mg_disk: Add missing ready status check on mg_write()
When last sector is written, ready bit of status register should be
checked.
Signed-off-by: unsik Kim <donari75@gmail.com>
Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
index 19917d5..6d7fbaa 100644
--- a/drivers/block/mg_disk.c
+++ b/drivers/block/mg_disk.c
@@ -524,16 +524,16 @@
static void mg_write(struct request *req)
{
struct mg_host *host = req->rq_disk->private_data;
- bool rem;
+ unsigned int rem = blk_rq_sectors(req);
- if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req),
+ if (mg_out(host, blk_rq_pos(req), rem,
MG_CMD_WR, NULL) != MG_ERR_NONE) {
mg_bad_rw_intr(host);
return;
}
MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
- blk_rq_sectors(req), blk_rq_pos(req), req->buffer);
+ rem, blk_rq_pos(req), req->buffer);
if (mg_wait(host, ATA_DRQ,
MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
@@ -541,25 +541,23 @@
return;
}
- mg_write_one(host, req);
-
- outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
-
do {
- if (blk_rq_sectors(req) > 1 &&
- mg_wait(host, ATA_DRQ,
- MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
+ mg_write_one(host, req);
+
+ outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
+ MG_REG_COMMAND);
+
+ rem--;
+ if (rem > 1 && mg_wait(host, ATA_DRQ,
+ MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
+ mg_bad_rw_intr(host);
+ return;
+ } else if (mg_wait(host, MG_STAT_READY,
+ MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
mg_bad_rw_intr(host);
return;
}
-
- rem = mg_end_request(host, 0, MG_SECTOR_SIZE);
- if (rem)
- mg_write_one(host, req);
-
- outb(MG_CMD_WR_CONF,
- (unsigned long)host->dev_base + MG_REG_COMMAND);
- } while (rem);
+ } while (mg_end_request(host, 0, MG_SECTOR_SIZE));
}
static void mg_read_intr(struct mg_host *host)