linux/drivers/memory
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 memory: samsung: describe drivers in KConfig 2021-09-28 12:38:36 +02:00
tegra Memory controller drivers for v5.16, part two 2021-10-21 21:34:21 +02:00
.gitignore .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
atmel-ebi.c memory: atmel-ebi: add missing of_node_put for loop iteration 2021-05-11 08:49:18 -04:00
atmel-sdramc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 340 2019-06-05 17:37:07 +02:00
brcmstb_dpfe.c memory: brcmstb_dpfe: Simplify with dev_err_probe() 2020-09-02 17:22:31 +02:00
bt1-l2-ctl.c memory: bt1-l2-ctl: Add blank lines after declarations 2020-07-27 11:13:33 +02:00
da8xx-ddrctl.c memory: da8xx-ddrctl: Remove unused 'node' variable 2020-07-24 16:18:32 +02:00
dfl-emif.c memory: dfl-emif: add the DFL EMIF private feature driver 2021-01-07 15:21:27 +01:00
emif-asm-offsets.c memory: emif-asm-offsets: Add GPLv2 SPDX license header 2020-07-24 16:18:32 +02:00
emif.c memory: emif: remove unused frequency and voltage notifiers 2021-06-10 09:24:46 +02:00
emif.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fsl_ifc.c memory: fsl_ifc: fix leak of irq and nand_irq in fsl_ifc_ctrl_probe 2021-10-07 20:39:17 +02:00
fsl-corenet-cf.c memory: fsl-corenet-cf: Remove redundant dev_err call in ccf_probe() 2021-04-01 19:56:52 +02:00
jedec_ddr_data.c memory: Add LPDDR2-info helpers 2021-10-15 09:52:47 +02:00
jedec_ddr.h memory: Add LPDDR2-info helpers 2021-10-15 09:52:47 +02:00
jz4780-nemc.c memory: jz4780_nemc: Fix potential NULL dereference in jz4780_nemc_probe() 2020-12-05 14:57:52 +01:00
Kconfig Merge branch 'for-v5.16/renesas-rpc' into mem-ctrl-next 2021-10-10 19:45:00 +02:00
Makefile memory: dfl-emif: add the DFL EMIF private feature driver 2021-01-07 15:21:27 +01:00
mtk-smi.c memory: mtk-smi: Fix a null dereference for the ostd 2021-11-25 14:46:00 +01:00
mvebu-devbus.c memory: mvebu-devbus: Align with open parenthesis 2020-07-27 11:13:33 +02:00
of_memory.c memory: Add LPDDR2-info helpers 2021-10-15 09:52:47 +02:00
of_memory.h memory: Add LPDDR2-info helpers 2021-10-15 09:52:47 +02:00
omap-gpmc.c memory: omap-gpmc: Drop custom PM calls with cpu_pm notifier 2021-07-29 09:02:27 +02:00
pl172.c amba: Make the remove callback return void 2021-02-02 14:25:50 +01:00
pl353-smc.c Memory controller drivers for v5.14 - PL353 2021-06-12 08:53:06 -07:00
renesas-rpc-if.c memory: renesas-rpc-if: Avoid unaligned bus access for HyperFlash 2021-09-28 12:34:08 +02:00
stm32-fmc2-ebi.c memory: stm32-fmc2-ebi: add missing of_node_put for loop iteration 2021-05-11 08:49:18 -04:00
ti-aemif.c memory: ti-aemif: Drop child node when jumping out loop 2021-01-25 20:18:42 +01:00
ti-emif-pm.c memory: ti-emif-pm: Drop of_match_ptr from of_device_id table 2021-02-08 18:13:24 +01:00
ti-emif-sram-pm.S memory: ti-emif-sram: move driver-specific asm-offset.h to drivers/memory/ 2019-07-17 10:25:10 +09:00