From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomas Henzl Subject: Re: [PATCH 01/16] hpsa: do readl after writel in main i/o path to ensure commands don't get lost. Date: Wed, 04 May 2011 13:15:50 +0200 Message-ID: <4DC13566.5070203@redhat.com> References: <20110503195750.5478.54853.stgit@beardog.cce.hp.com> <20110503195849.5478.13229.stgit@beardog.cce.hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20110503195849.5478.13229.stgit@beardog.cce.hp.com> Sender: linux-kernel-owner@vger.kernel.org To: "Stephen M. Cameron" Cc: james.bottomley@hansenpartnership.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, smcameron@yahoo.com, akpm@linux-foundation.org, mikem@beardog.cce.hp.com List-Id: linux-scsi@vger.kernel.org On 05/03/2011 09:58 PM, Stephen M. Cameron wrote: > From: Stephen M. Cameron > > Apparently we've been doin it rong for a decade, but only lately do we > run into problems. > > Signed-off-by: Stephen M. Cameron > --- > 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 621a153..98c97ca 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); > Hi, a small nit - the (void) ^ is I think not needed for gcc and isn't present in the cciss.h patch Tomas > h->commands_outstanding++; > if (h->commands_outstanding > h->max_outstanding) > h->max_outstanding = h->commands_outstanding; > > -- > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >