From 3a49012224ca9016658a831a327ff6a7fe5bb4f9 Mon Sep 17 00:00:00 2001 From: Guido Martínez Date: Tue, 17 Jun 2014 11:17:07 -0300 Subject: drm/tilcdc: panel: fix leak when unloading the module MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The driver did not unregister the allocated framebuffer, which caused memory leaks (and memory manager WARNs) when unloading. Also, the framebuffer device under /dev still existed after unloading. Add a call to drm_fbdev_cma_fini when unloading the module to prevent both issues. Signed-off-by: Guido Martínez Tested-by: Darren Etheridge Cc: #v3.9+ Signed-off-by: Dave Airlie --- drivers/gpu/drm/tilcdc/tilcdc_drv.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/gpu/drm/tilcdc/tilcdc_drv.c') diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index b20b69488dc9..490aee79e106 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -122,6 +122,7 @@ static int tilcdc_unload(struct drm_device *dev) struct tilcdc_drm_private *priv = dev->dev_private; struct tilcdc_module *mod, *cur; + drm_fbdev_cma_fini(priv->fbdev); drm_kms_helper_poll_fini(dev); drm_mode_config_cleanup(dev); drm_vblank_cleanup(dev); -- cgit v1.2.3 From eb565a2bbadc6a5030a6dbe58db1aa52453e7edf Mon Sep 17 00:00:00 2001 From: Guido Martínez Date: Tue, 17 Jun 2014 11:17:08 -0300 Subject: drm/tilcdc: fix release order on exit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Unregister resources in the correct order on tilcdc_drm_fini, which is the reverse order they were registered during tilcdc_drm_init. This also means unregistering the driver before releasing its resources. Signed-off-by: Guido Martínez Tested-by: Darren Etheridge Cc: #v3.9+ Signed-off-by: Dave Airlie --- drivers/gpu/drm/tilcdc/tilcdc_drv.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/gpu/drm/tilcdc/tilcdc_drv.c') diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index 490aee79e106..006a30e90390 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -629,10 +629,10 @@ static int __init tilcdc_drm_init(void) static void __exit tilcdc_drm_fini(void) { DBG("fini"); - tilcdc_tfp410_fini(); - tilcdc_slave_fini(); - tilcdc_panel_fini(); platform_driver_unregister(&tilcdc_platform_driver); + tilcdc_panel_fini(); + tilcdc_slave_fini(); + tilcdc_tfp410_fini(); } late_initcall(tilcdc_drm_init); -- cgit v1.2.3 From 7cdcce9f8b4c15dc55f880307b844a49127db86e Mon Sep 17 00:00:00 2001 From: Guido Martínez Date: Tue, 17 Jun 2014 11:17:10 -0300 Subject: drm/tilcdc: remove submodule destroy calls MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The TI tilcdc driver is designed with a notion of submodules. Currently, at unload time, these submodules are iterated and destroyed. Now that the tilcdc remove order is fixed, this can be handled perfectly by the kernel using the device infrastructure, since each submodule is a kernel driver itself, and they are only destroy()'ed at unload time. Therefore we move the destroy() functionality to each submodule's remove(). Also, remove some checks in the unloading process since the new code guarantees the resources are allocated and need a release. Signed-off-by: Guido Martínez Tested-by: Darren Etheridge Signed-off-by: Dave Airlie --- drivers/gpu/drm/tilcdc/Module.symvers | 0 drivers/gpu/drm/tilcdc/tilcdc_drv.c | 6 ------ drivers/gpu/drm/tilcdc/tilcdc_drv.h | 1 - drivers/gpu/drm/tilcdc/tilcdc_panel.c | 36 +++++++++++++++++----------------- drivers/gpu/drm/tilcdc/tilcdc_slave.c | 26 +++++++++++++----------- drivers/gpu/drm/tilcdc/tilcdc_tfp410.c | 34 ++++++++++++++++---------------- 6 files changed, 50 insertions(+), 53 deletions(-) create mode 100644 drivers/gpu/drm/tilcdc/Module.symvers (limited to 'drivers/gpu/drm/tilcdc/tilcdc_drv.c') diff --git a/drivers/gpu/drm/tilcdc/Module.symvers b/drivers/gpu/drm/tilcdc/Module.symvers new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index 006a30e90390..2c860c41dfdb 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -120,7 +120,6 @@ static int cpufreq_transition(struct notifier_block *nb, static int tilcdc_unload(struct drm_device *dev) { struct tilcdc_drm_private *priv = dev->dev_private; - struct tilcdc_module *mod, *cur; drm_fbdev_cma_fini(priv->fbdev); drm_kms_helper_poll_fini(dev); @@ -149,11 +148,6 @@ static int tilcdc_unload(struct drm_device *dev) pm_runtime_disable(dev->dev); - list_for_each_entry_safe(mod, cur, &module_list, list) { - DBG("destroying module: %s", mod->name); - mod->funcs->destroy(mod); - } - kfree(priv); return 0; diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.h b/drivers/gpu/drm/tilcdc/tilcdc_drv.h index 093803683b25..7596c144a9fb 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.h +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.h @@ -98,7 +98,6 @@ struct tilcdc_module; struct tilcdc_module_ops { /* create appropriate encoders/connectors: */ int (*modeset_init)(struct tilcdc_module *mod, struct drm_device *dev); - void (*destroy)(struct tilcdc_module *mod); #ifdef CONFIG_DEBUG_FS /* create debugfs nodes (can be NULL): */ int (*debugfs_init)(struct tilcdc_module *mod, struct drm_minor *minor); diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.c b/drivers/gpu/drm/tilcdc/tilcdc_panel.c index b0b9396f41a6..8ff72c8ad06b 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_panel.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.c @@ -282,21 +282,8 @@ static int panel_modeset_init(struct tilcdc_module *mod, struct drm_device *dev) return 0; } -static void panel_destroy(struct tilcdc_module *mod) -{ - struct panel_module *panel_mod = to_panel_module(mod); - - if (panel_mod->timings) - display_timings_release(panel_mod->timings); - - tilcdc_module_cleanup(mod); - kfree(panel_mod->info); - kfree(panel_mod); -} - static const struct tilcdc_module_ops panel_module_ops = { .modeset_init = panel_modeset_init, - .destroy = panel_destroy, }; /* @@ -372,6 +359,7 @@ static int panel_probe(struct platform_device *pdev) return -ENOMEM; mod = &panel_mod->base; + pdev->dev.platform_data = mod; tilcdc_module_init(mod, "panel", &panel_module_ops); @@ -379,17 +367,16 @@ static int panel_probe(struct platform_device *pdev) if (IS_ERR(pinctrl)) dev_warn(&pdev->dev, "pins are not configured\n"); - panel_mod->timings = of_get_display_timings(node); if (!panel_mod->timings) { dev_err(&pdev->dev, "could not get panel timings\n"); - goto fail; + goto fail_free; } panel_mod->info = of_get_panel_info(node); if (!panel_mod->info) { dev_err(&pdev->dev, "could not get panel info\n"); - goto fail; + goto fail_timings; } mod->preferred_bpp = panel_mod->info->bpp; @@ -400,13 +387,26 @@ static int panel_probe(struct platform_device *pdev) return 0; -fail: - panel_destroy(mod); +fail_timings: + display_timings_release(panel_mod->timings); + +fail_free: + kfree(panel_mod); + tilcdc_module_cleanup(mod); return ret; } static int panel_remove(struct platform_device *pdev) { + struct tilcdc_module *mod = dev_get_platdata(&pdev->dev); + struct panel_module *panel_mod = to_panel_module(mod); + + display_timings_release(panel_mod->timings); + + tilcdc_module_cleanup(mod); + kfree(panel_mod->info); + kfree(panel_mod); + return 0; } diff --git a/drivers/gpu/drm/tilcdc/tilcdc_slave.c b/drivers/gpu/drm/tilcdc/tilcdc_slave.c index a5a22454acad..f02cb7c02f7f 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_slave.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_slave.c @@ -296,17 +296,8 @@ static int slave_modeset_init(struct tilcdc_module *mod, struct drm_device *dev) return 0; } -static void slave_destroy(struct tilcdc_module *mod) -{ - struct slave_module *slave_mod = to_slave_module(mod); - - tilcdc_module_cleanup(mod); - kfree(slave_mod); -} - static const struct tilcdc_module_ops slave_module_ops = { .modeset_init = slave_modeset_init, - .destroy = slave_destroy, }; /* @@ -356,10 +347,13 @@ static int slave_probe(struct platform_device *pdev) } slave_mod = kzalloc(sizeof(*slave_mod), GFP_KERNEL); - if (!slave_mod) - return -ENOMEM; + if (!slave_mod) { + ret = -ENOMEM; + goto fail_adapter; + } mod = &slave_mod->base; + pdev->dev.platform_data = mod; mod->preferred_bpp = slave_info.bpp; @@ -374,10 +368,20 @@ static int slave_probe(struct platform_device *pdev) tilcdc_slave_probedefer(false); return 0; + +fail_adapter: + i2c_put_adapter(slavei2c); + return ret; } static int slave_remove(struct platform_device *pdev) { + struct tilcdc_module *mod = dev_get_platdata(&pdev->dev); + struct slave_module *slave_mod = to_slave_module(mod); + + tilcdc_module_cleanup(mod); + kfree(slave_mod); + return 0; } diff --git a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c index 630360621bac..82fb5204565f 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c @@ -296,23 +296,8 @@ static int tfp410_modeset_init(struct tilcdc_module *mod, struct drm_device *dev return 0; } -static void tfp410_destroy(struct tilcdc_module *mod) -{ - struct tfp410_module *tfp410_mod = to_tfp410_module(mod); - - if (tfp410_mod->i2c) - i2c_put_adapter(tfp410_mod->i2c); - - if (!IS_ERR_VALUE(tfp410_mod->gpio)) - gpio_free(tfp410_mod->gpio); - - tilcdc_module_cleanup(mod); - kfree(tfp410_mod); -} - static const struct tilcdc_module_ops tfp410_module_ops = { .modeset_init = tfp410_modeset_init, - .destroy = tfp410_destroy, }; /* @@ -342,6 +327,7 @@ static int tfp410_probe(struct platform_device *pdev) return -ENOMEM; mod = &tfp410_mod->base; + pdev->dev.platform_data = mod; tilcdc_module_init(mod, "tfp410", &tfp410_module_ops); @@ -365,6 +351,7 @@ static int tfp410_probe(struct platform_device *pdev) tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node); if (!tfp410_mod->i2c) { dev_err(&pdev->dev, "could not get i2c\n"); + of_node_put(i2c_node); goto fail; } @@ -378,19 +365,32 @@ static int tfp410_probe(struct platform_device *pdev) ret = gpio_request(tfp410_mod->gpio, "DVI_PDn"); if (ret) { dev_err(&pdev->dev, "could not get DVI_PDn gpio\n"); - goto fail; + goto fail_adapter; } } return 0; +fail_adapter: + i2c_put_adapter(tfp410_mod->i2c); + fail: - tfp410_destroy(mod); + kfree(tfp410_mod); + tilcdc_module_cleanup(mod); return ret; } static int tfp410_remove(struct platform_device *pdev) { + struct tilcdc_module *mod = dev_get_platdata(&pdev->dev); + struct tfp410_module *tfp410_mod = to_tfp410_module(mod); + + i2c_put_adapter(tfp410_mod->i2c); + gpio_free(tfp410_mod->gpio); + + tilcdc_module_cleanup(mod); + kfree(tfp410_mod); + return 0; } -- cgit v1.2.3 From 2023d84d2c3b7a4b8fc5c64c08c59c4e1505e2d3 Mon Sep 17 00:00:00 2001 From: Guido Martínez Date: Tue, 17 Jun 2014 11:17:11 -0300 Subject: drm/tilcdc: replace late_initcall with module_init MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use module_init instead of late_initcall, as is the norm for modular drivers. module_init was used until 6e8de0bd6a51fdeebd5d975c4fcc426f730b339b ("drm/tilcdc: add encoder slave (v2)") changed it to a late_initcall, but it does not explain why. Tests show it's working properly with module_init. Signed-off-by: Guido Martínez Tested-by: Darren Etheridge Signed-off-by: Dave Airlie --- drivers/gpu/drm/tilcdc/tilcdc_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/tilcdc/tilcdc_drv.c') diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index 2c860c41dfdb..6be623b4a86f 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -629,7 +629,7 @@ static void __exit tilcdc_drm_fini(void) tilcdc_tfp410_fini(); } -late_initcall(tilcdc_drm_init); +module_init(tilcdc_drm_init); module_exit(tilcdc_drm_fini); MODULE_AUTHOR("Rob Clark