From: Mark Brown <broonie@kernel.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: shawn.lin@rock-chips.com, lorenzo.pieralisi@arm.com,
andrew.murray@arm.com, bhelgaas@google.com, heiko@sntech.de,
lgirdwood@gmail.com, linux-pci@vger.kernel.org,
linux-rockchip@lists.infradead.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/2] PCI: rockchip: Simplify optional regulator handling
Date: Mon, 18 Nov 2019 11:59:30 +0000 [thread overview]
Message-ID: <20191118115930.GC9761@sirena.org.uk> (raw)
In-Reply-To: <347bc3ef8399577e4cef3fdbf3af34d20b4ad27e.1573908530.git.robin.murphy@arm.com>
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On Sat, Nov 16, 2019 at 12:54:20PM +0000, Robin Murphy wrote:
> Null checks are both cheaper and more readable than having !IS_ERR()
> splattered everywhere.
> - if (IS_ERR(rockchip->vpcie3v3))
> + if (!rockchip->vpcie3v3)
> return;
>
> /*
> @@ -611,6 +611,7 @@ static int rockchip_pcie_parse_host_dt(struct rockchip_pcie *rockchip)
> if (PTR_ERR(rockchip->vpcie12v) != -ENODEV)
> return PTR_ERR(rockchip->vpcie12v);
> dev_info(dev, "no vpcie12v regulator found\n");
> + rockchip->vpcie12v = NULL;
According to the API NULL is a valid regulator. We don't currently
actually do this but it's storing up surprises if you treat it as
invalid.
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next prev parent reply other threads:[~2019-11-18 11:59 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-16 12:54 [PATCH 1/2] PCI: rockchip: Make some regulators non-optional Robin Murphy
2019-11-16 12:54 ` [PATCH 2/2] PCI: rockchip: Simplify optional regulator handling Robin Murphy
2019-11-18 11:59 ` Mark Brown [this message]
2019-11-18 12:20 ` Robin Murphy
2019-11-18 12:39 ` Andrew Murray
2019-11-18 13:10 ` Robin Murphy
2019-11-18 13:17 ` Andrew Murray
2019-11-18 14:24 ` Bjorn Helgaas
2019-11-18 18:15 ` Lorenzo Pieralisi
2019-11-18 18:38 ` Mark Brown
2019-11-18 11:57 ` [PATCH 1/2] PCI: rockchip: Make some regulators non-optional Mark Brown
2019-11-18 12:28 ` Andrew Murray
2019-11-20 17:05 ` Lorenzo Pieralisi
2020-11-07 11:36 ` Qu Wenruo
2020-11-07 11:57 ` Qu Wenruo
2020-11-07 12:47 ` Robin Murphy
2020-11-07 12:54 ` Qu Wenruo
2020-11-07 13:30 ` Qu Wenruo
2020-11-09 12:00 ` Robin Murphy
2020-11-09 12:38 ` Qu Wenruo
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