Fill the struct uart_port->mapsize field and use it, insteaf of hardcoded values in many places. This makes the code layout a bit more consistent and easily allows using generic helpers for the io memory handling. Candidates for such helpers could be eg. the request+ioremap and iounmap+release combinations. Signed-off-by: Enrico Weigelt <info@xxxxxxxxx> --- drivers/tty/serial/zs.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/zs.c b/drivers/tty/serial/zs.c index adbfe79..ab432ba 100644 --- a/drivers/tty/serial/zs.c +++ b/drivers/tty/serial/zs.c @@ -986,14 +986,14 @@ static void zs_release_port(struct uart_port *uport) { iounmap(uport->membase); uport->membase = 0; - release_mem_region(uport->mapbase, ZS_CHAN_IO_SIZE); + release_mem_region(uport->mapbase, uport->mapsize); } static int zs_map_port(struct uart_port *uport) { if (!uport->membase) uport->membase = ioremap_nocache(uport->mapbase, - ZS_CHAN_IO_SIZE); + uport->mapsize); if (!uport->membase) { dev_err(port->dev, "zs: Cannot map MMIO\n"); return -ENOMEM; @@ -1005,13 +1005,13 @@ static int zs_request_port(struct uart_port *uport) { int ret; - if (!request_mem_region(uport->mapbase, ZS_CHAN_IO_SIZE, "scc")) { + if (!request_mem_region(uport->mapbase, uport->mapsize, "scc")) { dev_err(uport->dev, "zs: Unable to reserve MMIO resource\n"); return -EBUSY; } ret = zs_map_port(uport); if (ret) { - release_mem_region(uport->mapbase, ZS_CHAN_IO_SIZE); + release_mem_region(uport->mapbase, uport->mapsize); return ret; } return 0; @@ -1113,6 +1113,7 @@ static int __init zs_probe_sccs(void) uport->flags = UPF_BOOT_AUTOCONF; uport->ops = &zs_ops; uport->line = chip * ZS_NUM_CHAN + side; + uport->mapsize = ZS_CHAN_IO_SIZE; uport->mapbase = dec_kn_slot_base + zs_parms.scc[chip] + (side ^ ZS_CHAN_B) * ZS_CHAN_IO_SIZE; -- 1.9.1