WSL2-Linux-Kernel/drivers/bus
Linus Walleij 7945cbf866 bus: ixp4xx: Don't touch bit 7 on IXP42x
commit ff5a19909b upstream.

We face some regressions on a few IXP42x systems when
accessing flash, the following unrelated error prints
appear from the PCI driver:

ixp4xx-pci c0000000.pci: PCI: abort_handler addr = 0xff9ffb5f,
	   isr = 0x0, status = 0x22a0
ixp4xx-pci c0000000.pci: imprecise abort
(...)

It turns out that while bit 7 is masked "reserved" it is
not unused, so masking it off as zero is dangerous, and
breaks flash access on some systems such as the NSLU2.
Be more careful and avoid masking off any of the reserved
bits 7, 8, 9 or 30. Only keep masking EXP_WORD (bit 2)
on IXP43x which is necessary in some setups.

Fixes: 1c953bda90 ("bus: ixp4xx: Add a driver for IXP4xx expansion bus")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20221122134411.2030372-1-linus.walleij@linaro.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-12-02 17:41:08 +01:00
..
fsl-mc bus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove() 2022-06-22 14:22:04 +02:00
mhi bus: mhi: host: pci_generic: add Telit FN990 2022-07-29 17:25:06 +02:00
Kconfig
Makefile
arm-cci.c
arm-integrator-lm.c
brcmstb_gisb.c
bt1-apb.c
bt1-axi.c
da8xx-mstpri.c
hisi_lpc.c bus: hisi_lpc: fix missing platform_device_put() in hisi_lpc_acpi_probe() 2022-08-17 14:23:10 +02:00
imx-weim.c
intel-ixp4xx-eb.c bus: ixp4xx: Don't touch bit 7 on IXP42x 2022-12-02 17:41:08 +01:00
mips_cdmm.c mips: cdmm: Fix refcount leak in mips_cdmm_phys_base 2022-04-08 14:23:39 +02:00
moxtet.c
mvebu-mbus.c
omap-ocp2scp.c
omap_l3_noc.c
omap_l3_noc.h
omap_l3_smx.c
omap_l3_smx.h
qcom-ebi2.c
simple-pm-bus.c
sun50i-de2.c
sunxi-rsb.c bus: sunxi-rsb: Support atomic transfers 2022-12-02 17:41:03 +01:00
tegra-aconnect.c
tegra-gmi.c
ti-pwmss.c
ti-sysc.c bus: ti-sysc: Fix warnings for unbind for serial 2022-06-14 18:36:09 +02:00
ts-nbus.c
uniphier-system-bus.c
vexpress-config.c