linux-kernel - Re: [PATCH v2 0/5] spi: add support for pre-cooking messages

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Date: Fri, 28 Jun 2024 12:16:05 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Oleksij Rempel <o.rempel@...gutronix.de>
Cc: David Lechner <dlechner@...libre.com>, Mark Brown <broonie@...nel.org>, 
	Martin Sperl <kernel@...tin.sperl.org>, David Jander <david@...tonic.nl>, 
	Jonathan Cameron <jic23@...nel.org>, Michael Hennerich <michael.hennerich@...log.com>, 
	Nuno Sá <nuno.sa@...log.com>, Alain Volmat <alain.volmat@...s.st.com>, 
	Maxime Coquelin <mcoquelin.stm32@...il.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>, 
	linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-stm32@...md-mailman.stormreply.com, linux-arm-kernel@...ts.infradead.org, linux-iio@...r.kernel.org, 
	Julien Stephan <jstephan@...libre.com>, Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
	kernel@...gutronix.de, T.Scherer@...elmann.de
Subject: Re: [PATCH v2 0/5] spi: add support for pre-cooking messages

On 28.06.2024 11:49:38, Oleksij Rempel wrote:
> It seems to be spi_mux specific. We have seen similar trace on other system
> with spi_mux.

Here is the other backtrace from another imx8mp system with a completely
different workload. Both have in common that they use a spi_mux on the
spi-imx driver.

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000dd0
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=0000000046760000
[0000000000000dd0] pgd=0000000000000000, p4d=0000000000000000
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in: can_raw can ti_ads7950 industrialio_triggered_buffer kfifo_buf spi_mux fsl_imx8_ddr_perf at24 flexcan caam can_dev error rtc_snvs imx8mm_thermal spi_imx capture_events_irq cfg80211 iio_trig_hrtimer industrialio_sw_trigger ind>
CPU: 3 PID: 177 Comm: spi5 Not tainted 6.9.0 #1
Hardware name: xxxxxxxxxxxxxxxx (xxxxxxxxx) (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : spi_res_release+0x24/0xb8
lr : spi_async+0xac/0x118
sp : ffff8000823fbcc0
x29: ffff8000823fbcc0 x28: 0000000000000000 x27: 0000000000000000
x26: ffff8000807bef88 x25: ffff80008115c008 x24: 0000000000000000
x23: ffff8000826c3938 x22: 0000000000000000 x21: ffff0000076a9800
x20: 0000000000000000 x19: 0000000000000dc8 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffff88c0e760
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
x11: ffff8000815a1f98 x10: ffff8000823fbb40 x9 : ffff8000807b8420
x8 : ffff800081508000 x7 : 0000000000000004 x6 : 0000000003ce4c66
x5 : 0000000001000000 x4 : 0000000000000000 x3 : 0000000001000000
x2 : 0000000000000000 x1 : ffff8000826c38e0 x0 : ffff0000076a9800
Call trace:
 spi_res_release+0x24/0xb8
 spi_async+0xac/0x118
 spi_mux_transfer_one_message+0xb8/0xf0 [spi_mux]
 __spi_pump_transfer_message+0x260/0x5d8
 __spi_pump_messages+0xdc/0x320
 spi_pump_messages+0x20/0x38
 kthread_worker_fn+0xdc/0x220
 kthread+0x118/0x128
 ret_from_fork+0x10/0x20
Code: a90153f3 a90363f7 91016037 f9403033 (f9400674) 
---[ end trace 0000000000000000 ]---

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde          |
Embedded Linux                   | https://www.pengutronix.de |
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