linux-kernel - Re: [PATCH] phy: intel: Eliminate unnecessary assignment in intel_cbphy_set

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Date:   Wed, 24 Jun 2020 17:43:23 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH] phy: intel: Eliminate unnecessary assignment in
 intel_cbphy_set_mode

On 15-06-20, 17:30, Nathan Chancellor wrote:
> On Fri, May 22, 2020 at 08:50:43PM -0700, Nathan Chancellor wrote:
> > Clang warns:
> > 
> > drivers/phy/intel/phy-intel-combo.c:202:34: warning: implicit conversion
> > from enumeration type 'enum intel_phy_mode' to different enumeration
> > type 'enum intel_combo_mode' [-Wenum-conversion]
> >         enum intel_combo_mode cb_mode = PHY_PCIE_MODE;
> >                               ~~~~~~~   ^~~~~~~~~~~~~
> > 1 warning generated.
> > 
> > The correct enum to use would be PCIE0_PCIE1_MODE. However, eliminating
> > this assignment is a little better because the switch statement always
> > assigns a new value to cb_mode, which also takes care of the warning.
> > 
> > Fixes: ac0a95a3ea78 ("phy: intel: Add driver support for ComboPhy")
> > Link: https://github.com/ClangBuiltLinux/linux/issues/1034
> > Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
> > ---
> >  drivers/phy/intel/phy-intel-combo.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/phy/intel/phy-intel-combo.c b/drivers/phy/intel/phy-intel-combo.c
> > index c2a35be4cdfb..4bc1276ecf23 100644
> > --- a/drivers/phy/intel/phy-intel-combo.c
> > +++ b/drivers/phy/intel/phy-intel-combo.c
> > @@ -199,9 +199,9 @@ static int intel_cbphy_pcie_dis_pad_refclk(struct intel_cbphy_iphy *iphy)
> >  
> >  static int intel_cbphy_set_mode(struct intel_combo_phy *cbphy)
> >  {
> > -	enum intel_combo_mode cb_mode = PHY_PCIE_MODE;
> >  	enum aggregated_mode aggr = cbphy->aggr_mode;
> >  	struct device *dev = cbphy->dev;
> > +	enum intel_combo_mode cb_mode;
> >  	enum intel_phy_mode mode;
> >  	int ret;
> >  
> > 
> > base-commit: c11d28ab4a691736e30b49813fb801847bd44e83
> > -- 
> > 2.27.0.rc0
> > 
> 
> Gentle ping for review. Nick did comment that maybe keeping the
> assignment and tidying up one of the switch cases would be better but
> every maintainer has their preference. This warning has slipped into
> mainline so it would be nice to get it cleaned up.

Sorry for the delay, I have applied Anrd patch for this already and
should be in linux-next tomorrow

-- 
~Vinod