diff options
| -rw-r--r-- | mm/damon/dbgfs.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/mm/damon/dbgfs.c b/mm/damon/dbgfs.c index 719278a8cc5e..8bf9e38b60f4 100644 --- a/mm/damon/dbgfs.c +++ b/mm/damon/dbgfs.c @@ -474,12 +474,18 @@ static ssize_t dbgfs_target_ids_write(struct file *file, /* remove previously set targets */ dbgfs_set_targets(ctx, 0, NULL); + if (!nr_targets) { + ret = count; + goto unlock_out; + } /* Configure the context for the address space type */ if (id_is_pid) - damon_va_set_operations(ctx); + ret = damon_select_ops(ctx, DAMON_OPS_VADDR); else - damon_pa_set_operations(ctx); + ret = damon_select_ops(ctx, DAMON_OPS_PADDR); + if (ret) + goto unlock_out; ret = dbgfs_set_targets(ctx, nr_targets, target_pids); if (!ret) @@ -735,7 +741,11 @@ static struct damon_ctx *dbgfs_new_ctx(void) if (!ctx) return NULL; - damon_va_set_operations(ctx); + if (damon_select_ops(ctx, DAMON_OPS_VADDR) && damon_select_ops(ctx, + DAMON_OPS_PADDR)) { + damon_destroy_ctx(ctx); + return NULL; + } ctx->callback.before_terminate = dbgfs_before_terminate; return ctx; } |