Re: [PATCH 2/3] qed: avoid possible stack overflow in qed_ll2_acquire_connection

[David Miller]

From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Wed, 18 Jan 2017 15:52:52 +0100

> struct qed_ll2_info is rather large, so putting it on the stack
> can cause an overflow, as this warning tries to tell us:
> 
> drivers/net/ethernet/qlogic/qed/qed_ll2.c: In function 'qed_ll2_start':
> drivers/net/ethernet/qlogic/qed/qed_ll2.c:2159:1: error: the frame size of 1056 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
> 
> qed_ll2_start_ooo() already uses a dynamic allocation for the structure
> to work around that problem, and we could do the same in qed_ll2_start()
> as well as qed_roce_ll2_start(), but since the structure is only
> used to pass a couple of initialization values here, it seems nicer
> to replace it with a different structure.
> 
> Lacking any idea for better naming, I'm adding 'struct qed_ll2_conn',
> which now contains all the initialization data, and this now simply
> gets copied into struct qed_ll2_info rather than assigning all members
> one by one.
> 
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Applied.