lkml.org 
[lkml]   [2011]   [Jul]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] cciss: do not attempt to read from a write-only register
    On Thu, 21 Jul 2011 13:16:01 -0500
    "Stephen M. Cameron" <scameron@beardog.cce.hp.com> wrote:

    > From: Stephen M. Cameron <scameron@beardog.cce.hp.com>
    >
    > Most smartarrays will tolerate it, but some new ones don't.
    > Without this change some newer Smart Arrays will lock up
    > and i/o will grind to a halt.
    >
    > Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>

    No Cc: <stable@kernel.org>?

    > drivers/block/cciss.h | 2 +-
    > 1 files changed, 1 insertions(+), 1 deletions(-)
    >
    > diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
    > index 16b4d58..c049548 100644
    > --- a/drivers/block/cciss.h
    > +++ b/drivers/block/cciss.h
    > @@ -223,7 +223,7 @@ static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
    > h->ctlr, c->busaddr);
    > #endif /* CCISS_DEBUG */
    > writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
    > - readl(h->vaddr + SA5_REQUEST_PORT_OFFSET);
    > + readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
    > h->commands_outstanding++;
    > if ( h->commands_outstanding > h->max_outstanding)
    > h->max_outstanding = h->commands_outstanding;


    \
     
     \ /
      Last update: 2011-07-23 00:41    [W:0.024 / U:62.248 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site