netdev - Re: [PATCH] net: usb: initialize tmp in dm9601.c to avoid warning

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Date:	Fri, 18 Jan 2013 09:44:40 +0100
From:	Peter Korsgaard <jacmet@...site.dk>
To:	David Miller <davem@...emloft.net>
Cc:	sque@...omium.org, netdev@...r.kernel.org, msb@...omium.org
Subject: Re: [PATCH] net: usb: initialize tmp in dm9601.c to avoid warning

>>>>> "David" == David Miller <davem@...emloft.net> writes:

 >> Sure, I just wondered as the code hasn't changed in 5+ years, and the
 >> function that gets called is defined just above, so the compiler should
 >> be able to figure it out.

 David> Nothing guarentees that a piece of memory passed into an external
 David> function has it's contents initialized completely by that function.

 David> The compiler can't see what usbnet_read_cmd() does with the memory
 David> behind the 'data' pointer argument.  So it makes the only assumption
 David> it can make, which is that 'tmp' might be uninitialized.

True, I had forgotten about the usbnet_read_cmd() change (which is the
change causing the warning). With that:

Acked-by: Peter Korsgaard <jacmet@...site.dk>

-- 
Bye, Peter Korsgaard
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