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ARM: rk3308_linux_aarch32[_debug]_defconfig: coherent_pool=4k

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If coherent_pool size is zero, kernel will panic when arm_dma_free.
It seems kernel do not like without atomic_pool, so keep this pool
as small as possible.

Unable to handle kernel NULL pointer dereference at virtual address 00000004
pgd = deb70000
[00000004] *pgd=1e571835, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1] PREEMPT SMP THUMB2
Modules linked in:
CPU: 2 PID: 674 Comm: sh Not tainted 4.4.138 #187
Hardware name: Generic DT based system
task: deb89540 task.stack: df37a000
PC is at addr_in_gen_pool+0x10/0x3c
LR is at addr_in_gen_pool+0xf/0x3c
pc : [<c0154b24>]    lr : [<c0154b23>]    psr: 00000033
sp : df37be80  ip : df37a07c  fp : 000686ec
r10: debc6f48  r9 : 1e406000  r8 : 00000000
r7 : e091d000  r6 : e091d000  r5 : e091efff  r4 : 00000000
r3 : 00000001  r2 : deb89540  r1 : e091d000  r0 : 00000000
[<c0154b24>] (addr_in_gen_pool) from [<c0064a55>] (arch_free_from_atomic_pool+0x19/0x54)
[<c0064a55>] (arch_free_from_atomic_pool) from [<c0064ae3>] (__arm_dma_free+0x53/0xb0)
[<c0064ae3>] (__arm_dma_free) from [<c0064b61>] (arm_dma_free+0xf/0x12)
[<c0064b61>] (arm_dma_free) from [<c017f1a7>] (serial8250_release_dma+0x71/0xd2)
[<c017f1a7>] (serial8250_release_dma) from [<c017dda1>] (serial8250_do_shutdown+0x23/0x98)
[<c017dda1>] (serial8250_do_shutdown) from [<c017ad6b>] (uart_shutdown+0x87/0xba)
[<c017ad6b>] (uart_shutdown) from [<c017b543>] (uart_close+0x8b/0x116)
[<c017b543>] (uart_close) from [<c0174539>] (tty_release+0x20d/0x318)
[<c0174539>] (tty_release) from [<c00db5af>] (__fput+0x8b/0x120)
[<c00db5af>] (__fput) from [<c007b83b>] (task_work_run+0x6b/0x7c)
[<c007b83b>] (task_work_run) from [<c005f551>] (do_work_pending+0x65/0x66)
[<c005f551>] (do_work_pending) from [<c005d301>] (slow_work_pending+0x9/0x18)

Change-Id: If3fc962e4e936132fee021f5e6932cdabfd5ffda
Signed-off-by: Tao Huang <huangtao@rock-chips.com>
This commit is contained in:
Tao Huang
2018-07-26 15:06:26 +08:00
parent cb6cdc8c7d
commit d97bada31e
2 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/configs/rk3308_linux_aarch32_debug_defconfig
View File

@@ -41,7 +41,7 @@ CONFIG_THUMB2_KERNEL=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=32768
CONFIG_UACCESS_WITH_MEMCPY=y
# CONFIG_SWIOTLB is not set
CONFIG_CMDLINE="coherent_pool=0 user_debug=31"
CONFIG_CMDLINE="coherent_pool=4k user_debug=31"
CONFIG_CMDLINE_EXTEND=y
CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_TIMES is not set

2
arch/arm/configs/rk3308_linux_aarch32_defconfig
View File

@@ -41,7 +41,7 @@ CONFIG_THUMB2_KERNEL=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=32768
CONFIG_UACCESS_WITH_MEMCPY=y
# CONFIG_SWIOTLB is not set
CONFIG_CMDLINE="coherent_pool=0 loglevel=0"
CONFIG_CMDLINE="coherent_pool=4k loglevel=0"
CONFIG_CMDLINE_EXTEND=y
CONFIG_CPU_FREQ=y
# CONFIG_CPU_FREQ_TIMES is not set