target: Make spc_get_write_same_sectors return sector_t

We already expect TFO->get_blocks() to return sector_t for zero value case
when doing WRITE_SAME to the end of the backend device, so go ahead and return
sector_t from spc_get_write_same_sectors() to handle this case properly.

Also, update the single iblock_execute_write_same() caller of this code.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

3 files changed, 3 insertions, 3 deletions

diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 34f258b4d37f..b526d23dcd4f 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -481,7 +481,7 @@ iblock_execute_write_same(struct se_cmd *cmd)
         struct bio *bio;
         struct bio_list list;
         sector_t block_lba = cmd->t_task_lba;
-        unsigned int sectors = spc_get_write_same_sectors(cmd);
+        sector_t sectors = spc_get_write_same_sectors(cmd);
 
         sg = &cmd->t_data_sg[0];
 
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 94fd004ea3fc..26a6d183ccb1 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -107,7 +107,7 @@ sbc_emulate_readcapacity_16(struct se_cmd *cmd)
         return 0;
 }
 
-int spc_get_write_same_sectors(struct se_cmd *cmd)
+sector_t spc_get_write_same_sectors(struct se_cmd *cmd)
 {
         u32 num_blocks;
 
diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 3393ab10766c..507910992c59 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -52,7 +52,7 @@ void	target_complete_cmd(struct se_cmd *, u8);
 
 sense_reason_t  spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
 sense_reason_t  spc_emulate_report_luns(struct se_cmd *cmd);
-int     spc_get_write_same_sectors(struct se_cmd *cmd);
+sector_t        spc_get_write_same_sectors(struct se_cmd *cmd);
 
 sense_reason_t  sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
 u32     sbc_get_device_rev(struct se_device *dev);