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drm/i915/selftests: Allocate inode/file dynamically

Browse source 
Avoid having too large a stack by creating the fake struct inode/file on
the heap instead.

drivers/gpu/drm/i915/selftests/mock_drm.c: In function 'mock_file':
drivers/gpu/drm/i915/selftests/mock_drm.c:46:1: error: the frame size of 1328 bytes is larger than 1280 bytes [-Werror=frame-larger-than=]
drivers/gpu/drm/i915/selftests/mock_drm.c: In function 'mock_file_free':
drivers/gpu/drm/i915/selftests/mock_drm.c:54:1: error: the frame size of 1312 bytes is larger than 1280 bytes [-Werror=frame-larger-than=]

Reported-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 66d9cb5d80 ("drm/i915: Mock the GEM device for self-testing")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: http://patchwork.freedesktop.org/patch/msgid/20170419094143.16922-2-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit 2310b3c952)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Chris Wilson 2017-04-19 10:41:17 +01:00 committed by Jani Nikula
parent acf2dc2266
commit b162d47e14
1 changed files with 32 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

45
drivers/gpu/drm/i915/selftests/mock_drm.c
View file

@ -24,31 +24,50 @@
#include "mock_drm.h"
static inline struct inode fake_inode(struct drm_i915_private *i915)
{
return (struct inode){ .i_rdev = i915->drm.primary->index };
}
struct drm_file *mock_file(struct drm_i915_private *i915)
{
struct inode inode = fake_inode(i915);
struct file filp = {};
struct file *filp;
struct inode *inode;
struct drm_file *file;
int err;
err = drm_open(&inode, &filp);
if (unlikely(err))
return ERR_PTR(err);
inode = kzalloc(sizeof(*inode), GFP_KERNEL);
if (!inode) {
err = -ENOMEM;
goto err;
}
file = filp.private_data;
inode->i_rdev = i915->drm.primary->index;
filp = kzalloc(sizeof(*filp), GFP_KERNEL);
if (!filp) {
err = -ENOMEM;
goto err_inode;
}
err = drm_open(inode, filp);
if (err)
goto err_filp;
file = filp->private_data;
memset(&file->filp, POISON_INUSE, sizeof(file->filp));
file->authenticated = true;
kfree(filp);
kfree(inode);
return file;
err_filp:
kfree(filp);
err_inode:
kfree(inode);
err:
return ERR_PTR(err);
}
void mock_file_free(struct drm_i915_private *i915, struct drm_file *file)
{
struct inode inode = fake_inode(i915);
struct file filp = { .private_data = file };
drm_release(&inode, &filp);
drm_release(NULL, &filp);
}