diff options
| -rw-r--r-- | drivers/power/sequencing/core.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/power/sequencing/core.c b/drivers/power/sequencing/core.c index 4dff71be11b6..9b512a055b5a 100644 --- a/drivers/power/sequencing/core.c +++ b/drivers/power/sequencing/core.c @@ -989,8 +989,9 @@ static void *pwrseq_debugfs_seq_start(struct seq_file *seq, loff_t *pos) ctx.index = *pos; /* - * We're holding the lock for the entire printout so no need to fiddle - * with device reference count. + * Hold the lock for the entire printout to prevent device removal. + * Reference counts are managed by start()/next()/stop() as required + * by the seq_file contract. */ down_read(&pwrseq_sem); @@ -998,7 +999,7 @@ static void *pwrseq_debugfs_seq_start(struct seq_file *seq, loff_t *pos) if (!ctx.index) return NULL; - return ctx.dev; + return get_device(ctx.dev); } static void *pwrseq_debugfs_seq_next(struct seq_file *seq, void *data, @@ -1008,8 +1009,9 @@ static void *pwrseq_debugfs_seq_next(struct seq_file *seq, void *data, ++*pos; - struct device *next __free(put_device) = - bus_find_next_device(&pwrseq_bus, curr); + struct device *next = bus_find_next_device(&pwrseq_bus, curr); + + put_device(curr); return next; } @@ -1058,6 +1060,8 @@ static int pwrseq_debugfs_seq_show(struct seq_file *seq, void *data) static void pwrseq_debugfs_seq_stop(struct seq_file *seq, void *data) { + if (data) + put_device(data); up_read(&pwrseq_sem); } |