linux-kernel - Re: [PATCH next] PCI: brmstb: Fix type mismatch for num_inbound_wins in brcm_pcie

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Message-ID: <20240904181055.GA20073@rocinante>
Date: Thu, 5 Sep 2024 03:10:55 +0900
From: Krzysztof Wilczyński <kw@...ux.com>
To: florian.fainelli@...adcom.com
Cc: Riyan Dhiman <riyandhiman14@...il.com>, jim2101024@...il.com,
	nsaenz@...nel.org, lorian.fainelli@...adcom.com,
	bcm-kernel-feedback-list@...adcom.com, bhelgaas@...gle.com,
	linux-pci@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH next] PCI: brmstb: Fix type mismatch for num_inbound_wins
 in brcm_pcie_setup()

Hello,

> > Change num_inbound_wins from u8 to int in brcm_pcie_setup() function to correctly
> > handle potential negative error codes returned by brcm_pcie_get_inbound_wins().
> > The u8 type was inappropriate for capturing the function's return value,
> > which can include error codes.
[...]
> This looks fine, however it seems like we could either:
> 
> - update brcm_pcie_get_inbound_wins() to take a reference to an u8 and
> assign num_inbound_wins directly plus return a negative error code
> 
> or
> 
> - update brcm_pcie_get_inbound_wins() to return 0 when encountering an error
> 
> We should have at least 1 inbound window to operate this PCIe controller, so
> if we get 0, nothing useful is going to happen.
> 
> Deferring to Jim as to whether he prefers to take your patch or fix it in a
> different way. Thanks!

The former would be my preference.

As such, I can make the change on the branch directly, if needed.  To avoid
reposting or sending a new patch.

	Krzysztof