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The malloc() calls are unnecessary, just allocate the stuff on stack. While at it, reorder the code a little, so that only one variable is used for the text, use snprintf() instead of sprintf() and use %01d as a formatting string to avoid any possible overflows. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Igor Grinberg <grinberg@compulab.co.il> Cc: Nikita Kiryanov <nikita@compulab.co.il> Cc: Sean Cross <xobs@kosagi.com> Cc: Simon Glass <sjg@chromium.org> Cc: Stefano Babic <sbabic@denx.de> Cc: Tim Harvey <tharvey@gateworks.com> Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>