block: remove more NULL checks after bdev_get_queue()

bdev_get_queue() never returns NULL. Several commits [1][2] have been made
before to remove such superfluous checks, but some still remained.

For places where bdev_get_queue() is called solely for NULL checks, it is
removed entirely.

[1] commit ec9fd2a13d74 ("blk-lib: don't check bdev_get_queue() NULL check")
[2] commit fea127b36c93 ("block: remove superfluous check for request queue in bdev_is_zoned()")

Signed-off-by: Juhyung Park <qkrwngud825@gmail.com>
Reviewed-by: Pankaj Raghav <p.raghav@samsung.com>
Link: https://lore.kernel.org/r/20230203024029.48260-1-qkrwngud825@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 614b575..fce9082 100644 (file)
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -334,17 +334,12 @@ int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
 {
        void __user *argp = (void __user *)arg;
        struct zone_report_args args;
-       struct request_queue *q;
        struct blk_zone_report rep;
        int ret;
 
        if (!argp)
                return -EINVAL;
 
-       q = bdev_get_queue(bdev);
-       if (!q)
-               return -ENXIO;
-
        if (!bdev_is_zoned(bdev))
                return -ENOTTY;
 
@@ -391,7 +386,6 @@ int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
                           unsigned int cmd, unsigned long arg)
 {
        void __user *argp = (void __user *)arg;
-       struct request_queue *q;
        struct blk_zone_range zrange;
        enum req_op op;
        int ret;
@@ -399,10 +393,6 @@ int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
        if (!argp)
                return -EINVAL;
 
-       q = bdev_get_queue(bdev);
-       if (!q)
-               return -ENXIO;
-
        if (!bdev_is_zoned(bdev))
                return -ENOTTY;
 

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b9637d6..89dd9b0 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1276,12 +1276,7 @@ static inline bool bdev_nowait(struct block_device *bdev)
 
 static inline enum blk_zoned_model bdev_zoned_model(struct block_device *bdev)
 {
-       struct request_queue *q = bdev_get_queue(bdev);
-
-       if (q)
-               return blk_queue_zoned_model(q);
-
-       return BLK_ZONED_NONE;
+       return blk_queue_zoned_model(bdev_get_queue(bdev));
 }
 
 static inline bool bdev_is_zoned(struct block_device *bdev)

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 5743be5..d5d9451 100644 (file)
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -729,14 +729,10 @@ EXPORT_SYMBOL_GPL(blk_trace_startstop);
  **/
 int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
 {
-       struct request_queue *q;
+       struct request_queue *q = bdev_get_queue(bdev);
        int ret, start = 0;
        char b[BDEVNAME_SIZE];
 
-       q = bdev_get_queue(bdev);
-       if (!q)
-               return -ENXIO;
-
        mutex_lock(&q->debugfs_mutex);
 
        switch (cmd) {