Yong Wu 383a44aec9 memory: mtk-smi: Fix a null dereference for the ostd ... We add the ostd setting for mt8195. It introduces a KE for the previous SoC which doesn't have ostd setting. This is the log: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000080 ... pc : mtk_smi_larb_config_port_gen2_general+0x64/0x130 lr : mtk_smi_larb_resume+0x54/0x98 ... Call trace: mtk_smi_larb_config_port_gen2_general+0x64/0x130 pm_generic_runtime_resume+0x2c/0x48 __genpd_runtime_resume+0x30/0xa8 genpd_runtime_resume+0x94/0x2c8 __rpm_callback+0x44/0x150 rpm_callback+0x6c/0x78 rpm_resume+0x310/0x558 __pm_runtime_resume+0x3c/0x88 In the code: larbostd = larb->larb_gen->ostd[larb->larbid], if "larb->larb_gen->ostd" is null, the "larbostd" is the offset(e.g. 0x80 above), it's also a valid value, then accessing "larbostd[i]" in the "for" loop will cause the KE above. To avoid this issue, initialize "larbostd" to NULL when the SoC doesn't have ostd setting. Fixes: fe6dd2a401 ("memory: mtk-smi: mt8195: Add initial setting for smi-larb") Signed-off-by: Yong Wu <yong.wu@mediatek.com> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Link: https://lore.kernel.org/r/20211108082429.15080-1-yong.wu@mediatek.com Link: https://lore.kernel.org/r/20211124085042.9649-3-krzysztof.kozlowski@canonical.com' Signed-off-by: Arnd Bergmann <arnd@arndb.de>		2021-11-25 14:46:00 +01:00
..
samsung
tegra
.gitignore
atmel-ebi.c
atmel-sdramc.c
brcmstb_dpfe.c
bt1-l2-ctl.c
da8xx-ddrctl.c
dfl-emif.c
emif-asm-offsets.c
emif.c
emif.h
fsl_ifc.c
fsl-corenet-cf.c
jedec_ddr_data.c
jedec_ddr.h
jz4780-nemc.c
Kconfig
Makefile
mtk-smi.c
mvebu-devbus.c
of_memory.c
of_memory.h
omap-gpmc.c
pl172.c
pl353-smc.c
renesas-rpc-if.c
stm32-fmc2-ebi.c
ti-aemif.c
ti-emif-pm.c
ti-emif-sram-pm.S