From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Hannemann Date: Sun, 08 Aug 2010 15:45:26 +0000 Subject: [regression] in linux-next: sh_mobile_ceu_camera broken by "ARM: Message-Id: <4C5ED116.5000002@arndnet.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org Hi Russell, your commit 309caa9cc6ff39d261264ec4ff10e29489afc8f8 ARM: Prohibit ioremap() on kernel managed RAM lets drivers/base/dma-coherent.c::dma_declare_coherent_memory() fail for the sh_mobile_ceu_camera driver (see backtrace below). I think, other configurations (i.MX31 users of the mx3_camera driver: pcm037 and mx31moboard) will have the same problem. Since I have no idea how to fix this, I post this regression report here... [ 49.703125] ------------[ cut here ]------------ [ 49.703125] WARNING: at arch/arm/mm/ioremap.c:207 __arm_ioremap_pfn_caller+0x50/0x18c() [ 49.710937] Modules linked in: sh_mobile_ceu_camera(+) videobuf_dma_contig sh_mobile_csi2 soc_camera videobuf_core v4l2_common videodev v4l1_compat soc_mediabus tmio_mmc [ 49.726562] Backtrace: [ 49.734375] [] (dump_backtrace+0x0/0x110) from [] (dump_stack+0x18/0x1c) [ 49.742187] r6:c025bab7 r5:000000cf r4:00000000 r3:c029eebc [ 49.742187] [] (dump_stack+0x0/0x1c) from [] (warn_slowpath_common+0x54/0x6c) [ 49.750000] [] (warn_slowpath_common+0x0/0x6c) from [] (warn_slowpath_null+0x24/0x2c) [ 49.757812] r8:d09de000 r7:00000000 r6:00000000 r5:0004e000 r4:00800000 [ 49.765625] r3:00000009 [ 49.765625] [] (warn_slowpath_null+0x0/0x2c) from [] (__arm_ioremap_pfn_caller+0x50/0x18c) [ 49.773437] [] (__arm_ioremap_pfn_caller+0x0/0x18c) from [] (__arm_ioremap_caller+0x60/0x68) [ 49.781250] [] (__arm_ioremap_caller+0x0/0x68) from [] (__arm_ioremap+0x14/0x18) [ 49.789062] r5:4e000000 r4:c029d9c0 [ 49.789062] [] (__arm_ioremap+0x0/0x18) from [] (dma_declare_coherent_memory+0x44/0xe8) [ 49.796875] [] (dma_declare_coherent_memory+0x0/0xe8) from [] (sh_mobile_ceu_probe+0x1d4/0x3dc [sh_mobile_ceu_camera]) [ 49.804687] [] (sh_mobile_ceu_probe+0x0/0x3dc [sh_mobile_ceu_camera]) from [] (platform_drv_probe+0x1c/0x20) [ 49.812500] [] (platform_drv_probe+0x0/0x20) from [] (driver_probe_device+0xb0/0x160) [ 49.820312] [] (driver_probe_device+0x0/0x160) from [] (__driver_attach+0x68/0x8c) [ 49.828125] r7:00000000 r6:bf059e60 r5:c029d9f4 r4:c029d9c0 [ 49.835937] [] (__driver_attach+0x0/0x8c) from [] (bus_for_each_dev+0x54/0x84) [ 49.843750] r6:00000000 r5:c0154fd4 r4:bf059e60 r3:00000000 [ 49.843750] [] (bus_for_each_dev+0x0/0x84) from [] (driver_attach+0x20/0x28) [ 49.851562] r6:c02b22b0 r5:cf0be5a0 r4:bf059e60 [ 49.851562] [] (driver_attach+0x0/0x28) from [] (bus_add_driver+0xa8/0x228) [ 49.859375] [] (bus_add_driver+0x0/0x228) from [] (driver_register+0xb0/0x140) [ 49.867187] [] (driver_register+0x0/0x140) from [] (platform_driver_register+0x4c/0x60) [ 49.875000] r8:c0025fe4 r7:00028c36 r6:00000000 r5:00000000 r4:bf05d000 [ 49.882812] r3:00000000 [ 49.882812] [] (platform_driver_register+0x0/0x60) from [] (sh_mobile_ceu_init+0x20/0x2c [sh_mobile_ceu_camera]) [ 49.890625] [] (sh_mobile_ceu_init+0x0/0x2c [sh_mobile_ceu_camera]) from [] (do_one_initcall+0x60/0x1bc) [ 49.898437] [] (do_one_initcall+0x0/0x1bc) from [] (sys_init_module+0x9c/0x1b4) [ 49.906250] r7:00028c36 r6:0001cfc8 r5:00000000 r4:bf059f04 [ 49.914062] [] (sys_init_module+0x0/0x1b4) from [] (ret_fast_syscall+0x0/0x30) [ 49.921875] r7:00000080 r6:00000000 r5:00000000 r4:0001b070 [ 49.929687] ---[ end trace 1b83ab63d709ff41 ]--- [ 49.929687] sh_mobile_ceu sh_mobile_ceu.0: Unable to declare CEU memory. Best regards, Arnd