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| author | Ming Lei <ming.lei@redhat.com> | 2022-07-16 11:53:44 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-07-16 14:32:48 +0200 |
| commit | f2450f8a2c1ec3e88d6674f747b913aa5f21fa59 (patch) | |
| tree | 785d4f0a0122b3de0199e15795e4925086fdc01a /drivers/block | |
| parent | blktrace: Fix the blk_fill_rwbs() kernel-doc header (diff) | |
| download | linux-f2450f8a2c1ec3e88d6674f747b913aa5f21fa59.tar.xz linux-f2450f8a2c1ec3e88d6674f747b913aa5f21fa59.zip | |
ublk_drv: fix build warning with -Wmaybe-uninitialized and one sparse warning
After applying -Wmaybe-uninitialized manually, two build warnings are
triggered:
drivers/block/ublk_drv.c:940:11: warning: ‘io’ may be used uninitialized [-Wmaybe-uninitialized]
940 | io->flags &= ~UBLK_IO_FLAG_ACTIVE;
drivers/block/ublk_drv.c: In function ‘ublk_ctrl_uring_cmd’:
drivers/block/ublk_drv.c:1531:9: warning: ‘ret’ may be used uninitialized [-Wmaybe-uninitialized]
Fix the 1st one by removing 'io->flags &= ~UBLK_IO_FLAG_ACTIVE;' which
isn't needed since the function always return successfully after setting
this flag.
Fix the 2nd one by always initializing 'ret'.
Also fix another sparse warning of 'sparse: sparse: incorrect type in return
expression' by changing return type of ublk_setup_iod().
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220716095344.222674-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/ublk_drv.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index f10c4319dc1f..2c1b01d7f27d 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -407,7 +407,7 @@ static inline unsigned int ublk_req_build_flags(struct request *req) return flags; } -static int ublk_setup_iod(struct ublk_queue *ubq, struct request *req) +static blk_status_t ublk_setup_iod(struct ublk_queue *ubq, struct request *req) { struct ublksrv_io_desc *iod = ublk_get_iod(ubq, req->tag); struct ublk_io *io = &ubq->ios[req->tag]; @@ -937,7 +937,6 @@ static int ublk_ch_uring_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags) return -EIOCBQUEUED; out: - io->flags &= ~UBLK_IO_FLAG_ACTIVE; io_uring_cmd_done(cmd, ret, 0); pr_devel("%s: complete: cmd op %d, tag %d ret %x io_flags %x\n", __func__, cmd_op, tag, ret, io->flags); @@ -1299,13 +1298,12 @@ static int ublk_ctrl_get_queue_affinity(struct io_uring_cmd *cmd) struct ublk_device *ub; unsigned long queue; unsigned int retlen; - int ret; + int ret = -EINVAL; ub = ublk_get_device_from_id(header->dev_id); if (!ub) goto out; - ret = -EINVAL; queue = header->data[0]; if (queue >= ub->dev_info.nr_hw_queues) goto out; |