From: Alex Deucher alexander.deucher@amd.com
[ Upstream commit 9eee152aab56d374edb9ad21b3db05f5cdda2fe6 ]
The call to pm_runtime_get_sync increments the counter even in case of failure, leading to incorrect ref count. In case of failure, decrement the ref count before returning.
Acked-by: Evan Quan evan.quan@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 95 +++++++++++++++------ 1 file changed, 70 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index a414da22a359c..386b979e08522 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -223,12 +223,16 @@ static int amdgpu_debugfs_process_reg_op(bool read, struct file *f, *pos &= (1UL << 22) - 1;
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_virt_enable_access_debugfs(adev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
if (use_bank) { if ((sh_bank != 0xFFFFFFFF && sh_bank >= adev->gfx.config.max_sh_per_se) || @@ -332,12 +336,16 @@ static ssize_t amdgpu_debugfs_regs_pcie_read(struct file *f, char __user *buf, return -EINVAL;
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_virt_enable_access_debugfs(adev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
while (size) { uint32_t value; @@ -387,12 +395,16 @@ static ssize_t amdgpu_debugfs_regs_pcie_write(struct file *f, const char __user return -EINVAL;
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_virt_enable_access_debugfs(adev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
while (size) { uint32_t value; @@ -443,12 +455,16 @@ static ssize_t amdgpu_debugfs_regs_didt_read(struct file *f, char __user *buf, return -EINVAL;
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_virt_enable_access_debugfs(adev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
while (size) { uint32_t value; @@ -498,12 +514,16 @@ static ssize_t amdgpu_debugfs_regs_didt_write(struct file *f, const char __user return -EINVAL;
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_virt_enable_access_debugfs(adev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
while (size) { uint32_t value; @@ -554,12 +574,16 @@ static ssize_t amdgpu_debugfs_regs_smc_read(struct file *f, char __user *buf, return -EINVAL;
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_virt_enable_access_debugfs(adev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
while (size) { uint32_t value; @@ -609,12 +633,16 @@ static ssize_t amdgpu_debugfs_regs_smc_write(struct file *f, const char __user * return -EINVAL;
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_virt_enable_access_debugfs(adev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
while (size) { uint32_t value; @@ -764,12 +792,16 @@ static ssize_t amdgpu_debugfs_sensor_read(struct file *f, char __user *buf, valuesize = sizeof(values);
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_virt_enable_access_debugfs(adev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_dpm_read_sensor(adev, idx, &values[0], &valuesize);
@@ -842,12 +874,16 @@ static ssize_t amdgpu_debugfs_wave_read(struct file *f, char __user *buf, simd = (*pos & GENMASK_ULL(44, 37)) >> 37;
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
r = amdgpu_virt_enable_access_debugfs(adev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
/* switch to the specific se/sh/cu */ mutex_lock(&adev->grbm_idx_mutex); @@ -977,6 +1013,7 @@ static ssize_t amdgpu_debugfs_gpr_read(struct file *f, char __user *buf, }
err: + pm_runtime_put_autosuspend(adev->ddev->dev); kfree(data); amdgpu_virt_disable_access_debugfs(adev); return result; @@ -1003,8 +1040,10 @@ static ssize_t amdgpu_debugfs_gfxoff_write(struct file *f, const char __user *bu return -EINVAL;
r = pm_runtime_get_sync(adev->ddev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
while (size) { uint32_t value; @@ -1140,8 +1179,10 @@ static int amdgpu_debugfs_test_ib(struct seq_file *m, void *data) int r = 0, i;
r = pm_runtime_get_sync(dev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
/* Avoid accidently unparking the sched thread during GPU reset */ mutex_lock(&adev->lock_reset); @@ -1197,8 +1238,10 @@ static int amdgpu_debugfs_evict_vram(struct seq_file *m, void *data) int r;
r = pm_runtime_get_sync(dev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
seq_printf(m, "(%d)\n", amdgpu_bo_evict_vram(adev));
@@ -1216,8 +1259,10 @@ static int amdgpu_debugfs_evict_gtt(struct seq_file *m, void *data) int r;
r = pm_runtime_get_sync(dev->dev); - if (r < 0) + if (r < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return r; + }
seq_printf(m, "(%d)\n", ttm_bo_evict_mm(&adev->mman.bdev, TTM_PL_TT));
@@ -1417,16 +1462,16 @@ static int amdgpu_debugfs_sclk_set(void *data, u64 val) return -EINVAL;
ret = pm_runtime_get_sync(adev->ddev->dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put_autosuspend(adev->ddev->dev); return ret; + }
if (is_support_sw_smu(adev)) { ret = smu_get_dpm_freq_range(&adev->smu, SMU_SCLK, &min_freq, &max_freq, true); if (ret || val > max_freq || val < min_freq) return -EINVAL; ret = smu_set_soft_freq_range(&adev->smu, SMU_SCLK, (uint32_t)val, (uint32_t)val, true); - } else { - return 0; }
pm_runtime_mark_last_busy(adev->ddev->dev);