From: "Gustavo A. R. Silva" <gustavo@xxxxxxxxxxxxxx> Subject: rapidio/mport_cdev: mark expected switch fall-through In preparation for enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warning: drivers/rapidio/devices/rio_mport_cdev.c: In function `mport_release_mapping': drivers/rapidio/devices/rio_mport_cdev.c:2151:3: warning: this statement may fall through [-Wimplicit-fallthrough=] rio_unmap_inb_region(mport, map->phys_addr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ CC drivers/regulator/fixed-helper.o CC drivers/pinctrl/stm32/pinctrl-stm32f429.o drivers/rapidio/devices/rio_mport_cdev.c:2152:2: note: here case MAP_DMA: ^~~~ Warning level 3 was used: -Wimplicit-fallthrough=3 This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough. Link: http://lkml.kernel.org/r/20190212175014.GA14326@embeddedor Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx> Acked-by: Alexandre Bounine <alex.bou9@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- --- a/drivers/rapidio/devices/rio_mport_cdev.c~rapidio-mport_cdev-mark-expected-switch-fall-through +++ a/drivers/rapidio/devices/rio_mport_cdev.c @@ -2149,6 +2149,7 @@ static void mport_release_mapping(struct switch (map->dir) { case MAP_INBOUND: rio_unmap_inb_region(mport, map->phys_addr); + /* fall through */ case MAP_DMA: dma_free_coherent(mport->dev.parent, map->size, map->virt_addr, map->phys_addr); _
