linux-kernel - RE: [patch v11 - re-ordered 03/12] FIXME platform/mellanox: Remove redundant dev_err messages on device

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Message-ID: <AM4PR05MB33307B7EE13E93C681171C94A2E00@AM4PR05MB3330.eurprd05.prod.outlook.com>
Date:   Fri, 26 Jan 2018 16:59:32 +0000
From:   Vadim Pasternak <vadimp@...lanox.com>
To:     Darren Hart <dvhart@...radead.org>
CC:     "andy.shevchenko@...il.com" <andy.shevchenko@...il.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "jiri@...nulli.us" <jiri@...nulli.us>
Subject: RE: [patch v11 - re-ordered 03/12] FIXME platform/mellanox: Remove
 redundant dev_err messages on device_create



> -----Original Message-----
> From: Darren Hart [mailto:dvhart@...radead.org]
> Sent: Thursday, January 25, 2018 11:47 PM
> To: Vadim Pasternak <vadimp@...lanox.com>
> Cc: andy.shevchenko@...il.com; gregkh@...uxfoundation.org; linux-
> kernel@...r.kernel.org; platform-driver-x86@...r.kernel.org; jiri@...nulli.us
> Subject: Re: [patch v11 - re-ordered 03/12] FIXME platform/mellanox: Remove
> redundant dev_err messages on device_create
> 
> On Wed, Jan 24, 2018 at 08:33:37PM +0000, Vadim Pasternak wrote:
> > The upper layer will manage and report errors returned by the create
> > and destroy functions.
> >
> > FIXME: but it doesn't - we don't even check
> 
> I think we agreed to just drop this patch entirely, since this error is not checked
> elsewhere? Keeping the dev_err messages?
> 

Yes, we'll keep it.
We just had conflict in patch order and I wanted to fix it, staying as much as
possible aligned with the top of mellanox v10 branch.

However currently we still  have a problem in mellanox v11 after patch
platform/mellanox: mlxreg-hotplug: Modify to use a regmap interface
It dropped parameter device  in mlxreg_hotplug_device_create, which is
Used inside the routine.

I'll send a separate patch to fix it from top of v11. In other case it'll be
necessary to fix Modify to use a regmap interface  and re-send all from 
5-th patch in series.

Also we  should drop the patch:
platform/x86: mlx-platform: Simplify IO access to regmap context
It introduced the issue reported by sparse.

I am resending two last patches from review-dvhart-mellanox-v11 branch
and also patch with fix for mlxreg_hotplug_device_create, as:
0010-platform-x86-mlx-platform-Extend-register-map-config.patch
0011-platform-mellanox-mlxreg-hotplug-Add-check-for-negat.patch
0012-platform-mellanox-mlxreg-hotplug-Fix-issue-of-commit.patch

Thank you very much for your help,
Vadim.

> >
> > Signed-off-by: Vadim Pasternak <vadimp@...lanox.com>
> > Acked-by: Andy Shevchenko <andy.shevchenko@...il.com>
> > [dvhart: refactored into smaller functional changes]
> > Signed-off-by: Darren Hart (VMware) <dvhart@...radead.org>
> > ---
> >  drivers/platform/mellanox/mlxreg-hotplug.c | 7 +------
> >  1 file changed, 1 insertion(+), 6 deletions(-)
> >
> > diff --git a/drivers/platform/mellanox/mlxreg-hotplug.c
> > b/drivers/platform/mellanox/mlxreg-hotplug.c
> > index e55f576..0ccd327 100644
> > --- a/drivers/platform/mellanox/mlxreg-hotplug.c
> > +++ b/drivers/platform/mellanox/mlxreg-hotplug.c
> > @@ -187,16 +187,11 @@ static int mlxreg_hotplug_device_create(struct
> device *dev,
> >  					struct mlxreg_hotplug_device *item)  {
> >  	item->adapter = i2c_get_adapter(item->bus);
> > -	if (!item->adapter) {
> > -		dev_err(dev, "Failed to get adapter for bus %d\n",
> > -			item->bus);
> > +	if (!item->adapter)
> >  		return -EFAULT;
> > -	}
> >
> >  	item->client = i2c_new_device(item->adapter, &item->brdinfo);
> >  	if (!item->client) {
> > -		dev_err(dev, "Failed to create client %s at bus %d at addr
> 0x%02x\n",
> > -			item->brdinfo.type, item->bus, item->brdinfo.addr);
> >  		i2c_put_adapter(item->adapter);
> >  		item->adapter = NULL;
> >  		return -EFAULT;
> > --
> > 2.1.4
> >
> >
> 
> --
> Darren Hart
> VMware Open Source Technology Center