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| /openbmc/linux/drivers/gpu/drm/msm/ |
| H A D | msm_gem.c | 16eb51ab Mon Apr 17 17:55:04 CDT 2023 Rob Clark <robdclark@chromium.org> drm/msm: Fix vmap madv warning
Commit d6ae7d1cd58e ("drm/msm/gem: Simplify vmap vs LRU tracking")
introduced a splat in the pin_pages_locked() path for buffers that
had been MADV_DONTNEED.
------------[ cut here ]------------
msm_obj->madv != 0
WARNING: CPU: 1 PID: 144 at drivers/gpu/drm/msm/msm_gem.c:230 msm_gem_pin_pages_locked+0x9c/0xd4
Modules linked in: lzo_rle cros_ec_lid_angle cros_ec_sensors cros_ec_sensors_core venus_dec venus_enc videobuf2_dma_contig cdc_ether usbnet mii uvcvideo videobuf2_vmalloc hci_uart btqca qcom_spmi_adc5 uvc qcom_spmi_temp_alarm qcom_vadc_common cros_ec_sensorhub videobuf2_memops cros_ec_typec sx9324 sx_common typec joydev bluetooth industrialio_triggered_buffer ecdh_generic kfifo_buf ecc venus_core qcom_stats v4l2_mem2mem videobuf2_v4l2 videobuf2_common ath11k_ahb ath11k mac80211 cfg80211 fuse zram zsmalloc
CPU: 1 PID: 144 Comm: ring0 Tainted: G W 6.3.0-rc2-debug+ #622
Hardware name: Google Villager (rev1+) with LTE (DT)
pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : msm_gem_pin_pages_locked+0x9c/0xd4
lr : msm_gem_pin_pages_locked+0x9c/0xd4
sp : ffffffc009ffbab0
x29: ffffffc009ffbab0 x28: ffffffee8da75008 x27: ffffff80a10274d0
x26: ffffff8087fe3bf8 x25: ffffff8087fe3c08 x24: 0000000000000001
x23: ffffff80891d5800 x22: ffffff809d0de480 x21: ffffff8081e5a080
x20: 0000000000000002 x19: ffffff80a3564c00 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 00000000000a9620
x14: 0000000000000000 x13: 2d2d2d2d2d2d2d2d x12: 2d2d2d2d5d206572
x11: 656820747563205b x10: 2d2d2d2d2d2d2d2d x9 : ffffffee8c705dfc
x8 : ffffffee8da75000 x7 : ffffffee8d34e6d0 x6 : 0000000000000000
x5 : 00000000000affa8 x4 : 000000000000000d x3 : ffffffee8da75008
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffffff8088048040
Call trace:
msm_gem_pin_pages_locked+0x9c/0xd4
get_vaddr+0xb0/0x150
msm_gem_get_vaddr_active+0x1c/0x28
snapshot_buf+0x90/0x10c
msm_rd_dump_submit+0x30c/0x380
msm_gpu_submit+0x88/0x174
msm_job_run+0x68/0x118
drm_sched_main+0x2b8/0x3a0
kthread+0xf0/0x100
ret_from_fork+0x10/0x20
irq event stamp: 3358
hardirqs last enabled at (3357): [<ffffffee8c7051f4>] __up_console_sem+0x7c/0x80
hardirqs last disabled at (3358): [<ffffffee8d3480b0>] el1_dbg+0x24/0x80
softirqs last enabled at (3330): [<ffffffee8c610420>] __do_softirq+0x21c/0x4bc
softirqs last disabled at (3325): [<ffffffee8c616708>] ____do_softirq+0x18/0x24
---[ end trace 0000000000000000 ]---
But, as with msm_gem_get_vaddr_active(), this is a special case
because we know that the buffer won't be purged evicted until it's
fence is signaled. We just forgot to propagate the logic get_vaddr()
to pin_pages_locked().
Fixes: d6ae7d1cd58e ("drm/msm/gem: Simplify vmap vs LRU tracking")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/532616/
Link: https://lore.kernel.org/r/20230417225504.494934-1-robdclark@gmail.com
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