From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: Dashi DS1 Cao <caods1@lenovo.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-scsi <linux-scsi@vger.kernel.org>,
stable <stable@vger.kernel.org>
Subject: Re: version 3.18.44 to 3.18.45 introduced a bug in "drivers/scsi/megaraid/megaraid_sas_base.c"
Date: Tue, 13 Dec 2016 08:30:13 -0800 [thread overview]
Message-ID: <20161213163013.GB20693@kroah.com> (raw)
In-Reply-To: <a9788b9c-6361-f79e-f851-e8c4871571cb@infradead.org>
On Tue, Dec 13, 2016 at 08:08:27AM -0800, Randy Dunlap wrote:
> [adding other lists + gregkh]
>
>
> On 12/13/16 02:56, Dashi DS1 Cao wrote:
> > --- a/drivers/scsi/megaraid/megaraid_sas_base.c
> > +++ b/drivers/scsi/megaraid/megaraid_sas_base.c
> > @@ -1614,16 +1614,13 @@ megasas_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
> > goto out_done;
> > }
> >
> > - switch (scmd->cmnd[0]) {
> > - case SYNCHRONIZE_CACHE:
> > - /*
> > - * FW takes care of flush cache on its own
> > - * No need to send it down
> > - */
> > + /*
> > + * FW takes care of flush cache on its own for Virtual Disk.
> > + * No need to send it down for VD. For JBOD send SYNCHRONIZE_CACHE to FW.
> > + */
> > + if ((scmd->cmnd[0] == SYNCHRONIZE_CACHE) && MEGASAS_IS_LOGICAL(scmd)) {
> > scmd->result = DID_OK << 16;
> > goto out_done;
> > - default:
> > - break;
> > }
> >
> > if (instance->instancet->build_and_issue_cmd(instance, scmd)) {
> >
> > MEGASAS_IS_LOGICAL is defined to be a macro with '?' operator, which has a lower precedence than '&&'.
> > The macro should have been defined as:
> > --- a/drivers/scsi/megaraid/megaraid_sas.h
> > +++ b/drivers/scsi/megaraid/megaraid_sas.h
> > @@ -1823,7 +1823,7 @@ struct megasas_instance_template {
> > };
> >
> > #define MEGASAS_IS_LOGICAL(scp) \
> > - (scp->device->channel < MEGASAS_MAX_PD_CHANNELS) ? 0 : 1
> > + ((scp->device->channel < MEGASAS_MAX_PD_CHANNELS) ? 0 : 1)
> >
> > #define MEGASAS_DEV_INDEX(inst, scp) \
> > ((scp->device->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL) + \
> >
> > Dashi Cao
> >
I don't maintain 3.18-stable :)
thanks,
greg k-h
next prev parent reply other threads:[~2016-12-13 16:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-13 10:56 version 3.18.44 to 3.18.45 introduced a bug in "drivers/scsi/megaraid/megaraid_sas_base.c" Dashi DS1 Cao
2016-12-13 16:08 ` Randy Dunlap
2016-12-13 16:30 ` Greg Kroah-Hartman [this message]
2016-12-13 16:33 ` Randy Dunlap
2016-12-13 16:43 ` James Bottomley
2016-12-13 16:47 ` Greg Kroah-Hartman
2016-12-13 20:51 ` alexander.levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20161213163013.GB20693@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=caods1@lenovo.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=rdunlap@infradead.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).