Frederic Barrat 6124ed1a71 cxl: Fix driver use count ... commit 197267d035 upstream. cxl keeps a driver use count, which is used with the hash memory model on p8 to know when to upgrade local TLBIs to global and to trigger callbacks to manage the MMU for PSL8. If a process opens a context and closes without attaching or fails the attachment, the driver use count is never decremented. As a consequence, TLB invalidations remain global, even if there are no active cxl contexts. We should increment the driver use count when the process is attaching to the cxl adapter, and not on open. It's not needed before the adapter starts using the context and the use count is decremented on the detach path, so it makes more sense. It affects only the user api. The kernel api is already doing The Right Thing. Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Fixes: 7bb5d91a4d ("cxl: Rework context lifetimes") Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> [ajd: backport to stable v4.4 tree] Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-10-05 09:41:47 +02:00
..
altera-stapl
c2port	drivers/misc/c2port/c2port-duramar2150.c: checking for NULL instead of IS_ERR()	2017-06-26 07:13:10 +02:00
cb710
cxl	cxl: Fix driver use count	2017-10-05 09:41:47 +02:00
echo
eeprom	- New Device Support	2015-11-06 10:23:50 -08:00
genwqe	GenWQE: Fix bad page access during abort of resource allocation	2016-11-10 16:36:33 +01:00
ibmasm
lis3lv02d
mei	mei: me: add lewisburg device ids	2017-08-30 10:19:22 +02:00
mic	misc: mic/scif: fix wrap around tests	2016-05-04 14:48:51 -07:00
sgi-gru
sgi-xp
ti-st
vmw_vmci
ad525x_dpot-i2c.c
ad525x_dpot-spi.c
ad525x_dpot.c	drivers/misc/ad525x_dpot: AD5274 fix RDAC read back errors	2016-05-04 14:48:52 -07:00
ad525x_dpot.h
apds990x.c
apds9802als.c
arm-charlcd.c
atmel_tclib.c
atmel-ssc.c
bh1770glc.c
bh1780gli.c
bmp085-i2c.c
bmp085-spi.c
bmp085.c
bmp085.h
cs5535-mfgpt.c
ds1682.c
dummy-irq.c
enclosure.c	scsi: ses: do not add a device to an enclosure if enclosure_add_links() fails.	2017-07-27 15:06:04 -07:00
fsa9480.c
hmc6352.c
hpilo.c
hpilo.h
ics932s401.c
ioc4.c
isl29003.c
isl29020.c
Kconfig	misc/bmp085: Enable building as a module	2016-05-04 14:48:51 -07:00
kgdbts.c
lattice-ecp3-config.c
lkdtm.c
Makefile
pch_phub.c
phantom.c
pti.c
qcom-coincell.c
spear13xx_pcie_gadget.c
sram.c
ti_dac7512.c
tifm_7xx1.c
tifm_core.c
tsl2550.c
vexpress-syscfg.c
vmw_balloon.c	mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM	2015-11-06 17:50:42 -08:00