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komeda_dev_resume() calls clk_prepare_enable() without checking the return value. If the clock fails to enable, the function returns 0 (success) while IRQs are enabled and IOMMU is connected on potentially unclocked hardware, causing undefined behavior on resume. Propagate the error from clk_prepare_enable() and fix all call sites in komeda_drv.c that previously ignored the return value of komeda_dev_resume(): - komeda_platform_probe(): if resume fails, jump to err_destroy_mdev (skipping the suspend call, since the clock was never enabled) - komeda_pm_resume(): propagate the error and skip drm_mode_config_helper_resume() on failure This issue was found by code review without access to Komeda hardware. Signed-off-by: Gustavo Kenji Mendonça Kaneko <kaneko.dev@pm.me> Reviewed-by: Liviu Dudau <liviu.dudau@arm.com> Link: https://patch.msgid.link/20260609130828.1066038-1-kaneko.dev@pm.me Signed-off-by: Liviu Dudau <liviu.dudau@arm.com> |
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| .. | ||
| display | ||
| hdlcd_crtc.c | ||
| hdlcd_drv.c | ||
| hdlcd_drv.h | ||
| hdlcd_regs.h | ||
| Kconfig | ||
| Makefile | ||
| malidp_crtc.c | ||
| malidp_drv.c | ||
| malidp_drv.h | ||
| malidp_hw.c | ||
| malidp_hw.h | ||
| malidp_mw.c | ||
| malidp_mw.h | ||
| malidp_planes.c | ||
| malidp_regs.h | ||