mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 18:26:43 +07:00
ce492b3b8f
Using flat regmap cache instead of RB-tree to avoid the following lockdep warning on driver load: WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:2755 lockdep_trace_alloc+0x15c/0x160() DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags)) The RB-tree regmap cache needs to allocate new space on first writes. However, allocations in an atomic context (e.g. when a spinlock is held) are not allowed. The function regmap_write calls map->lock, which acquires a spinlock in the fast_io case. Since the FSL DCU driver uses MMIO, the regmap bus of type regmap_mmio is being used which has fast_io set to true. Use flat regmap cache and specify max register to be large enouth to cover all registers available in LS1021a and Vybrids register space. Signed-off-by: Stefan Agner <stefan@agner.ch> Cc: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org |
||
|---|---|---|
| .. | ||
| fsl_dcu_drm_crtc.c | ||
| fsl_dcu_drm_crtc.h | ||
| fsl_dcu_drm_drv.c | ||
| fsl_dcu_drm_drv.h | ||
| fsl_dcu_drm_fbdev.c | ||
| fsl_dcu_drm_kms.c | ||
| fsl_dcu_drm_output.h | ||
| fsl_dcu_drm_plane.c | ||
| fsl_dcu_drm_plane.h | ||
| fsl_dcu_drm_rgb.c | ||
| fsl_tcon.c | ||
| fsl_tcon.h | ||
| Kconfig | ||
| Makefile | ||