Manivannan Sadhasivam bc95dbf550 bus: mhi: core: Fix race while handling SYS_ERR at power up ... commit d651ce8e91 upstream. During SYS_ERR condition, as a response to the MHI_RESET from host, some devices tend to issue BHI interrupt without clearing the SYS_ERR state in the device. This creates a race condition and causes a failure in booting up the device. The issue is seen on the Sierra Wireless EM9191 modem during SYS_ERR handling in mhi_async_power_up(). Once the host detects that the device is in SYS_ERR state, it issues MHI_RESET and waits for the device to process the reset request. During this time, the device triggers the BHI interrupt to the host without clearing SYS_ERR condition. So the host starts handling the SYS_ERR condition again. To fix this issue, let's register the IRQ handler only after handling the SYS_ERR check to avoid getting spurious IRQs from the device. Fixes: e18d4e9fa7 ("bus: mhi: core: Handle syserr during power_up") Cc: stable@vger.kernel.org Reported-by: Aleksander Morgado <aleksander@aleksander.es> Tested-by: Aleksander Morgado <aleksander@aleksander.es> Tested-by: Thomas Perrot <thomas.perrot@bootlin.com> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/20211216081227.237749-8-manivannan.sadhasivam@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-01-27 11:02:58 +01:00
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fsl-mc	Char / Misc driver changes for 5.15-rc1	2021-09-01 08:35:06 -07:00
mhi	bus: mhi: core: Fix race while handling SYS_ERR at power up	2022-01-27 11:02:58 +01:00
arm-cci.c
arm-integrator-lm.c	bus: arm-integrator-lm: Add of_node_put() before return statement	2021-01-15 17:53:05 +01:00
brcmstb_gisb.c	kernel.h: split out panic and oops helpers	2021-07-01 11:06:04 -07:00
bt1-apb.c	bus: bt1-apb: Use sysfs_streq instead of strncmp	2020-05-28 16:56:56 +02:00
bt1-axi.c	bus: bt1-axi: Use sysfs_streq instead of strncmp	2020-05-28 16:57:12 +02:00
da8xx-mstpri.c
hisi_lpc.c
imx-weim.c
intel-ixp4xx-eb.c	bus: ixp4xx: return on error in ixp4xx_exp_probe()	2021-08-12 22:34:13 +02:00
Kconfig	drivers: bus: Delete CONFIG_SIMPLE_PM_BUS	2021-10-05 17:47:22 +02:00
Makefile	drivers: bus: Delete CONFIG_SIMPLE_PM_BUS	2021-10-05 17:47:22 +02:00
mips_cdmm.c	mips: cdmm: fix use-after-free in mips_cdmm_bus_discover	2020-11-27 10:38:02 +01:00
moxtet.c	treewide: change my e-mail address, fix my name	2021-04-09 14:54:23 -07:00
mvebu-mbus.c	ARM: mvebu: avoid clang -Wtautological-constant warning	2021-04-01 16:32:38 +02:00
omap-ocp2scp.c
omap_l3_noc.c	bus: omap_l3_noc: mark l3 irqs as IRQF_NO_THREAD	2021-02-04 09:08:57 +02:00
omap_l3_noc.h
omap_l3_smx.c
omap_l3_smx.h
qcom-ebi2.c	bus: qcom-ebi2: Fix incorrect documentation for '{slow,fast}_cfg'	2021-05-26 21:19:23 -05:00
simple-pm-bus.c	drivers: bus: simple-pm-bus: Add support for probing simple bus only devices	2021-10-05 17:47:15 +02:00
sun50i-de2.c
sunxi-rsb.c	bus: sunxi-rsb: Fix shutdown	2021-12-29 12:28:38 +01:00
tegra-aconnect.c
tegra-gmi.c
ti-pwmss.c
ti-sysc.c	bus: ti-sysc: Fix variable set but not used warning for reinit_modules	2021-12-22 09:32:51 +01:00
ts-nbus.c
uniphier-system-bus.c
vexpress-config.c