diff options
| author | Stephen M. Cameron <scameron@beardog.cce.hp.com> | 2011-05-03 14:58:49 -0500 |
|---|---|---|
| committer | James Bottomley <jbottomley@parallels.com> | 2011-05-17 11:01:43 +0400 |
| commit | d0be5ec8693944c2e2fc0de70fda9dbc1b93bd7d (patch) | |
| tree | 79052aef4a963d9cba5040662b98a2bbe77c7ff9 /drivers/scsi/hpsa.h | |
| parent | 72ef0e5757c160fc627d2c89b6379bc102ccab5c (diff) | |
[SCSI] hpsa: do readl after writel in main i/o path to ensure commands don't get lost.
Apparently we've been doin it rong for a decade, but only lately do we
run into problems.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/hpsa.h')
| -rw-r--r-- | drivers/scsi/hpsa.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h index 621a1530054..98c97ca2122 100644 --- a/drivers/scsi/hpsa.h +++ b/drivers/scsi/hpsa.h @@ -212,6 +212,7 @@ static void SA5_submit_command(struct ctlr_info *h, dev_dbg(&h->pdev->dev, "Sending %x, tag = %x\n", c->busaddr, c->Header.Tag.lower); writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET); + (void) readl(h->vaddr + SA5_REQUEST_PORT_OFFSET); h->commands_outstanding++; if (h->commands_outstanding > h->max_outstanding) h->max_outstanding = h->commands_outstanding; |