[PATCH 3/9] mtip32xx: return a blk_status_t from mtip_send_trim

[Christoph Hellwig]

This allows for better error propagation and simpler code.

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 drivers/block/mtip32xx/mtip32xx.c | 30 +++++++++++-------------------
 1 file changed, 11 insertions(+), 19 deletions(-)

diff --git a/drivers/block/mtip32xx/mtip32xx.c 
b/drivers/block/mtip32xx/mtip32xx.c
index 75a4ca0210f2..d5277bba0c02 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -1423,23 +1423,19 @@ static int mtip_get_smart_attr(struct mtip_port *port, 
unsigned int id,
  * @dd         pointer to driver_data structure
  * @lba                starting lba
  * @len                # of 512b sectors to trim
- *
- * return value
- *      -ENOMEM                Out of dma memory
- *      -EINVAL                Invalid parameters passed in, trim not supported
- *      -EIO           Error submitting trim request to hw
  */
-static int mtip_send_trim(struct driver_data *dd, unsigned int lba,
-                               unsigned int len)
+static blk_status_t mtip_send_trim(struct driver_data *dd, unsigned int lba,
+               unsigned int len)
 {
-       int i, rv = 0;
        u64 tlba, tlen, sect_left;
        struct mtip_trim_entry *buf;
        dma_addr_t dma_addr;
        struct host_to_dev_fis fis;
+       blk_status_t ret = BLK_STS_OK;
+       int i;
 
        if (!len || dd->trim_supp == false)
-               return -EINVAL;
+               return BLK_STS_IOERR;
 
        /* Trim request too big */
        WARN_ON(len > (MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES));
@@ -1454,7 +1450,7 @@ static int mtip_send_trim(struct driver_data *dd, 
unsigned int lba,
        buf = dmam_alloc_coherent(&dd->pdev->dev, ATA_SECT_SIZE, &dma_addr,
                                                                GFP_KERNEL);
        if (!buf)
-               return -ENOMEM;
+               return BLK_STS_RESOURCE;
        memset(buf, 0, ATA_SECT_SIZE);
 
        for (i = 0, sect_left = len, tlba = lba;
@@ -1486,10 +1482,10 @@ static int mtip_send_trim(struct driver_data *dd, 
unsigned int lba,
                                        ATA_SECT_SIZE,
                                        0,
                                        MTIP_TRIM_TIMEOUT_MS) < 0)
-               rv = -EIO;
+               ret = BLK_STS_IOERR;
 
        dmam_free_coherent(&dd->pdev->dev, ATA_SECT_SIZE, buf, dma_addr);
-       return rv;
+       return ret;
 }
 
 /*
@@ -3634,13 +3630,9 @@ static blk_status_t mtip_queue_rq(struct blk_mq_hw_ctx 
*hctx,
 
        blk_mq_start_request(rq);
 
-       if (req_op(rq) == REQ_OP_DISCARD) {
-               if (mtip_send_trim(dd, blk_rq_pos(rq), blk_rq_sectors(rq)) < 0)
-                       return BLK_STS_IOERR;
-       } else {
-               mtip_hw_submit_io(dd, rq, cmd, hctx);
-       }
-
+       if (req_op(rq) == REQ_OP_DISCARD)
+               return mtip_send_trim(dd, blk_rq_pos(rq), blk_rq_sectors(rq));
+       mtip_hw_submit_io(dd, rq, cmd, hctx);
        return BLK_STS_OK;
 }
 
-- 
2.19.1