linux-kernel - Re: [PATCH 084/190] Revert "net: ieee802154: fix missing checks for regmap_update

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Date:   Tue, 27 Apr 2021 15:39:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Stefan Schmidt <stefan@...enfreihafen.org>
Cc:     linux-kernel@...r.kernel.org, Kangjie Lu <kjlu@....edu>,
        Mukesh Ojha <mojha@...eaurora.org>
Subject: Re: [PATCH 084/190] Revert "net: ieee802154: fix missing checks for
 regmap_update_bits"

On Wed, Apr 21, 2021 at 03:23:06PM +0200, Stefan Schmidt wrote:
> Hello.
> 
> On 21.04.21 14:59, Greg Kroah-Hartman wrote:
> > This reverts commit 22e8860cf8f777fbf6a83f2fb7127f682a8e9de4.
> > 
> > Commits from @umn.edu addresses have been found to be submitted in "bad
> > faith" to try to test the kernel community's ability to review "known
> > malicious" changes.  The result of these submissions can be found in a
> > paper published at the 42nd IEEE Symposium on Security and Privacy
> > entitled, "Open Source Insecurity: Stealthily Introducing
> > Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
> > of Minnesota) and Kangjie Lu (University of Minnesota).
> > 
> > Because of this, all submissions from this group must be reverted from
> > the kernel tree and will need to be re-reviewed again to determine if
> > they actually are a valid fix.  Until that work is complete, remove this
> > change to ensure that no problems are being introduced into the
> > codebase.
> > 
> > Cc: Kangjie Lu <kjlu@....edu>
> > Cc: Mukesh Ojha <mojha@...eaurora.org>
> > Cc: Stefan Schmidt <stefan@...enfreihafen.org>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > ---
> >   drivers/net/ieee802154/mcr20a.c | 6 ------
> >   1 file changed, 6 deletions(-)
> > 
> > diff --git a/drivers/net/ieee802154/mcr20a.c b/drivers/net/ieee802154/mcr20a.c
> > index 8dc04e2590b1..2ce5b41983f8 100644
> > --- a/drivers/net/ieee802154/mcr20a.c
> > +++ b/drivers/net/ieee802154/mcr20a.c
> > @@ -524,8 +524,6 @@ mcr20a_start(struct ieee802154_hw *hw)
> >   	dev_dbg(printdev(lp), "no slotted operation\n");
> >   	ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
> >   				 DAR_PHY_CTRL1_SLOTTED, 0x0);
> > -	if (ret < 0)
> > -		return ret;
> >   	/* enable irq */
> >   	enable_irq(lp->spi->irq);
> > @@ -533,15 +531,11 @@ mcr20a_start(struct ieee802154_hw *hw)
> >   	/* Unmask SEQ interrupt */
> >   	ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL2,
> >   				 DAR_PHY_CTRL2_SEQMSK, 0x0);
> > -	if (ret < 0)
> > -		return ret;
> >   	/* Start the RX sequence */
> >   	dev_dbg(printdev(lp), "start the RX sequence\n");
> >   	ret = regmap_update_bits(lp->regmap_dar, DAR_PHY_CTRL1,
> >   				 DAR_PHY_CTRL1_XCVSEQ_MASK, MCR20A_XCVSEQ_RX);
> > -	if (ret < 0)
> > -		return ret;
> >   	return 0;
> >   }
> > 
> 
> 
> Acked-by: Stefan Schmidt <stefan@...enfreihafen.org>

Thanks for the review, but in re-reviewing this, I'll drop the revert as
it looks correct to me.

thanks,

greg k-h