From: Joe Perches <joe@perches.com>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
Ralf Baechle <ralf@linux-mips.org>,
Paul Burton <paul.burton@mips.com>,
James Hogan <jhogan@kernel.org>,
Florian Fainelli <f.fainelli@gmail.com>,
bcm-kernel-feedback-list@broadcom.com
Cc: linux-mips@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] MIPS: BCM63XX: Mark expected switch fall-through
Date: Mon, 05 Aug 2019 12:15:01 -0700 [thread overview]
Message-ID: <0f56d1fe577707e7804386592e1a5579bfd3abbf.camel@perches.com> (raw)
In-Reply-To: <20190805185533.GA10551@embeddedor>
On Mon, 2019-08-05 at 13:55 -0500, Gustavo A. R. Silva wrote:
> Mark switch cases where we are expecting to fall through.
>
> This patch fixes the following warning (Building: bcm63xx_defconfig mips):
>
> arch/mips/pci/ops-bcm63xx.c: In function ‘bcm63xx_pcie_can_access’:
> arch/mips/pci/ops-bcm63xx.c:474:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> if (PCI_SLOT(devfn) == 0)
> ^
> arch/mips/pci/ops-bcm63xx.c:477:2: note: here
> default:
> ^~~~~~~
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
> arch/mips/pci/ops-bcm63xx.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/mips/pci/ops-bcm63xx.c b/arch/mips/pci/ops-bcm63xx.c
> index d02eb9d16b55..925c72348fb6 100644
> --- a/arch/mips/pci/ops-bcm63xx.c
> +++ b/arch/mips/pci/ops-bcm63xx.c
> @@ -474,6 +474,7 @@ static int bcm63xx_pcie_can_access(struct pci_bus *bus, int devfn)
> if (PCI_SLOT(devfn) == 0)
> return bcm_pcie_readl(PCIE_DLSTATUS_REG)
> & DLSTATUS_PHYLINKUP;
> + /* else, fall through */
> default:
> return false;
> }
Perhaps clearer as:
---
arch/mips/pci/ops-bcm63xx.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/arch/mips/pci/ops-bcm63xx.c b/arch/mips/pci/ops-bcm63xx.c
index d02eb9d16b55..a5e4b1905958 100644
--- a/arch/mips/pci/ops-bcm63xx.c
+++ b/arch/mips/pci/ops-bcm63xx.c
@@ -471,12 +471,11 @@ static int bcm63xx_pcie_can_access(struct pci_bus *bus, int devfn)
case PCIE_BUS_BRIDGE:
return PCI_SLOT(devfn) == 0;
case PCIE_BUS_DEVICE:
- if (PCI_SLOT(devfn) == 0)
- return bcm_pcie_readl(PCIE_DLSTATUS_REG)
- & DLSTATUS_PHYLINKUP;
- default:
- return false;
+ return PCI_SLOT(devfn) == 0 &&
+ bcm_pcie_readl(PCIE_DLSTATUS_REG) & DLSTATUS_PHYLINKUP;
}
+
+ return false;
}
static int bcm63xx_pcie_read(struct pci_bus *bus, unsigned int devfn,
next prev parent reply other threads:[~2019-08-05 19:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-05 18:55 [PATCH] MIPS: BCM63XX: Mark expected switch fall-through Gustavo A. R. Silva
2019-08-05 19:15 ` Joe Perches [this message]
2019-08-06 19:22 ` Paul Burton
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