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SubjectRe: [PATCH v4] drm/amdgpu: fix multiple memory leaks in acp_hw_init
Date
Am 02.10.19 um 05:46 schrieb Navid Emamdoost:
> In acp_hw_init there are some allocations that needs to be released in
> case of failure:
>
> 1- adev->acp.acp_genpd should be released if any allocation attemp for
> adev->acp.acp_cell, adev->acp.acp_res or i2s_pdata fails.
> 2- all of those allocations should be released if
> mfd_add_hotplug_devices or pm_genpd_add_device fail.
> 3- Release is needed in case of time out values expire.
>
> Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>

Reviewed-by: Christian König <christian.koenig@amd.com>

> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c | 34 ++++++++++++++++---------
> 1 file changed, 22 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
> index eba42c752bca..82155ac3288a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
> @@ -189,7 +189,7 @@ static int acp_hw_init(void *handle)
> u32 val = 0;
> u32 count = 0;
> struct device *dev;
> - struct i2s_platform_data *i2s_pdata;
> + struct i2s_platform_data *i2s_pdata = NULL;
>
> struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>
> @@ -231,20 +231,21 @@ static int acp_hw_init(void *handle)
> adev->acp.acp_cell = kcalloc(ACP_DEVS, sizeof(struct mfd_cell),
> GFP_KERNEL);
>
> - if (adev->acp.acp_cell == NULL)
> - return -ENOMEM;
> + if (adev->acp.acp_cell == NULL) {
> + r = -ENOMEM;
> + goto failure;
> + }
>
> adev->acp.acp_res = kcalloc(5, sizeof(struct resource), GFP_KERNEL);
> if (adev->acp.acp_res == NULL) {
> - kfree(adev->acp.acp_cell);
> - return -ENOMEM;
> + r = -ENOMEM;
> + goto failure;
> }
>
> i2s_pdata = kcalloc(3, sizeof(struct i2s_platform_data), GFP_KERNEL);
> if (i2s_pdata == NULL) {
> - kfree(adev->acp.acp_res);
> - kfree(adev->acp.acp_cell);
> - return -ENOMEM;
> + r = -ENOMEM;
> + goto failure;
> }
>
> switch (adev->asic_type) {
> @@ -341,14 +342,14 @@ static int acp_hw_init(void *handle)
> r = mfd_add_hotplug_devices(adev->acp.parent, adev->acp.acp_cell,
> ACP_DEVS);
> if (r)
> - return r;
> + goto failure;
>
> for (i = 0; i < ACP_DEVS ; i++) {
> dev = get_mfd_cell_dev(adev->acp.acp_cell[i].name, i);
> r = pm_genpd_add_device(&adev->acp.acp_genpd->gpd, dev);
> if (r) {
> dev_err(dev, "Failed to add dev to genpd\n");
> - return r;
> + goto failure;
> }
> }
>
> @@ -367,7 +368,8 @@ static int acp_hw_init(void *handle)
> break;
> if (--count == 0) {
> dev_err(&adev->pdev->dev, "Failed to reset ACP\n");
> - return -ETIMEDOUT;
> + r = -ETIMEDOUT;
> + goto failure;
> }
> udelay(100);
> }
> @@ -384,7 +386,8 @@ static int acp_hw_init(void *handle)
> break;
> if (--count == 0) {
> dev_err(&adev->pdev->dev, "Failed to reset ACP\n");
> - return -ETIMEDOUT;
> + r = -ETIMEDOUT;
> + goto failure;
> }
> udelay(100);
> }
> @@ -393,6 +396,13 @@ static int acp_hw_init(void *handle)
> val &= ~ACP_SOFT_RESET__SoftResetAud_MASK;
> cgs_write_register(adev->acp.cgs_device, mmACP_SOFT_RESET, val);
> return 0;
> +
> +failure:
> + kfree(i2s_pdata);
> + kfree(adev->acp.acp_res);
> + kfree(adev->acp.acp_cell);
> + kfree(adev->acp.acp_genpd);
> + return r;
> }
>
> /**

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