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spi: mt65xx: make sure operations completed before unloading
author
Daniel Golle
<daniel@makrotopia.org>
Mon, 1 May 2023 18:33:14 +0000
(19:33 +0100)
committer
Mark Brown
<broonie@kernel.org>
Tue, 23 May 2023 22:19:55 +0000
(23:19 +0100)
When unloading the spi-mt65xx kernel module during an ongoing spi-mem
operation the kernel will Oops shortly after unloading the module.
This is because wait_for_completion_timeout was still running and
returning into the no longer loaded module:
Internal error: Oops:
0000000096000005
[#1] SMP
Modules linked in: [many, but spi-mt65xx is no longer there]
CPU: 0 PID: 2578 Comm: block Tainted: G W O 6.3.0-next-
20230428
+ #0
Hardware name: Bananapi BPI-R3 (DT)
pstate:
804000c5
(Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lock_acquire+0x18c/0x20e8
lr : __lock_acquire+0x9b8/0x20e8
sp :
ffffffc009ec3400
x29:
ffffffc009ec3400
x28:
0000000000000001
x27:
0000000000000004
x26:
ffffff80082888c8
x25:
0000000000000000
x24:
0000000000000000
x23:
ffffffc009609da8
x22:
ffffff8008288000
x21:
ffffff8008288968
x20:
00000000000003c2
x19:
ffffff8008be7990
x18:
00000000000002af
x17:
0000000000000000
x16:
0000000000000000
x15:
ffffffc008d78970
x14:
000000000000080d
x13:
00000000000002af
x12:
00000000ffffffea
x11:
00000000ffffefff
x10:
ffffffc008dd0970
x9 :
ffffffc008d78918
x8 :
0000000000017fe8
x7 :
0000000000000001
x6 :
0000000000000000
x5 :
ffffff807fb53910
x4 :
0000000000000000
x3 :
0000000000000027
x2 :
0000000000000027
x1 :
0000000000000000
x0 :
00000000000c03c2
Call trace:
__lock_acquire+0x18c/0x20e8
lock_acquire+0x100/0x2a4
_raw_spin_lock_irq+0x58/0x74
__wait_for_common+0xe0/0x1b4
wait_for_completion_timeout+0x1c/0x24
0xffffffc000acc8a4 <--- used to be mtk_spi_transfer_wait
spi_mem_exec_op+0x390/0x3ec
spi_mem_no_dirmap_read+0x6c/0x88
spi_mem_dirmap_read+0xcc/0x12c
spinand_read_page+0xf8/0x1dc
spinand_mtd_read+0x1b4/0x2fc
mtd_read_oob_std+0x58/0x7c
mtd_read_oob+0x8c/0x148
mtd_read+0x50/0x6c
...
Prevent this by completing in mtk_spi_remove if needed.
Fixes:
9f763fd20da7
("spi: mediatek: add spi memory support for ipm design")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link:
https://lore.kernel.org/r/ZFAF6pJxMu1z6k4w@makrotopia.org
Signed-off-by: Mark Brown <broonie@kernel.org>
drivers/spi/spi-mt65xx.c
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diff --git
a/drivers/spi/spi-mt65xx.c
b/drivers/spi/spi-mt65xx.c
index 21c321f437667495c5a3ed94b3d73bf483672ffa..d7432e2219d850685d3ad83a5f8a60b3f7266dde 100644
(file)
--- a/
drivers/spi/spi-mt65xx.c
+++ b/
drivers/spi/spi-mt65xx.c
@@
-1275,6
+1275,9
@@
static int mtk_spi_remove(struct platform_device *pdev)
struct mtk_spi *mdata = spi_master_get_devdata(master);
int ret;
+ if (mdata->use_spimem && !completion_done(&mdata->spimem_done))
+ complete(&mdata->spimem_done);
+
ret = pm_runtime_resume_and_get(&pdev->dev);
if (ret < 0)
return ret;