Dmitry Torokhov 4097461897 Input: i8042 - break load dependency between atkbd/psmouse and i8042 ... As explained in 1407814240-4275-1-git-send-email-decui@microsoft.com we have a hard load dependency between i8042 and atkbd which prevents keyboard from working on Gen2 Hyper-V VMs. > hyperv_keyboard invokes serio_interrupt(), which needs a valid serio > driver like atkbd.c. atkbd.c depends on libps2.c because it invokes > ps2_command(). libps2.c depends on i8042.c because it invokes > i8042_check_port_owner(). As a result, hyperv_keyboard actually > depends on i8042.c. > > For a Generation 2 Hyper-V VM (meaning no i8042 device emulated), if a > Linux VM (like Arch Linux) happens to configure CONFIG_SERIO_I8042=m > rather than =y, atkbd.ko can't load because i8042.ko can't load(due to > no i8042 device emulated) and finally hyperv_keyboard can't work and > the user can't input: https://bugs.archlinux.org/task/39820 > (Ubuntu/RHEL/SUSE aren't affected since they use CONFIG_SERIO_I8042=y) To break the dependency we move away from using i8042_check_port_owner() and instead allow serio port owner specify a mutex that clients should use to serialize PS/2 command stream. Reported-by: Mark Laws <mdl@60hz.org> Tested-by: Mark Laws <mdl@60hz.org> Cc: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>		2016-07-27 14:20:09 -07:00
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altera_ps2.c
ambakmi.c
ams_delta_serio.c
apbps2.c
arc_ps2.c
at32psif.c
ct82c710.c
gscps2.c
hil_mlc.c
hp_sdc_mlc.c
hp_sdc.c
hyperv-keyboard.c
i8042-io.h
i8042-ip22io.h
i8042-jazzio.h
i8042-ppcio.h
i8042-snirm.h
i8042-sparcio.h
i8042-unicore32io.h
i8042-x86ia64io.h
i8042.c
i8042.h
Kconfig
libps2.c
maceps2.c
Makefile
olpc_apsp.c
parkbd.c
pcips2.c
ps2mult.c
q40kbd.c
rpckbd.c
sa1111ps2.c
serio_raw.c
serio.c
serport.c
sun4i-ps2.c
userio.c
xilinx_ps2.c