From e4fcc72c1a420bdbe425530dd19724214ceb44ec Mon Sep 17 00:00:00 2001 From: James Smart Date: Mon, 6 Apr 2020 16:55:34 -0700 Subject: [PATCH] nvmet-fc: slight cleanup for kbuild test warnings The kbuild tst robot flagged the following 3 issues: Case 1) >> drivers/nvme/target/fc.c:1201:37: warning: Either the condition >> '!assoc' is redundant or there is possible null pointer dereference: >> assoc. [nullPointerRedundantCheck] >> struct nvmet_fc_tgtport *tgtport = assoc->tgtport; ^ >> drivers/nvme/target/fc.c:1853:7: note: Assuming that condition '!assoc' >> is not redundant >> if (!assoc) ^ >> drivers/nvme/target/fc.c:1850:37: note: Assignment >> 'assoc=nvmet_fc_find_target_assoc(tgtport,be64_to_cpu( >> rqst->associd.association_id))', assigned value is 0 >> assoc = nvmet_fc_find_target_assoc(tgtport, ^ >> drivers/nvme/target/fc.c:1896:31: note: Calling function >> 'nvmet_fc_delete_target_assoc', 1st argument 'assoc' value is 0 >> nvmet_fc_delete_target_assoc(assoc); ^ The tool isn't smart enough to see that line 1854 sets a ret value which thereafter causes the routine to exit. This occurs before any of the assoc references, so it is not an issue. There are 2 more reportings of this same failure. To quiet the tool - rework the if test that does the exit to also reference assoc. No change in logic otherwise. Case 2) drivers/nvme/target/fc.c:1202:29: warning: The scope of the variable 'queue' can be reduced. [variableScope] struct nvmet_fc_tgt_queue *queue; ^ The tool is requesting the variable be declared within the code block that utilizes it. Ignoring this report as existing code style is fine. Case 3) drivers/nvme/target/fc.c:1137:16: warning: Variable 'needrandom' is assigned a value that is never used. [unreadVariable] needrandom = true; ^ Another parsing issue with the tool. Given that parens were not used with the list_for_each_entry() check, it inadvertantly thinks the break exited the outer while loop not the inner for loop. This is not an error. But, added parens to the inner list_for_each_entry() to quiet the tool and as it is better coding style. -- james Signed-off-by: James Smart Reported-by: kbuild test robot CC: kbuild test robot CC: Christoph Hellwig Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- drivers/nvme/target/fc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c index 02d9751..27fd3b5 100644 --- a/drivers/nvme/target/fc.c +++ b/drivers/nvme/target/fc.c @@ -1132,11 +1132,12 @@ nvmet_fc_alloc_target_assoc(struct nvmet_fc_tgtport *tgtport, void *hosthandle) spin_lock_irqsave(&tgtport->lock, flags); needrandom = false; - list_for_each_entry(tmpassoc, &tgtport->assoc_list, a_list) + list_for_each_entry(tmpassoc, &tgtport->assoc_list, a_list) { if (ran == tmpassoc->association_id) { needrandom = true; break; } + } if (!needrandom) { assoc->association_id = ran; list_add_tail(&assoc->a_list, &tgtport->assoc_list); @@ -1837,7 +1838,7 @@ nvmet_fc_ls_disconnect(struct nvmet_fc_tgtport *tgtport, &iod->rqstbuf->rq_dis_assoc; struct fcnvme_ls_disconnect_assoc_acc *acc = &iod->rspbuf->rsp_dis_assoc; - struct nvmet_fc_tgt_assoc *assoc; + struct nvmet_fc_tgt_assoc *assoc = NULL; struct nvmet_fc_ls_iod *oldls = NULL; unsigned long flags; int ret = 0; @@ -1854,7 +1855,7 @@ nvmet_fc_ls_disconnect(struct nvmet_fc_tgtport *tgtport, ret = VERR_NO_ASSOC; } - if (ret) { + if (ret || !assoc) { dev_err(tgtport->dev, "Disconnect LS failed: %s\n", validation_errors[ret]); -- 2.7.4