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authorTejun Heo <tj@kernel.org>2009-04-28 08:06:12 +0400
committerJens Axboe <jens.axboe@oracle.com>2009-04-28 10:14:51 +0400
commit467ca759fc83fc35cb7d15aec0d74c62cffc4481 (patch)
treec3b1e83b73df349ce246ada97775d2f7ed6ddd58 /drivers/block/swim3.c
parente091eb67af957bac4e4f7410c5d1aa263ee483a4 (diff)
downloadlinux-467ca759fc83fc35cb7d15aec0d74c62cffc4481.tar.xz
swim3: clean up request completion paths
swim3 curiously tries to update request parameters before calling __blk_end_request() when __blk_end_request() will do it anyway, and it updates request for partial completion manually instead of using blk_update_request(). Also, it does some spurious checks on rq such as testing whether rq->sector is negative or current_nr_sectors is zero right after fetching. Drop unnecessary stuff and use standard block layer mechanisms. [ Impact: cleanup ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/block/swim3.c')
-rw-r--r--drivers/block/swim3.c31
1 files changed, 5 insertions, 26 deletions
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index 5904f7b73c6e..424855945b9b 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -319,14 +319,10 @@ static void start_request(struct floppy_state *fs)
req->errors, req->current_nr_sectors);
#endif
- if (req->sector < 0 || req->sector >= fs->total_secs) {
+ if (req->sector >= fs->total_secs) {
__blk_end_request_cur(req, -EIO);
continue;
}
- if (req->current_nr_sectors == 0) {
- __blk_end_request_cur(req, 0);
- continue;
- }
if (fs->ejected) {
__blk_end_request_cur(req, -EIO);
continue;
@@ -593,8 +589,6 @@ static void xfer_timeout(unsigned long data)
struct floppy_state *fs = (struct floppy_state *) data;
struct swim3 __iomem *sw = fs->swim3;
struct dbdma_regs __iomem *dr = fs->dma;
- struct dbdma_cmd *cp = fs->dma_cmd;
- unsigned long s;
int n;
fs->timeout_pending = 0;
@@ -605,14 +599,6 @@ static void xfer_timeout(unsigned long data)
out_8(&sw->intr_enable, 0);
out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
out_8(&sw->select, RELAX);
- if (rq_data_dir(fd_req) == WRITE)
- ++cp;
- if (ld_le16(&cp->xfer_status) != 0)
- s = fs->scount - ((ld_le16(&cp->res_count) + 511) >> 9);
- else
- s = 0;
- fd_req->sector += s;
- fd_req->current_nr_sectors -= s;
printk(KERN_ERR "swim3: timeout %sing sector %ld\n",
(rq_data_dir(fd_req)==WRITE? "writ": "read"), (long)fd_req->sector);
__blk_end_request_cur(fd_req, -EIO);
@@ -719,9 +705,7 @@ static irqreturn_t swim3_interrupt(int irq, void *dev_id)
if (intr & ERROR_INTR) {
n = fs->scount - 1 - resid / 512;
if (n > 0) {
- fd_req->sector += n;
- fd_req->current_nr_sectors -= n;
- fd_req->buffer += n * 512;
+ blk_update_request(fd_req, 0, n << 9);
fs->req_sector += n;
}
if (fs->retries < 5) {
@@ -745,13 +729,7 @@ static irqreturn_t swim3_interrupt(int irq, void *dev_id)
start_request(fs);
break;
}
- fd_req->sector += fs->scount;
- fd_req->current_nr_sectors -= fs->scount;
- fd_req->buffer += fs->scount * 512;
- if (fd_req->current_nr_sectors <= 0) {
- __blk_end_request_cur(fd_req, 0);
- fs->state = idle;
- } else {
+ if (__blk_end_request(fd_req, 0, fs->scount << 9)) {
fs->req_sector += fs->scount;
if (fs->req_sector > fs->secpertrack) {
fs->req_sector -= fs->secpertrack;
@@ -761,7 +739,8 @@ static irqreturn_t swim3_interrupt(int irq, void *dev_id)
}
}
act(fs);
- }
+ } else
+ fs->state = idle;
}
if (fs->state == idle)
start_request(fs);