[PATCH 5.1 36/70] memstick: mspro_block: Fix an error code in mspro_block_issue_req()

[Greg Kroah-Hartman]

From: Dan Carpenter <dan.carpen...@oracle.com>

commit 61009f82a93f7c0b33cd9b3b263a6ab48f8b49d4 upstream.

We accidentally changed the error code from -EAGAIN to 1 when we did the
blk-mq conversion.

Maybe a contributing factor to this mistake is that it wasn't obvious
that the "while (chunk) {" condition is always true.  I have cleaned
that up as well.

Fixes: d0be12274dad ("mspro_block: convert to blk-mq")
Cc: sta...@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Ulf Hansson <ulf.hans...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/memstick/core/mspro_block.c |   13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -694,13 +694,13 @@ static void h_mspro_block_setup_cmd(stru
 
 /*** Data transfer ***/
 
-static int mspro_block_issue_req(struct memstick_dev *card, bool chunk)
+static int mspro_block_issue_req(struct memstick_dev *card)
 {
        struct mspro_block_data *msb = memstick_get_drvdata(card);
        u64 t_off;
        unsigned int count;
 
-       while (chunk) {
+       while (true) {
                msb->current_page = 0;
                msb->current_seg = 0;
                msb->seg_count = blk_rq_map_sg(msb->block_req->q,
@@ -709,6 +709,7 @@ static int mspro_block_issue_req(struct
 
                if (!msb->seg_count) {
                        unsigned int bytes = blk_rq_cur_bytes(msb->block_req);
+                       bool chunk;
 
                        chunk = blk_update_request(msb->block_req,
                                                        BLK_STS_RESOURCE,
@@ -718,7 +719,7 @@ static int mspro_block_issue_req(struct
                        __blk_mq_end_request(msb->block_req,
                                                BLK_STS_RESOURCE);
                        msb->block_req = NULL;
-                       break;
+                       return -EAGAIN;
                }
 
                t_off = blk_rq_pos(msb->block_req);
@@ -735,8 +736,6 @@ static int mspro_block_issue_req(struct
                memstick_new_req(card->host);
                return 0;
        }
-
-       return 1;
 }
 
 static int mspro_block_complete_req(struct memstick_dev *card, int error)
@@ -779,7 +778,7 @@ static int mspro_block_complete_req(stru
                chunk = blk_update_request(msb->block_req,
                                errno_to_blk_status(error), t_len);
                if (chunk) {
-                       error = mspro_block_issue_req(card, chunk);
+                       error = mspro_block_issue_req(card);
                        if (!error)
                                goto out;
                } else {
@@ -849,7 +848,7 @@ static blk_status_t mspro_queue_rq(struc
        msb->block_req = bd->rq;
        blk_mq_start_request(bd->rq);
 
-       if (mspro_block_issue_req(card, true))
+       if (mspro_block_issue_req(card))
                msb->block_req = NULL;
 
        spin_unlock_irq(&msb->q_lock);