null_blk: consistently use blk_status_t

No need to mix errno and blk_status_t error types. Just use the standard
block layer type.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Tested-by: Hans Holmberg <hans.holmberg@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index e2597ea696bff59ff305d984dfbfa659e87499cb..2f64cd713584b0044f22b0b6c3abf335248a9360 100644 (file)
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1129,7 +1129,7 @@ again:
        return 0;
 }
 
-static int copy_to_nullb(struct nullb *nullb, struct page *source,
+static blk_status_t copy_to_nullb(struct nullb *nullb, struct page *source,
        unsigned int off, sector_t sector, size_t n, bool is_fua)
 {
        size_t temp, count = 0;
@@ -1146,7 +1146,7 @@ static int copy_to_nullb(struct nullb *nullb, struct page *source,
                t_page = null_insert_page(nullb, sector,
                        !null_cache_active(nullb) || is_fua);
                if (!t_page)
-                       return -ENOSPC;
+                       return BLK_STS_NOSPC;
 
                memcpy_page(t_page->page, offset, source, off + count, temp);
 
@@ -1158,7 +1158,7 @@ static int copy_to_nullb(struct nullb *nullb, struct page *source,
                count += temp;
                sector += temp >> SECTOR_SHIFT;
        }
-       return 0;
+       return BLK_STS_OK;
 }
 
 static void copy_from_nullb(struct nullb *nullb, struct page *dest,
@@ -1233,13 +1233,13 @@ static blk_status_t null_handle_flush(struct nullb *nullb)
        return errno_to_blk_status(err);
 }
 
-static int null_transfer(struct nullb *nullb, struct page *page,
+static blk_status_t null_transfer(struct nullb *nullb, struct page *page,
        unsigned int len, unsigned int off, bool is_write, sector_t sector,
        bool is_fua)
 {
        struct nullb_device *dev = nullb->dev;
+       blk_status_t err = BLK_STS_OK;
        unsigned int valid_len = len;
-       int err = 0;
 
        if (!is_write) {
                if (dev->zoned)
@@ -1273,7 +1273,7 @@ static blk_status_t null_handle_data_transfer(struct nullb_cmd *cmd,
 {
        struct request *rq = blk_mq_rq_from_pdu(cmd);
        struct nullb *nullb = cmd->nq->dev->nullb;
-       int err = 0;
+       blk_status_t err = BLK_STS_OK;
        unsigned int len;
        sector_t sector = blk_rq_pos(rq);
        unsigned int max_bytes = nr_sectors << SECTOR_SHIFT;
@@ -1298,7 +1298,7 @@ static blk_status_t null_handle_data_transfer(struct nullb_cmd *cmd,
        }
        spin_unlock_irq(&nullb->lock);
 
-       return errno_to_blk_status(err);
+       return err;
 }
 
 static inline blk_status_t null_handle_throttled(struct nullb_cmd *cmd)