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Message-ID: <54F87075.5020105@hurleysoftware.com>
Date: Thu, 05 Mar 2015 10:04:21 -0500
From: Peter Hurley <peter@...leysoftware.com>
To: Maxime Ripard <maxime.ripard@...e-electrons.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Vinod Koul <vinod.koul@...el.com>
CC: Linux kernel <linux-kernel@...r.kernel.org>
Subject: [4.0-rc+] WARNING: CPU: 0 PID: 1 at ./drivers/dma/dmaengine.c:863
dma_async_device_register+0xe0/0x540()
First boot of 4.0-rc+ gave me [1] on a Beaglebone Black due to
commit ecc19d17868be9c9f8f00ed928791533c420f3e0
Author: Maxime Ripard <maxime.ripard@...e-electrons.com>
Date: Mon Nov 17 14:42:53 2014 +0100
dmaengine: Add a warning for drivers not using the generic slave caps retrieval
For the slave caps retrieval to be really useful, most drivers need to
implement it.
Hence, we need to be slightly more aggressive, and trigger a warning at
registration time for drivers that don't fill their caps infos in order to
encourage them to implement it.
Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
Acked-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Vinod Koul <vinod.koul@...el.com>
Regards,
Peter Hurley
[1]
[ 1.848374] WARNING: CPU: 0 PID: 1 at /home/peter/src/kernels/mainline/drivers/dma/dmaengine.c:863 dma_async_device_register+0xe0/0x540()
[ 1.860798] this driver doesn't support generic slave capabilities reporting
[ 1.867893] Modules linked in:
[ 1.870993] CPU: 0 PID: 1 Comm: swapper Not tainted 4.0.0-rc2+ #115
[ 1.877302] Hardware name: Generic AM33XX (Flattened Device Tree)
[ 1.883478] [<c00164b8>] (unwind_backtrace) from [<c00135e8>] (show_stack+0x20/0x24)
[ 1.891307] [<c00135e8>] (show_stack) from [<c091f7a0>] (dump_stack+0x24/0x28)
[ 1.898602] [<c091f7a0>] (dump_stack) from [<c003dff4>] (warn_slowpath_common+0x94/0xc0)
[ 1.906753] [<c003dff4>] (warn_slowpath_common) from [<c003e060>] (warn_slowpath_fmt+0x40/0x48)
[ 1.915515] [<c003e060>] (warn_slowpath_fmt) from [<c0561fd8>] (dma_async_device_register+0xe0/0x540)
[ 1.924806] [<c0561fd8>] (dma_async_device_register) from [<c056b3cc>] (cppi41_dma_probe+0x470/0x4c0)
[ 1.934397] [<c056b3cc>] (cppi41_dma_probe) from [<c05f7e6c>] (platform_drv_probe+0x54/0xb4)
[ 1.942924] [<c05f7e6c>] (platform_drv_probe) from [<c05f5bac>] (driver_probe_device+0x14c/0x3a8)
[ 1.951861] [<c05f5bac>] (driver_probe_device) from [<c05f5e58>] (__device_attach+0x50/0x54)
[ 1.960360] [<c05f5e58>] (__device_attach) from [<c05f3c94>] (bus_for_each_drv+0x68/0x9c)
[ 1.968596] [<c05f3c94>] (bus_for_each_drv) from [<c05f59ec>] (device_attach+0x84/0x98)
[ 1.976656] [<c05f59ec>] (device_attach) from [<c05f4e70>] (bus_probe_device+0x94/0xb8)
[ 1.984717] [<c05f4e70>] (bus_probe_device) from [<c05f2cb0>] (device_add+0x3dc/0x59c)
[ 1.992700] [<c05f2cb0>] (device_add) from [<c07a6f5c>] (of_device_add+0x44/0x4c)
[ 2.000242] [<c07a6f5c>] (of_device_add) from [<c07a78d4>] (of_platform_device_create_pdata+0x140/0x234)
[ 2.009788] [<c07a78d4>] (of_platform_device_create_pdata) from [<c07a7af8>] (of_platform_bus_create+0x10c/0x234)
[ 2.020118] [<c07a7af8>] (of_platform_bus_create) from [<c07a7dbc>] (of_platform_populate+0x6c/0xc8)
[ 2.029319] [<c07a7dbc>] (of_platform_populate) from [<c06e83f8>] (am335x_child_probe+0x38/0x54)
[ 2.038168] [<c06e83f8>] (am335x_child_probe) from [<c05f7e6c>] (platform_drv_probe+0x54/0xb4)
[ 2.046840] [<c05f7e6c>] (platform_drv_probe) from [<c05f5bac>] (driver_probe_device+0x14c/0x3a8)
[ 2.055774] [<c05f5bac>] (driver_probe_device) from [<c05f5ef8>] (__driver_attach+0x9c/0xa0)
[ 2.064268] [<c05f5ef8>] (__driver_attach) from [<c05f3bcc>] (bus_for_each_dev+0x70/0xa4)
[ 2.072501] [<c05f3bcc>] (bus_for_each_dev) from [<c05f555c>] (driver_attach+0x2c/0x30)
[ 2.080561] [<c05f555c>] (driver_attach) from [<c05f515c>] (bus_add_driver+0x170/0x22c)
[ 2.088623] [<c05f515c>] (bus_add_driver) from [<c05f6878>] (driver_register+0x88/0x108)
[ 2.096770] [<c05f6878>] (driver_register) from [<c05f7d98>] (__platform_driver_register+0x64/0x6c)
[ 2.105884] [<c05f7d98>] (__platform_driver_register) from [<c0d8df0c>] (am335x_child_init+0x1c/0x20)
[ 2.115171] [<c0d8df0c>] (am335x_child_init) from [<c0008ad8>] (do_one_initcall+0xe8/0x230)
[ 2.123592] [<c0008ad8>] (do_one_initcall) from [<c0d45f90>] (kernel_init_freeable+0x1e0/0x284)
[ 2.132355] [<c0d45f90>] (kernel_init_freeable) from [<c0919044>] (kernel_init+0x1c/0x100)
[ 2.140681] [<c0919044>] (kernel_init) from [<c000f8d0>] (ret_from_fork+0x14/0x24)
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