linux-kernel - Re: [PATCH] usb: host: iounmap before return

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Message-ID: <CAGG-pUStUey3h51k7aeOSp7F3BfzezbXVQOqzHL2+eDK9imW5g@mail.gmail.com>
Date:	Mon, 7 Dec 2015 20:39:58 -0300
From:	"Geyslan G. Bem" <geyslan@...il.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:	Lu Baolu <baolu.lu@...ux.intel.com>,
	Peter Senna Tschudin <peter.senna@...il.com>,
	Mathias Nyman <mathias.nyman@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] usb: host: iounmap before return

2015-12-07 8:37 GMT-03:00 Sergei Shtylyov <sergei.shtylyov@...entembedded.com>:
> 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
>

Look for:
[PATCH v2] usb: host: iounmap before return


-- 
Regards,

Geyslan G. Bem
hackingbits.com
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