qede: fix interrupt coalescing configuration

qede: fix interrupt coalescing configuration

commit 6619a08d4a6facd7c0cbf9c8ad5f9644b2a29ab1 upstream.

On default driver load device gets configured with unexpected
higher interrupt coalescing values instead of default expected
values as memory allocated from krealloc() is not supposed to
be zeroed out and may contain garbage values.

Fix this by allocating the memory of required size first with
kcalloc() and then use krealloc() to resize and preserve the
contents across down/up of the interface.

Signed-off-by: Manish Chopra <manishc@marvell.com>
Fixes: 04643c27703c ("qede: preserve per queue stats across up/down of interface")
Cc: stable@vger.kernel.org
Cc: Bhaskar Upadhaya <bupadhaya@marvell.com>
Cc: David S. Miller <davem@davemloft.net>
Link: https://bugzilla.redhat.com/show_bug.cgi?id=685b01d
Signed-off-by: Alok Prasad <palok@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>