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Message-ID: <56656F74.1020909@cogentembedded.com>
Date: Mon, 7 Dec 2015 14:37:24 +0300
From: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To: Lu Baolu <baolu.lu@...ux.intel.com>,
"Geyslan G. Bem" <geyslan@...il.com>, peter.senna@...il.com
Cc: Mathias Nyman <mathias.nyman@...el.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: host: iounmap before return
Hello.
On 12/07/2015 12:30 PM, Lu Baolu wrote:
>> This patch fixes a 'quirk_usb_handoff_xhci()' branch return that was not unmapping correctly.
>>
>> Coccinelle: scripts/coccinelle/free/iounmap.cocci
>>
>> Signed-off-by: Geyslan G. Bem <geyslan@...il.com>
>> ---
>> drivers/usb/host/pci-quirks.c | 3 ++-
>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
>> index f940056..64150dd 100644
>> --- a/drivers/usb/host/pci-quirks.c
>> +++ b/drivers/usb/host/pci-quirks.c
>> @@ -990,7 +990,7 @@ static void quirk_usb_handoff_xhci(struct pci_dev *pdev)
>> /* We're reading garbage from the controller */
>> dev_warn(&pdev->dev,
>> "xHCI controller failing to respond");
>> - return;
>> + goto out;
>
> If "out" is only used here, why not iounmap and return directly here?
Why repeat the code? Nah, bad idea.
>> }
>>
>> if (!ext_cap_offset)
>> @@ -1062,6 +1062,7 @@ hc_init:
>> XHCI_MAX_HALT_USEC, val);
>> }
>>
>> +out:
>> iounmap(base);
>> }
>>
MBR, Sergei
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