The driver performs a number of checks on the virtual/physical addresses which
would always evaluate as true (except ide_dma_sgiioc4() -- always false):
- for sgiioc4_init_hwif_ports(), its caller, sgiioc4_ide_setup_pci_device(),
guarantees that 'ctrl_port' and 'irq_port' parameters are never 0;
- in sgiioc4_read_status(), we always read the IDE status register, so there's
no need to check the register's address (must be a leftover from the times
when this function implemented the INB() method);
- in ide_dma_sgiioc4(), 'dma_base' can never be 0 as IOC4_DMA_OFFSET is not 0.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: jeremy@sgi.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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