For bus-based driver, device removal is implemented as: device_remove() => bus->remove() => driver->remove()

Driver core needs no feedback from bus driver about the result of remove callback. In which case, commit fc7a6209d571 ("bus: Make remove callback return void") forces bus_type::remove be void-returned.

Now we have the situation that both 1st & 2nd part of calling chain are void returned, so it does not make much sense for the last one (driver->remove) to return non-void to its caller.

So the basic idea behind this patchset is making remove() callback of any bus-based driver to be void returned.

This patchset includes changes for drivers below: 1. hyperv 2. macio 3. apr 4. xen 5. ac87 6. soundbus

Q: Why not platform drivers? A: Too many of them.(maybe 4K+)

Dawei Li (6): hyperv: Make remove callback of hyperv driver void returned macio: Make remove callback of macio driver void returned apr: make remove callback of apr driver void returned xen: make remove callback of xen driver void returned ac97: make remove callback of ac97 driver void returned soundbus: make remove callback of soundbus driver void returned

arch/powerpc/include/asm/macio.h | 12 ++++++------ drivers/ata/pata_macio.c | 4 +--- drivers/block/xen-blkback/xenbus.c | 4 +--- drivers/block/xen-blkfront.c | 3 +-- drivers/char/tpm/xen-tpmfront.c | 3 +-- drivers/gpu/drm/hyperv/hyperv_drm_drv.c | 4 +--- drivers/gpu/drm/xen/xen_drm_front.c | 3 +-- drivers/hid/hid-hyperv.c | 4 +--- drivers/hv/hv_balloon.c | 5 +---- drivers/hv/hv_util.c | 4 +--- drivers/input/misc/xen-kbdfront.c | 5 ++--- drivers/input/serio/hyperv-keyboard.c | 4 +--- drivers/macintosh/rack-meter.c | 4 +--- drivers/mfd/wm97xx-core.c | 4 +--- drivers/net/ethernet/apple/bmac.c | 4 +--- drivers/net/ethernet/apple/mace.c | 4 +--- drivers/net/hyperv/netvsc_drv.c | 4 +--- drivers/net/wireless/intersil/orinoco/airport.c | 4 +--- drivers/net/xen-netback/xenbus.c | 3 +-- drivers/net/xen-netfront.c | 4 +--- drivers/pci/controller/pci-hyperv.c | 3 +-- drivers/pci/xen-pcifront.c | 4 +--- drivers/scsi/mac53c94.c | 5 +---- drivers/scsi/mesh.c | 5 +---- drivers/scsi/storvsc_drv.c | 4 +--- drivers/scsi/xen-scsifront.c | 4 +--- drivers/tty/hvc/hvc_xen.c | 4 ++-- drivers/tty/serial/pmac_zilog.c | 7 ++----- drivers/uio/uio_hv_generic.c | 5 ++--- drivers/usb/host/xen-hcd.c | 4 +--- drivers/video/fbdev/hyperv_fb.c | 5 +---- drivers/video/fbdev/xen-fbfront.c | 6 ++---- drivers/xen/pvcalls-back.c | 3 +-- drivers/xen/pvcalls-front.c | 3 +-- drivers/xen/xen-pciback/xenbus.c | 4 +--- drivers/xen/xen-scsiback.c | 4 +--- include/linux/hyperv.h | 2 +- include/linux/soc/qcom/apr.h | 2 +- include/sound/ac97/codec.h | 6 +++--- include/xen/xenbus.h | 2 +- net/9p/trans_xen.c | 3 +-- net/vmw_vsock/hyperv_transport.c | 4 +--- sound/ac97/bus.c | 5 ++--- sound/aoa/fabrics/layout.c | 3 +-- sound/aoa/soundbus/i2sbus/core.c | 4 +--- sound/aoa/soundbus/soundbus.h | 6 +++--- sound/soc/qcom/qdsp6/q6core.c | 4 +--- sound/xen/xen_snd_front.c | 3 +-- 48 files changed, 63 insertions(+), 137 deletions(-)