From d0be5ec8693944c2e2fc0de70fda9dbc1b93bd7d Mon Sep 17 00:00:00 2001 From: "Stephen M. Cameron" Date: Tue, 3 May 2011 14:58:49 -0500 Subject: [PATCH] [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 Signed-off-by: James Bottomley Signed-off-by: James Bottomley --- drivers/scsi/hpsa.h | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h index 621a1530054a..98c97ca21223 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; -- 2.39.5