target/rd: simplify the page/offset computation

Breakout rd_MEMCPY_do_task() usage of do_div() to tmp value during
rd_request->rd_page assignment.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 6d8a688..6119ed5 100644 (file)
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -583,14 +583,12 @@ static int rd_MEMCPY_do_task(struct se_task *task)
 {
        struct se_device *dev = task->task_se_cmd->se_dev;
        struct rd_request *req = RD_REQ(task);
-       unsigned long long lba;
+       u64 tmp;
        int ret;
 
-       req->rd_page = (task->task_lba * dev->se_sub_dev->se_dev_attrib.block_size) / PAGE_SIZE;
-       lba = task->task_lba;
-       req->rd_offset = (do_div(lba,
-                         (PAGE_SIZE / dev->se_sub_dev->se_dev_attrib.block_size))) *
-                          dev->se_sub_dev->se_dev_attrib.block_size;
+       tmp = task->task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
+       req->rd_offset = do_div(tmp, PAGE_SIZE);
+       req->rd_page = tmp;
        req->rd_size = task->task_size;
 
        if (task->task_data_direction == DMA_FROM_DEVICE)