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drm/amdgpu: fix multiple memory leaks in acp_hw_init 

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.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Navid Emamdoost 2019-10-01 22:46:07 -05:00 committed by Alex Deucher
parent 815fb4c9d7
commit 57be09c6e8
1 changed files with 22 additions and 12 deletions
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34
drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
View File

@ -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;
}
/**