diff options
Diffstat (limited to 'fs/aio.c')
| -rw-r--r-- | fs/aio.c | 16 |
1 files changed, 9 insertions, 7 deletions
@@ -727,7 +727,7 @@ err: * when the processes owning a context have all exited to encourage * the rapid destruction of the kioctx. */ -static void kill_ioctx(struct mm_struct *mm, struct kioctx *ctx, +static int kill_ioctx(struct mm_struct *mm, struct kioctx *ctx, struct completion *requests_done) { if (!atomic_xchg(&ctx->dead, 1)) { @@ -759,10 +759,10 @@ static void kill_ioctx(struct mm_struct *mm, struct kioctx *ctx, ctx->requests_done = requests_done; percpu_ref_kill(&ctx->users); - } else { - if (requests_done) - complete(requests_done); + return 0; } + + return -EINVAL; } /* wait_on_sync_kiocb: @@ -1219,21 +1219,23 @@ SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx) if (likely(NULL != ioctx)) { struct completion requests_done = COMPLETION_INITIALIZER_ONSTACK(requests_done); + int ret; /* Pass requests_done to kill_ioctx() where it can be set * in a thread-safe way. If we try to set it here then we have * a race condition if two io_destroy() called simultaneously. */ - kill_ioctx(current->mm, ioctx, &requests_done); + ret = kill_ioctx(current->mm, ioctx, &requests_done); percpu_ref_put(&ioctx->users); /* Wait until all IO for the context are done. Otherwise kernel * keep using user-space buffers even if user thinks the context * is destroyed. */ - wait_for_completion(&requests_done); + if (!ret) + wait_for_completion(&requests_done); - return 0; + return ret; } pr_debug("EINVAL: io_destroy: invalid context id\n"); return -EINVAL; |
