> gcc warns that the latest workqueue change leads to returning an
> uninitialized variable:
>
> drivers/staging/lustre/lnet/selftest/module.c: In function
> 'lnet_selftest_init':
> drivers/staging/lustre/lnet/selftest/module.c:98:10: error: 'rc' may be used
> uninitialized in this function [-Werror=maybe-uninitialized]
>
> A failure from alloc_ordered_workqueue() tends to indicate an
> out-of-memory condition, so return -ENOMEM in both cases.
> The second error path was a preexisting bug, where we always
> returned zero after a kvmalloc_array() failure.
Reviewed-by: James Simmons <jsimm...@infradead.org>
> Fixes: 6106c0f82481 ("staging: lustre: lnet: convert selftest to use
> workqueues")
> Signed-off-by: Arnd Bergmann <a...@arndb.de>
> ---
> drivers/staging/lustre/lnet/selftest/module.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/lustre/lnet/selftest/module.c
> b/drivers/staging/lustre/lnet/selftest/module.c
> index aa6bfd5baf2f..c8d999e64f28 100644
> --- a/drivers/staging/lustre/lnet/selftest/module.c
> +++ b/drivers/staging/lustre/lnet/selftest/module.c
> @@ -95,15 +95,17 @@ lnet_selftest_init(void)
> lst_serial_wq = alloc_ordered_workqueue("lst_s", 0);
> if (!lst_serial_wq) {
> CERROR("Failed to create serial WI scheduler for LST\n");
> - return rc;
> + return -ENOMEM;
> }
> lst_init_step = LST_INIT_WI_SERIAL;
>
> nscheds = cfs_cpt_number(lnet_cpt_table());
> lst_test_wq = kvmalloc_array(nscheds, sizeof(lst_test_wq[0]),
> GFP_KERNEL | __GFP_ZERO);
> - if (!lst_test_wq)
> + if (!lst_test_wq) {
> + rc = -ENOMEM;
> goto error;
> + }
>
> lst_init_step = LST_INIT_WI_TEST;
> for (i = 0; i < nscheds; i++) {
> @@ -116,6 +118,7 @@ lnet_selftest_init(void)
> if (!lst_test_wq[i]) {
> CWARN("Failed to create CPU partition affinity WI
> scheduler %d for LST\n",
> i);
> + rc = -ENOMEM;
> goto error;
> }
> attrs.nice = 0;
> --
> 2.9.0
>
>
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