From: Bryan O'Donoghue bryan.odonoghue@linaro.org
[ Upstream commit 08b1cf474b7f72750adebe0f0a35f8e9a3eb75f6 ]
Commit aaaa93eda64b ("media] media: venus: venc: add video encoder files") is the last in a series of three commits to add core.c vdec.c and venc.c adding core, encoder and decoder.
The encoder and decoder check for core drvdata as set and return -EPROBE_DEFER if it has not been set, however both the encoder and decoder rely on core.v4l2_dev as valid.
core.v4l2_dev will not be valid until v4l2_device_register() has completed in core.c's probe().
Normally this is never seen however, Dmitry reported the following backtrace when compiling drivers and firmware directly into a kernel image.
[ 5.259968] Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT) [ 5.269850] sd 0:0:0:3: [sdd] Optimal transfer size 524288 bytes [ 5.275505] Workqueue: events deferred_probe_work_func [ 5.275513] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--) [ 5.441211] usb 2-1: new SuperSpeedPlus Gen 2 USB device number 2 using xhci-hcd [ 5.442486] pc : refcount_warn_saturate+0x140/0x148 [ 5.493756] hub 2-1:1.0: USB hub found [ 5.496266] lr : refcount_warn_saturate+0x140/0x148 [ 5.500982] hub 2-1:1.0: 4 ports detected [ 5.503440] sp : ffff80001067b730 [ 5.503442] x29: ffff80001067b730 [ 5.592660] usb 1-1: new high-speed USB device number 2 using xhci-hcd [ 5.598478] x28: ffff6c6bc1c379b8 [ 5.598480] x27: ffffa5c673852960 x26: ffffa5c673852000 [ 5.598484] x25: ffff6c6bc1c37800 x24: 0000000000000001 [ 5.810652] x23: 0000000000000000 x22: ffffa5c673bc7118 [ 5.813777] hub 1-1:1.0: USB hub found [ 5.816108] x21: ffffa5c674440000 x20: 0000000000000001 [ 5.820846] hub 1-1:1.0: 4 ports detected [ 5.825415] x19: ffffa5c6744f4000 x18: ffffffffffffffff [ 5.825418] x17: 0000000000000000 x16: 0000000000000000 [ 5.825421] x15: 00000a4810c193ba x14: 0000000000000000 [ 5.825424] x13: 00000000000002b8 x12: 000000000000f20a [ 5.825427] x11: 000000000000f20a x10: 0000000000000038 [ 5.845447] usb 2-1.1: new SuperSpeed Gen 1 USB device number 3 using xhci-hcd [ 5.845904] [ 5.845905] x9 : 0000000000000000 x8 : ffff6c6d36fae780 [ 5.871208] x7 : ffff6c6d36faf240 x6 : 0000000000000000 [ 5.876664] x5 : 0000000000000004 x4 : 0000000000000085 [ 5.882121] x3 : 0000000000000119 x2 : ffffa5c6741ef478 [ 5.887578] x1 : 3acbb3926faf5f00 x0 : 0000000000000000 [ 5.893036] Call trace: [ 5.895551] refcount_warn_saturate+0x140/0x148 [ 5.900202] __video_register_device+0x64c/0xd10 [ 5.904944] venc_probe+0xc4/0x148 [ 5.908444] platform_probe+0x68/0xe0 [ 5.912210] really_probe+0x118/0x3e0 [ 5.915977] driver_probe_device+0x5c/0xc0 [ 5.920187] __device_attach_driver+0x98/0xb8 [ 5.924661] bus_for_each_drv+0x68/0xd0 [ 5.928604] __device_attach+0xec/0x148 [ 5.932547] device_initial_probe+0x14/0x20 [ 5.936845] bus_probe_device+0x9c/0xa8 [ 5.940788] device_add+0x3e8/0x7c8 [ 5.944376] of_device_add+0x4c/0x60 [ 5.948056] of_platform_device_create_pdata+0xbc/0x140 [ 5.953425] of_platform_bus_create+0x17c/0x3c0 [ 5.958078] of_platform_populate+0x80/0x110 [ 5.962463] venus_probe+0x2ec/0x4d8 [ 5.966143] platform_probe+0x68/0xe0 [ 5.969907] really_probe+0x118/0x3e0 [ 5.973674] driver_probe_device+0x5c/0xc0 [ 5.977882] __device_attach_driver+0x98/0xb8 [ 5.982356] bus_for_each_drv+0x68/0xd0 [ 5.986298] __device_attach+0xec/0x148 [ 5.990242] device_initial_probe+0x14/0x20 [ 5.994539] bus_probe_device+0x9c/0xa8 [ 5.998481] deferred_probe_work_func+0x74/0xb0 [ 6.003132] process_one_work+0x1e8/0x360 [ 6.007254] worker_thread+0x208/0x478 [ 6.011106] kthread+0x150/0x158 [ 6.014431] ret_from_fork+0x10/0x30 [ 6.018111] ---[ end trace f074246b1ecdb466 ]---
This patch fixes by
- Only setting drvdata after v4l2_device_register() completes - Moving v4l2_device_register() so that suspend/reume in core::probe() stays as-is - Changes pm_ops->core_function() to take struct venus_core not struct device - Minimal rework of v4l2_device_*register in probe/remove
Reported-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Signed-off-by: Bryan O'Donoghue bryan.odonoghue@linaro.org Signed-off-by: Stanimir Varbanov stanimir.varbanov@linaro.org Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/qcom/venus/core.c | 30 +++++++++++-------- .../media/platform/qcom/venus/pm_helpers.c | 30 ++++++++----------- .../media/platform/qcom/venus/pm_helpers.h | 7 +++-- 3 files changed, 34 insertions(+), 33 deletions(-)
diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c index f9896c121fd8..d2842f496b47 100644 --- a/drivers/media/platform/qcom/venus/core.c +++ b/drivers/media/platform/qcom/venus/core.c @@ -218,7 +218,6 @@ static int venus_probe(struct platform_device *pdev) return -ENOMEM;
core->dev = dev; - platform_set_drvdata(pdev, core);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0); core->base = devm_ioremap_resource(dev, r); @@ -248,7 +247,7 @@ static int venus_probe(struct platform_device *pdev) return -ENODEV;
if (core->pm_ops->core_get) { - ret = core->pm_ops->core_get(dev); + ret = core->pm_ops->core_get(core); if (ret) return ret; } @@ -273,6 +272,12 @@ static int venus_probe(struct platform_device *pdev) if (ret) goto err_core_put;
+ ret = v4l2_device_register(dev, &core->v4l2_dev); + if (ret) + goto err_core_deinit; + + platform_set_drvdata(pdev, core); + pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev); @@ -307,10 +312,6 @@ static int venus_probe(struct platform_device *pdev) if (ret) goto err_venus_shutdown;
- ret = v4l2_device_register(dev, &core->v4l2_dev); - if (ret) - goto err_core_deinit; - ret = pm_runtime_put_sync(dev); if (ret) { pm_runtime_get_noresume(dev); @@ -323,8 +324,6 @@ static int venus_probe(struct platform_device *pdev)
err_dev_unregister: v4l2_device_unregister(&core->v4l2_dev); -err_core_deinit: - hfi_core_deinit(core, false); err_venus_shutdown: venus_shutdown(core); err_runtime_disable: @@ -332,9 +331,11 @@ err_runtime_disable: pm_runtime_set_suspended(dev); pm_runtime_disable(dev); hfi_destroy(core); +err_core_deinit: + hfi_core_deinit(core, false); err_core_put: if (core->pm_ops->core_put) - core->pm_ops->core_put(dev); + core->pm_ops->core_put(core); return ret; }
@@ -360,7 +361,9 @@ static int venus_remove(struct platform_device *pdev) pm_runtime_disable(dev);
if (pm_ops->core_put) - pm_ops->core_put(dev); + pm_ops->core_put(core); + + v4l2_device_unregister(&core->v4l2_dev);
hfi_destroy(core);
@@ -368,6 +371,7 @@ static int venus_remove(struct platform_device *pdev) icc_put(core->cpucfg_path);
v4l2_device_unregister(&core->v4l2_dev); + mutex_destroy(&core->pm_lock); mutex_destroy(&core->lock); venus_dbgfs_deinit(core); @@ -396,7 +400,7 @@ static __maybe_unused int venus_runtime_suspend(struct device *dev) return ret;
if (pm_ops->core_power) { - ret = pm_ops->core_power(dev, POWER_OFF); + ret = pm_ops->core_power(core, POWER_OFF); if (ret) return ret; } @@ -414,7 +418,7 @@ static __maybe_unused int venus_runtime_suspend(struct device *dev) err_video_path: icc_set_bw(core->cpucfg_path, kbps_to_icc(1000), 0); err_cpucfg_path: - pm_ops->core_power(dev, POWER_ON); + pm_ops->core_power(core, POWER_ON);
return ret; } @@ -434,7 +438,7 @@ static __maybe_unused int venus_runtime_resume(struct device *dev) return ret;
if (pm_ops->core_power) { - ret = pm_ops->core_power(dev, POWER_ON); + ret = pm_ops->core_power(core, POWER_ON); if (ret) return ret; } diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c index 43c4e3d9e281..e349d01422c5 100644 --- a/drivers/media/platform/qcom/venus/pm_helpers.c +++ b/drivers/media/platform/qcom/venus/pm_helpers.c @@ -277,16 +277,13 @@ set_freq: return 0; }
-static int core_get_v1(struct device *dev) +static int core_get_v1(struct venus_core *core) { - struct venus_core *core = dev_get_drvdata(dev); - return core_clks_get(core); }
-static int core_power_v1(struct device *dev, int on) +static int core_power_v1(struct venus_core *core, int on) { - struct venus_core *core = dev_get_drvdata(dev); int ret = 0;
if (on == POWER_ON) @@ -753,12 +750,12 @@ static int venc_power_v4(struct device *dev, int on) return ret; }
-static int vcodec_domains_get(struct device *dev) +static int vcodec_domains_get(struct venus_core *core) { int ret; struct opp_table *opp_table; struct device **opp_virt_dev; - struct venus_core *core = dev_get_drvdata(dev); + struct device *dev = core->dev; const struct venus_resources *res = core->res; struct device *pd; unsigned int i; @@ -809,9 +806,8 @@ opp_attach_err: return ret; }
-static void vcodec_domains_put(struct device *dev) +static void vcodec_domains_put(struct venus_core *core) { - struct venus_core *core = dev_get_drvdata(dev); const struct venus_resources *res = core->res; unsigned int i;
@@ -834,9 +830,9 @@ skip_pmdomains: dev_pm_opp_detach_genpd(core->opp_table); }
-static int core_get_v4(struct device *dev) +static int core_get_v4(struct venus_core *core) { - struct venus_core *core = dev_get_drvdata(dev); + struct device *dev = core->dev; const struct venus_resources *res = core->res; int ret;
@@ -875,7 +871,7 @@ static int core_get_v4(struct device *dev) } }
- ret = vcodec_domains_get(dev); + ret = vcodec_domains_get(core); if (ret) { if (core->has_opp_table) dev_pm_opp_of_remove_table(dev); @@ -886,14 +882,14 @@ static int core_get_v4(struct device *dev) return 0; }
-static void core_put_v4(struct device *dev) +static void core_put_v4(struct venus_core *core) { - struct venus_core *core = dev_get_drvdata(dev); + struct device *dev = core->dev;
if (legacy_binding) return;
- vcodec_domains_put(dev); + vcodec_domains_put(core);
if (core->has_opp_table) dev_pm_opp_of_remove_table(dev); @@ -901,9 +897,9 @@ static void core_put_v4(struct device *dev)
}
-static int core_power_v4(struct device *dev, int on) +static int core_power_v4(struct venus_core *core, int on) { - struct venus_core *core = dev_get_drvdata(dev); + struct device *dev = core->dev; struct device *pmctrl = core->pmdomains[0]; int ret = 0;
diff --git a/drivers/media/platform/qcom/venus/pm_helpers.h b/drivers/media/platform/qcom/venus/pm_helpers.h index aa2f6afa2354..a492c50c5543 100644 --- a/drivers/media/platform/qcom/venus/pm_helpers.h +++ b/drivers/media/platform/qcom/venus/pm_helpers.h @@ -4,14 +4,15 @@ #define __VENUS_PM_HELPERS_H__
struct device; +struct venus_core;
#define POWER_ON 1 #define POWER_OFF 0
struct venus_pm_ops { - int (*core_get)(struct device *dev); - void (*core_put)(struct device *dev); - int (*core_power)(struct device *dev, int on); + int (*core_get)(struct venus_core *core); + void (*core_put)(struct venus_core *core); + int (*core_power)(struct venus_core *core, int on);
int (*vdec_get)(struct device *dev); void (*vdec_put)(struct device *dev);