The driver may sleep while holding a spinlock. The function call path (from bottom to top) in Linux 4.19 is: sound/soc/sti/uniperif_player.c, 229: mutex_lock in uni_player_set_channel_status sound/soc/sti/uniperif_player.c, 608: uni_player_set_channel_status in uni_player_ctl_iec958_put sound/soc/sti/uniperif_player.c, 603: _raw_spin_lock_irqsave in uni_player_ctl_iec958_put mutex_lock() can sleep at runtime. I am not sure how to properly fix this possible bug, so I only report it. This bug is found by a static analysis tool STCheck written by myself. Best wishes, Jia-Ju Bai _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
