On Fri, Apr 23, 2021 at 4:58 AM Otavio Salvador
<otavio.salvador@xxxxxxxxxxxxxxxx> wrote:
>
> Hello all,
>
> We found this error when using Freedreno driver on an i.MX53 device
> with Wayland. Any idea how to fix this?
>
> [ 32.414110] [drm:msm_ioctl_gem_submit] *ERROR* invalid cmdstream size: 0
The invalid cmdstream size is some sort of userspace error
> [ 39.177075]
> [ 39.178617] ======================================================
> [ 39.184804] WARNING: possible circular locking dependency detected
> [ 39.190997] 5.10.31+g7ae1de1d2bd3 #1 Not tainted
> [ 39.195619] ------------------------------------------------------
But possibly it is triggering the lockdep anger? It looks like the
gem locking re-work landed in v5.11.. any chance you can try a newer
kernel?
BR,
-R
> [ 39.201805] kworker/u2:1/68 is trying to acquire lock:
> [ 39.206953] c2b952fc (reservation_ww_class_mutex){+.+.}-{3:3}, at:
> dma_buf_detach+0xd0/0x1e0
> [ 39.215448]
> [ 39.215448] but task is already holding lock:
> [ 39.221286] c2b957b0 (&msm_obj->lock){+.+.}-{3:3}, at:
> msm_gem_free_work+0x118/0x1b0
> [ 39.229062]
> [ 39.229062] which lock already depends on the new lock.
> [ 39.229062]
> [ 39.237243]
> [ 39.237243] the existing dependency chain (in reverse order) is:
> [ 39.244729]
> [ 39.244729] -> #1 (&msm_obj->lock){+.+.}-{3:3}:
> [ 39.250769] mutex_lock_nested+0x1c/0x24
> [ 39.255220] msm_gem_get_and_pin_iova_range+0x38/0x170
> [ 39.260885] msm_gem_get_and_pin_iova+0x24/0x2c
> [ 39.265946] msm_ioctl_gem_submit+0x12c0/0x1964
> [ 39.271008] drm_ioctl+0x1f0/0x3e0
> [ 39.274940] sys_ioctl+0x3bc/0xbe0
> [ 39.278873] ret_fast_syscall+0x0/0x28
> [ 39.283150] 0xbed4deac
> [ 39.286122]
> [ 39.286122] -> #0 (reservation_ww_class_mutex){+.+.}-{3:3}:
> [ 39.293208] lock_acquire+0x134/0x560
> [ 39.297398] __ww_mutex_lock.constprop.0+0xbc/0x1124
> [ 39.302889] ww_mutex_lock+0x68/0xb4
> [ 39.306993] dma_buf_detach+0xd0/0x1e0
> [ 39.311271] drm_prime_gem_destroy+0x2c/0x38
> [ 39.316068] msm_gem_free_work+0xa0/0x1b0
> [ 39.320611] process_one_work+0x2a8/0x7ec
> [ 39.325149] worker_thread+0x4c/0x554
> [ 39.329339] kthread+0x140/0x154
> [ 39.333095] ret_from_fork+0x14/0x20
> [ 39.337196] 0x0
> [ 39.339560]
> [ 39.339560] other info that might help us debug this:
> [ 39.339560]
> [ 39.347568] Possible unsafe locking scenario:
> [ 39.347568]
> [ 39.353491] CPU0 CPU1
> [ 39.358025] ---- ----
> [ 39.362557] lock(&msm_obj->lock);
> [ 39.366061] lock(reservation_ww_class_mutex);
> [ 39.373123] lock(&msm_obj->lock);
> [ 39.379143] lock(reservation_ww_class_mutex);
> [ 39.383689]
> [ 39.383689] *** DEADLOCK ***
> [ 39.383689]
> [ 39.389614] 4 locks held by kworker/u2:1/68:
> [ 39.393888] #0: c24138a8 ((wq_completion)msm){+.+.}-{0:0}, at:
> process_one_work+0x1f4/0x7ec
> [ 39.402362] #1: c26a1f20
> ((work_completion)(&priv->free_work)){+.+.}-{0:0}, at:
> process_one_work+0x1f4/0x7ec
> [ 39.412312] #2: c24188a4 (&dev->struct_mutex){+.+.}-{3:3}, at:
> msm_gem_free_work+0x68/0x1b0
> [ 39.420784] #3: c2b957b0 (&msm_obj->lock){+.+.}-{3:3}, at:
> msm_gem_free_work+0x118/0x1b0
> [ 39.428996]
> [ 39.428996] stack backtrace:
> [ 39.433363] CPU: 0 PID: 68 Comm: kworker/u2:1 Not tainted
> 5.10.31+g7ae1de1d2bd3 #1
> [ 39.440937] Hardware name: Freescale i.MX53 (Device Tree Support)
> [ 39.447044] Workqueue: msm msm_gem_free_work
> [ 39.451346] [<c0111258>] (unwind_backtrace) from [<c010ba00>]
> (show_stack+0x10/0x14)
> [ 39.459107] [<c010ba00>] (show_stack) from [<c0e2b560>]
> (dump_stack+0xdc/0x104)
> [ 39.466430] [<c0e2b560>] (dump_stack) from [<c01838d8>]
> (check_noncircular+0xf0/0x160)
> [ 39.474358] [<c01838d8>] (check_noncircular) from [<c0187060>]
> (__lock_acquire+0x1628/0x2e04)
> [ 39.482893] [<c0187060>] (__lock_acquire) from [<c01892e8>]
> (lock_acquire+0x134/0x560)
> [ 39.490821] [<c01892e8>] (lock_acquire) from [<c0e3da60>]
> (__ww_mutex_lock.constprop.0+0xbc/0x1124)
> [ 39.499877] [<c0e3da60>] (__ww_mutex_lock.constprop.0) from
> [<c0e3ebe4>] (ww_mutex_lock+0x68/0xb4)
> [ 39.508844] [<c0e3ebe4>] (ww_mutex_lock) from [<c080e6a8>]
> (dma_buf_detach+0xd0/0x1e0)
> [ 39.516771] [<c080e6a8>] (dma_buf_detach) from [<c0701d04>]
> (drm_prime_gem_destroy+0x2c/0x38)
> [ 39.525305] [<c0701d04>] (drm_prime_gem_destroy) from [<c077d334>]
> (msm_gem_free_work+0xa0/0x1b0)
> [ 39.534188] [<c077d334>] (msm_gem_free_work) from [<c0147588>]
> (process_one_work+0x2a8/0x7ec)
> [ 39.542725] [<c0147588>] (process_one_work) from [<c0147b18>]
> (worker_thread+0x4c/0x554)
> [ 39.550825] [<c0147b18>] (worker_thread) from [<c014ebb0>]
> (kthread+0x140/0x154)
> [ 39.558229] [<c014ebb0>] (kthread) from [<c0100134>]
> (ret_from_fork+0x14/0x20)
> [ 39.565457] Exception stack(0xc26a1fb0 to 0xc26a1ff8)
> [ 39.570517] 1fa0: 00000000
> 00000000 00000000 00000000
> [ 39.578703] 1fc0: 00000000 00000000 00000000 00000000 00000000
> 00000000 00000000 00000000
> [ 39.586890] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>
> This looks like a regression as it used to run fine on 5.4 Linux kernel.
>
> Any idea of patch reference to test is welcome.
>
> --
> Otavio Salvador O.S. Systems
> http://www.ossystems.com.br http://code.ossystems.com.br
> Mobile: +55 (53) 9 9981-7854 Mobile: +1 (347) 903-9750
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