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[108.223.40.66]) by smtp.gmail.com with ESMTPSA id m7-v6sm5928204pgr.62.2018.08.23.13.08.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 23 Aug 2018 13:08:35 -0700 (PDT) Date: Thu, 23 Aug 2018 13:08:34 -0700 From: Guenter Roeck To: Mark Brown , Kirill Kapranov Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: -next: Traceback at at drivers/spi/spi.c:2179 spi_register_controller Message-ID: <20180823200834.GA9368@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I see the attached warning when booting 'sabrelite' images in qemu, using imx_v6_v7_defconfig and imx6dl-sabrelite.dts. Context suggests that the warning is seen since commit 1a4327fbf4554 ("spi: fix IDR collision on systems with both fixed and dynamic SPI bus numbers"). Guenter --- [ 7.105230] ------------[ cut here ]------------ [ 7.105509] WARNING: CPU: 0 PID: 1 at drivers/spi/spi.c:2179 spi_register_controller+0x7dc/0x938 [ 7.105760] couldn't get idr [ 7.105849] Modules linked in: [ 7.106363] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.18.0-next-20180822 #1 [ 7.106593] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) [ 7.106869] Backtrace: [ 7.107126] [] (dump_backtrace) from [] (show_stack+0x18/0x1c) [ 7.107426] r7:00000000 r6:60000013 r5:00000000 r4:c11cee68 [ 7.107641] [] (show_stack) from [] (dump_stack+0xb4/0xec) [ 7.107845] [] (dump_stack) from [] (__warn+0xe8/0x114) [ 7.108048] r10:ffffffe4 r9:00000883 r8:c06d1f60 r7:00000009 r6:c0eda848 r5:00000000 [ 7.108254] r4:c6097cac r3:2f537163 [ 7.108395] [] (__warn) from [] (warn_slowpath_fmt+0x4c/0x6c) [ 7.108596] r9:c61a8010 r8:c66f5590 r7:cbdc031c r6:00000001 r5:c0edab28 r4:c1108908 [ 7.108802] [] (warn_slowpath_fmt) from [] (spi_register_controller+0x7dc/0x938) [ 7.109020] r3:2f537163 r2:c0edab28 [ 7.109150] r5:c62fe268 r4:c62fe000 [ 7.109291] [] (spi_register_controller) from [] (spi_bitbang_start+0xa8/0x12c) [ 7.109517] r10:c62fe268 r9:c66f54c0 r8:c61a8010 r7:00000000 r6:c61a8000 r5:c62fe4e8 [ 7.109710] r4:c62fe000 [ 7.109836] [] (spi_bitbang_start) from [] (spi_imx_probe+0x3fc/0x694) [ 7.110044] r5:c62fe000 r4:c62fe4e8 [ 7.110189] [] (spi_imx_probe) from [] (platform_drv_probe+0x50/0xa0) [ 7.110405] r10:00000000 r9:00000000 r8:c1180380 r7:00000000 r6:c1180380 r5:00000000 [ 7.110600] r4:c61a8010 [ 7.110725] [] (platform_drv_probe) from [] (really_probe+0x1d4/0x2c8) [ 7.110935] r7:00000000 r6:c1946d58 r5:c1946d54 r4:c61a8010 [ 7.111109] [] (really_probe) from [] (driver_probe_device+0x64/0x170) [ 7.111325] r10:ffffe000 r9:c11d5cb0 r8:c11d6de0 r7:c1108908 r6:c61a8044 r5:c1180380 [ 7.111523] r4:c61a8010 r3:00000000 [ 7.111663] [] (driver_probe_device) from [] (__driver_attach+0xe0/0xe4) [ 7.111880] r9:c11d5cb0 r8:c11d6de0 r7:c1108908 r6:c61a8044 r5:c1180380 r4:c61a8010 [ 7.112086] [] (__driver_attach) from [] (bus_for_each_dev+0x78/0xbc) [ 7.112307] r7:c1108908 r6:c060be18 r5:c1180380 r4:00000000 [ 7.112481] [] (bus_for_each_dev) from [] (driver_attach+0x20/0x28) [ 7.112685] r7:00000000 r6:c11747e8 r5:c66f3300 r4:c1180380 [ 7.112856] [] (driver_attach) from [] (bus_add_driver+0x17c/0x210) [ 7.113067] [] (bus_add_driver) from [] (driver_register+0x7c/0x110) [ 7.113277] r7:c105fc4c r6:00000000 r5:c1108908 r4:c1180380 [ 7.113451] [] (driver_register) from [] (__platform_driver_register+0x34/0x48) [ 7.113670] r5:c1108908 r4:c1108930 [ 7.113815] [] (__platform_driver_register) from [] (spi_imx_driver_init+0x18/0x20) [ 7.114063] [] (spi_imx_driver_init) from [] (do_one_initcall+0x88/0x318) [ 7.114299] [] (do_one_initcall) from [] (kernel_init_freeable+0x2f8/0x3d8) [ 7.114530] r10:ffffe000 r9:c1108930 r8:c1092850 r7:c11d6de0 r6:00000007 r5:c11dbc40 [ 7.114731] r4:c10aa244 [ 7.114863] [] (kernel_init_freeable) from [] (kernel_init+0x10/0x11c) [ 7.115086] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c0b7e140 [ 7.115282] r4:00000000 [ 7.115411] [] (kernel_init) from [] (ret_from_fork+0x14/0x20) [ 7.115647] Exception stack(0xc6097fb0 to 0xc6097ff8) [ 7.115962] 7fa0: 00000000 00000000 00000000 00000000 [ 7.116339] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 7.116665] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 7.116906] r5:c0b7e140 r4:00000000 [ 7.117632] irq event stamp: 195919 [ 7.117930] hardirqs last enabled at (195927): [] console_unlock+0x1bc/0x5e0 [ 7.118211] hardirqs last disabled at (195934): [] console_unlock+0x80/0x5e0 [ 7.118472] softirqs last enabled at (195918): [] __do_softirq+0x350/0x510 [ 7.118703] softirqs last disabled at (195903): [] irq_exit+0x100/0x1b0 [ 7.118996] ---[ end trace c06b605fd79953be ]--- [ 7.119974] spi_imx 2008000.ecspi: probed