Re: pci-exynos.c coverity issue #1437287

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On Tue, Oct 27, 2020 at 05:40:42PM +0100, Krzysztof Kozlowski wrote:
> On Tue, Oct 27, 2020 at 11:34:46AM -0500, Bjorn Helgaas wrote:
> > Hi Jingoo,
> > 
> > Please take a look at this issue reported by Coverity:
> > 
> > 222 static void exynos_pcie_assert_reset(struct exynos_pcie *ep)
> > 223 {
> > 224        struct dw_pcie *pci = ep->pci;
> > 225        struct device *dev = pci->dev;
> > 226
> >    	1. Condition ep->reset_gpio >= 0, taking true branch.
> > 227        if (ep->reset_gpio >= 0)
> > 
> > CID 1437287 (#1 of 1): Unchecked return value (CHECKED_RETURN) 2.
> > check_return: Calling devm_gpio_request_one without checking return
> > value (as is done elsewhere 112 out of 113 times).
> > 
> > 228                devm_gpio_request_one(dev, ep->reset_gpio,
> > 229                                GPIOF_OUT_INIT_HIGH, "RESET");
> > 
> > 
> > Maybe you can guarantee that it's safe to ignore the return value by
> > doing a lot of code analysis, but I think it would be better to check
> > like all the other callers do.
> 
> +Cc Marek,
> 
> Hi Bjorn,
> 
> I think this is being removed by Marek's patchset:
> https://lore.kernel.org/linux-samsung-soc/20201023075744.26200-1-m.szyprowski@xxxxxxxxxxx/

Perfect, thanks!



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