From a85a00a699740f6f9863f88aef22060fe1534681 Mon Sep 17 00:00:00 2001 From: unsik Kim Date: Tue, 28 Jul 2009 08:57:33 +0200 Subject: [PATCH] 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 Acked-by: Bartlomiej Zolnierkiewicz Signed-off-by: Jens Axboe --- drivers/block/mg_disk.c | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c index 19917d5481bd..6d7fbaa92248 100644 --- a/drivers/block/mg_disk.c +++ b/drivers/block/mg_disk.c @@ -524,16 +524,16 @@ static void mg_write_one(struct mg_host *host, struct request *req) 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 @@ static void mg_write(struct request *req) return; } - mg_write_one(host, req); + do { + mg_write_one(host, req); - outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); + 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) { + 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) -- 2.34.1