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9ff61ab28df1a0d20e1819d387094d220c1580ad
netdev_tx_err() may be called with a null I/O buffer (e.g. to record a transmit error with no associated buffer). Avoid a potential null pointer dereference in the DMA unmapping code path. Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE README File Quick start guide: cd src make For any more detailed instructions, see http://ipxe.org
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