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drm/mgag200: Fix error handling paths in fbdev driver 

Set up error handling in mgag200_fbdev_init and mgag200fb_create such that
they release the things they allocate, rather than relying on someone
calling mga_fbdev_destroy.

Based on a patch by Sudip Mukherjee <sudipm.mukherjee@gmail.com>

Link: http://lkml.kernel.org/r/55F6E68D.8070800@codeaurora.org
Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Archit Taneja 2015-09-17 16:30:54 +05:30 committed by Dave Airlie
parent 69e5d3f893
commit aec9e12953
1 changed files with 23 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/gpu/drm/mgag200/mgag200_fb.c
View File

@ -186,17 +186,19 @@ static int mgag200fb_create(struct drm_fb_helper *helper,
sysram = vmalloc(size);
if (!sysram)
return -ENOMEM;
goto err_sysram;
info = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(info))
return PTR_ERR(info);
if (IS_ERR(info)) {
ret = PTR_ERR(info);
goto err_alloc_fbi;
}
info->par = mfbdev;
ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
if (ret)
return ret;
goto err_framebuffer_init;
mfbdev->sysram = sysram;
mfbdev->size = size;
@ -225,7 +227,17 @@ static int mgag200fb_create(struct drm_fb_helper *helper,
DRM_DEBUG_KMS("allocated %dx%d\n",
fb->width, fb->height);
return 0;
err_framebuffer_init:
drm_fb_helper_release_fbi(helper);
err_alloc_fbi:
vfree(sysram);
err_sysram:
drm_gem_object_unreference_unlocked(gobj);
return ret;
}
static int mga_fbdev_destroy(struct drm_device *dev,
@ -276,23 +288,26 @@ int mgag200_fbdev_init(struct mga_device *mdev)
ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
mdev->num_crtc, MGAG200FB_CONN_LIMIT);
if (ret)
return ret;
goto err_fb_helper;
ret = drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
if (ret)
goto fini;
goto err_fb_setup;
/* disable all the possible outputs/crtcs before entering KMS mode */
drm_helper_disable_unused_functions(mdev->dev);
ret = drm_fb_helper_initial_config(&mfbdev->helper, bpp_sel);
if (ret)
goto fini;
goto err_fb_setup;
return 0;
fini:
err_fb_setup:
drm_fb_helper_fini(&mfbdev->helper);
err_fb_helper:
mdev->mfbdev = NULL;
return ret;
}