[PATCH] drm/amd/amdgpu: Fix potential ioremap() memory leaks in amdgpu_device_init()
Christian König
christian.koenig at amd.com
Mon Feb 26 08:16:46 UTC 2024
Am 24.02.24 um 07:38 schrieb Srinivasan Shanmugam:
> This ensures that the memory mapped by ioremap for adev->rmmio, is
> properly handled in amdgpu_device_init(). If the function exits early
> due to an error, the memory is unmapped. If the function completes
> successfully, the memory remains mapped.
>
> Fixes the below:
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:4337 amdgpu_device_init() warn: 'adev->rmmio' from ioremap() not released on lines: 4035,4045,4051,4058,4068,4337
Hui? How do you got that warning?
>
> Cc: Christian König <christian.koenig at amd.com>
> Cc: Alex Deucher <alexander.deucher at amd.com>
> Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 18 ++++++++++++++----
> 1 file changed, 14 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 1ef892bea488..68bf5e910cb8 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -4031,8 +4031,10 @@ int amdgpu_device_init(struct amdgpu_device *adev,
> * early on during init and before calling to RREG32.
> */
> adev->reset_domain = amdgpu_reset_create_reset_domain(SINGLE_DEVICE, "amdgpu-reset-dev");
> - if (!adev->reset_domain)
> + if (!adev->reset_domain) {
> + iounmap(adev->rmmio);
> return -ENOMEM;
> + }
Please use a goto label and error handling instead. Apart from that
looks good to me.
Regards,
Christian.
>
> /* detect hw virtualization here */
> amdgpu_detect_virtualization(adev);
> @@ -4042,20 +4044,25 @@ int amdgpu_device_init(struct amdgpu_device *adev,
> r = amdgpu_device_get_job_timeout_settings(adev);
> if (r) {
> dev_err(adev->dev, "invalid lockup_timeout parameter syntax\n");
> + iounmap(adev->rmmio);
> return r;
> }
>
> /* early init functions */
> r = amdgpu_device_ip_early_init(adev);
> - if (r)
> + if (r) {
> + iounmap(adev->rmmio);
> return r;
> + }
>
> amdgpu_device_set_mcbp(adev);
>
> /* Get rid of things like offb */
> r = drm_aperture_remove_conflicting_pci_framebuffers(adev->pdev, &amdgpu_kms_driver);
> - if (r)
> + if (r) {
> + iounmap(adev->rmmio);
> return r;
> + }
>
> /* Enable TMZ based on IP_VERSION */
> amdgpu_gmc_tmz_set(adev);
> @@ -4064,8 +4071,10 @@ int amdgpu_device_init(struct amdgpu_device *adev,
> /* Need to get xgmi info early to decide the reset behavior*/
> if (adev->gmc.xgmi.supported) {
> r = adev->gfxhub.funcs->get_xgmi_info(adev);
> - if (r)
> + if (r) {
> + iounmap(adev->rmmio);
> return r;
> + }
> }
>
> /* enable PCIE atomic ops */
> @@ -4334,6 +4343,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
> failed:
> amdgpu_vf_error_trans_all(adev);
>
> + iounmap(adev->rmmio);
> return r;
> }
>
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