Hi Federico, Recent patch from you (commit id a8f3c203e19b702fa5e8e83a9b6fb3c5a6d1cce4) which added cached buffer support to videobuf dma contig, is causing my driver to crash. Has this patch being tested for 'uncached' buffers ? If I replace this mapping logic with remap_pfn_range() my driver works without any crash. Or is that I am missing somewhere ? ------ Thx, --Prabhakar Following is the crash log: Unable to handle kernel paging request at virtual address e1a0201a pgd = c372c000 [e1a0201a] *pgd=00000000 Internal error: Oops: 1 [#1] PREEMPT ARM Modules linked in: CPU: 0 Not tainted (3.5.0-rc3+ #32) PC is at flush_dcache_page+0x4c/0x1b8 LR is at insert_page+0x38/0x158 pc : [<c000f028>] lr : [<c0075b58>] psr: a0000013 sp : c36d5d90 ip : c36d5dd8 fp : c36d5dd4 r10: c5000000 r9 : 00000000 r8 : 00281000 r7 : 00000103 r6 : c2d60780 r5 : e1a02006 r4 : c056f000 r3 : 00000000 r2 : e1a02006 r1 : b6bb8000 r0 : c056f000 Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 0005317f Table: c372c000 DAC: 00000015 Process vpif_display (pid: 1167, stack limit = 0xc36d4270) Stack: (0xc36d5d90 to 0xc36d6000) 5d80: 00000000 00000000 c36d5de4 c36d5da8 5da0: c0019da8 c00194d0 c04b1fc0 0000000d c056f000 b6bb8000 c2d60780 00000103 5dc0: 00281000 c5000000 c36d5e04 c36d5dd8 c0075b58 c000efec c36d5e04 c36d5de8 5de0: c033c164 c2c349a0 c365e264 c364a20c c37abd60 00281000 c36d5e14 c36d5e08 5e00: c0075cd8 c0075b30 c36d5e4c c36d5e18 c0248ca0 c0075c88 00000003 b6bb8000 5e20: 00000000 c364a20c c2c349a0 c365ed80 c2d60780 b6bb8000 00000281 c37a6688 5e40: c36d5e64 c36d5e50 c0246608 c0248b58 c2c349a0 c364a000 c36d5e7c c36d5e68 5e60: c0250364 c0246548 c3611a00 c2c349a0 c36d5e9c c36d5e80 c0235c90 c0250334 5e80: c035c608 c2c349a0 000000ff c365ed80 c36d5f04 c36d5ea0 c007ab78 c0235c2c 5ea0: 000000ff 00000000 c365ed80 00000000 00000000 c365ed80 00000001 00281000 5ec0: b6e39000 00000000 00000007 c374bcd4 c374bcdc c374b8f0 c36d5f04 c365ed80 5ee0: 000000ff 00281000 00000007 00000001 00000000 c2d60780 c36d5f44 c36d5f08 5f00: c007b034 c007a950 000000ff 00000000 c365ed80 00000281 c36d5f34 c2d607b4 5f20: c365ed80 00000003 00280400 00000000 c36d4000 00000000 c36d5f74 c36d5f48 5f40: c006efd0 c007adbc 00000001 00000000 c36d5f74 c365ed80 00000001 00000003 5f60: 00280400 00000000 c36d5fa4 c36d5f78 c0079364 c006ef7c 00000001 00000000 5f80: 00001000 00000003 00000000 00008598 000000c0 c00095a4 00000000 c36d5fa8 5fa0: c0009420 c00792f8 00000003 00000000 00000000 00280400 00000003 00000001 5fc0: 00000003 00000000 00008598 000000c0 00000000 00000000 b6f9c000 bef89c94 5fe0: 00000000 bef89b58 00008b54 b6ef8908 40000010 00000000 00000000 00000000 Backtrace: [<c000efdc>] (flush_dcache_page+0x0/0x1b8) from [<c0075b58>] (insert_page+0x38/0x158) [<c0075b20>] (insert_page+0x0/0x158) from [<c0075cd8>] (vm_insert_page+0x60/0x6c) r8:00281000 r7:c37abd60 r6:c364a20c r5:c365e264 r4:c2c349a0 [<c0075c78>] (vm_insert_page+0x0/0x6c) from [<c0248ca0>] (__videobuf_mmap_mapper+0x158/0x1f4) [<c0248b48>] (__videobuf_mmap_mapper+0x0/0x1f4) from [<c0246608>] (videobuf_mmap_mapper+0xd0/0x114) [<c0246538>] (videobuf_mmap_mapper+0x0/0x114) from [<c0250364>] (vpif_mmap+0x40/0x50) r5:c364a000 r4:c2c349a0 [<c0250324>] (vpif_mmap+0x0/0x50) from [<c0235c90>] (v4l2_mmap+0x74/0x98) r5:c2c349a0 r4:c3611a00 [<c0235c1c>] (v4l2_mmap+0x0/0x98) from [<c007ab78>] (mmap_region+0x238/0x46c) r6:c365ed80 r5:000000ff r4:c2c349a0 r3:c035c608 [<c007a940>] (mmap_region+0x0/0x46c) from [<c007b034>] (do_mmap_pgoff+0x288/0x2e8) [<c007adac>] (do_mmap_pgoff+0x0/0x2e8) from [<c006efd0>] (vm_mmap_pgoff+0x64/0x7c) [<c006ef6c>] (vm_mmap_pgoff+0x0/0x7c) from [<c0079364>] (sys_mmap_pgoff+0x7c/0x9c) r8:00000000 r7:00280400 r6:00000003 r5:00000001 r4:c365ed80 [<c00792e8>] (sys_mmap_pgoff+0x0/0x9c) from [<c0009420>] (ret_fast_syscall+0x0/0x2c) r8:c00095a4 r7:000000c0 r6:00008598 r5:00000000 r4:00000003 Code: 11a05003 1a000008 e3550000 0a000006 (e5953014) ---[ end trace 57f3e388e320b7e4 ]-- -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
