[U-Boot] [PATCH] usb: storage: Fix overwritten in usb_stor_set_max_xfer_blk()

[Bin Meng]

Hi Marek,

On Thu, Sep 28, 2017 at 11:24 PM, Marek Vasut <marex at denx.de> wrote:
> On 09/28/2017 06:50 AM, Bin Meng wrote:
>> The stored 'blk' value is overwritten to 'size / 512' before it can
>> be used in usb_stor_set_max_xfer_blk(). This is not what we want.
>> In fact, when 'size' exceeds the upper limit (USHRT_MAX * 512), we
>> should simply assign 'size' to the upper limit.
>>
>> Reported-by: Coverity (CID: 167250)
>> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
>
> Still failing
> https://travis-ci.org/marex/u-boot-usb/builds/280835848
>

This fixes the Coverity issue, not the 'make tests' issue. Please hold
on apply the xHCI patchset and when the fix is ready I will send v2.

>> ---
>>
>>  common/usb_storage.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/common/usb_storage.c b/common/usb_storage.c
>> index a57570b..a91b1c0 100644
>> --- a/common/usb_storage.c
>> +++ b/common/usb_storage.c
>> @@ -964,7 +964,7 @@ static void usb_stor_set_max_xfer_blk(struct usb_device *udev,
>>               blk = 20;
>>       } else {
>>               if (size > USHRT_MAX * 512)
>> -                     blk = USHRT_MAX;
>> +                     size = USHRT_MAX * 512;
>>               blk = size / 512;
>>       }
>>  #endif
>>

Regards,
Bin