linux-kernel - Re: [PATCH V7 4/7] LPC: Support the device-tree LPC host on Hip06/Hip07 (fwd)

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Date:   Tue, 14 Mar 2017 06:37:20 +0100 (CET)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     "zhichang.yuan" <yuanzhichang@...ilicon.com>
cc:     catalin.marinas@....com, will.deacon@....com, robh+dt@...nel.org,
        frowand.list@...il.com, bhelgaas@...gle.com, rafael@...nel.org,
        mark.rutland@....com, rjw@...ysocki.net, arnd@...db.de,
        linux-arm-kernel@...ts.infradead.org, linux-acpi@...r.kernel.org,
        lorenzo.pieralisi@....com, benh@...nel.crashing.org,
        linux-kernel@...r.kernel.org, linuxarm@...wei.com,
        devicetree@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-serial@...r.kernel.org, minyard@....org, liviu.dudau@....com,
        zourongrong@...il.com, john.garry@...wei.com,
        gabriele.paoloni@...wei.com, zhichang.yuan02@...il.com,
        kantyzc@....com, xuwei5@...ilicon.com,
        "zhichang.yuan" <yuanzhichang@...ilicon.com>, kbuild-all@...org
Subject: Re: [PATCH V7 4/7] LPC: Support the device-tree LPC host on Hip06/Hip07
 (fwd)

Line 460 looks suspicious.  Can tmprange be different than range but not
be an ERR_PTR?  If so, lpcdev->io_host will have an invalid value.

julia

---------- Forwarded message ----------
Date: Tue, 14 Mar 2017 13:12:05 +0800
From: kbuild test robot <fengguang.wu@...el.com>
To: kbuild@...org
Cc: Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH V7 4/7] LPC: Support the device-tree LPC host on Hip06/Hip07

Hi zhichang.yuan,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.11-rc2 next-20170310]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/zhichang-yuan/LPC-legacy-ISA-I-O-support/20170314-114635
:::::: branch date: 85 minutes ago
:::::: commit date: 85 minutes ago

>> drivers/bus/hisi_lpc.c:465:19-24: ERROR: reference preceded by free on line 460

git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout 4e05ad6c3274fa75c903c7809ef0b51329a31ab2
vim +465 drivers/bus/hisi_lpc.c

4e05ad6c zhichang.yuan 2017-03-13  454  	range->flags = IO_HOST_INDIRECT;
4e05ad6c zhichang.yuan 2017-03-13  455  	range->size = LPC_BUS_IO_SIZE;
4e05ad6c zhichang.yuan 2017-03-13  456  	range->hw_start = LPC_MIN_BUS_RANGE;
4e05ad6c zhichang.yuan 2017-03-13  457
4e05ad6c zhichang.yuan 2017-03-13  458  	tmprange = register_libio_range(range);
4e05ad6c zhichang.yuan 2017-03-13  459  	if (tmprange != range) {
4e05ad6c zhichang.yuan 2017-03-13 @460  		kfree(range);
4e05ad6c zhichang.yuan 2017-03-13  461  		if (IS_ERR(tmprange))
4e05ad6c zhichang.yuan 2017-03-13  462  			return -EFAULT;
4e05ad6c zhichang.yuan 2017-03-13  463  	}
4e05ad6c zhichang.yuan 2017-03-13  464
4e05ad6c zhichang.yuan 2017-03-13 @465  	lpcdev->io_host = range;
4e05ad6c zhichang.yuan 2017-03-13  466
4e05ad6c zhichang.yuan 2017-03-13  467  	return 0;
4e05ad6c zhichang.yuan 2017-03-13  468  }

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