oded Gabbay
2014-12-20 20:46   ` Oded Gabbay
2014-12-20 20:46 ` [PATCH 3/3] amdkfd: Use workqueue for GPU init Oded Gabbay
2014-12-20 20:46   ` Oded Gabbay

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