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| author | James Smart <jsmart2021@gmail.com> | 2020-04-07 02:55:34 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-05-10 01:18:35 +0300 |
| commit | e4fcc72c1a420bdbe425530dd19724214ceb44ec (patch) | |
| tree | 09bdee5c6a020f9e9c00b052c33adb6755e37e75 /drivers | |
| parent | b0012dd397155438c61b0c1b52ceec1f1366b3cc (diff) | |
| download | linux-e4fcc72c1a420bdbe425530dd19724214ceb44ec.tar.xz | |
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 <jsmart2021@gmail.com>
Reported-by: kbuild test robot <lkp@intel.com>
CC: kbuild test robot <lkp@intel.com>
CC: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/target/fc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c index 02d9751bb7ee..27fd3b5aa621 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]); |