Re: Oops: mounting floppy disk on PPC64 (power3)
From: Nathan Lynch <hidden>
Date: 2006-03-31 22:50:53
Hello. Markus Rothe wrote:
quoted hunk
this is kernel 2.6.16.1 compiled with gcc 4.1.0 (gentoo patches). I never tried to mount a floppy on this system before, so I don't know if it Oops'ed in previous kernel versions, too. power3 ~ # uname -a Linux power3 2.6.16.1 #1 Fri Mar 31 21:08:43 UTC 2006 ppc64 POWER3 (630+) CHRP IBM,7044-170 GNU/Linux power3 ~ # modprobe floppy power3 ~ # mount /mnt/floppy/ Oops: Kernel access of bad area, sig: 11 [#1] NUMA PSERIES Modules linked in: floppy NIP: C0000000000201E8 LR: D0000000000C43A4 CTR: C0000000000201D8 REGS: c0000000003df470 TRAP: 0300 Not tainted (2.6.16.1) MSR: A000000000001032 <ME,IR,DR> CR: 48000082 XER: 00000000 DAR: 0000000000000178, DSISR: 0000000040000000 TASK = c0000000003fc9b0[0] 'swapper' THREAD: c0000000003dc000 GPR00: C00000000042FC08 C0000000003DF6F0 C0000000004D3310 0000000000000000 GPR04: C00000000161D000 0000000000000400 0000000000000002 0000000000000750 GPR08: 0000000000000064 D0000000000D4AE0 D0000000000D5F20 C0000000000201D8 GPR12: D0000000000CB280 C0000000003FCF80 0000000000000000 0000000000000000 GPR16: 0000000000000000 0000000000000000 4000000001400000 C0000000003595E0 GPR20: C0000000003D1F28 00000000017D1A80 C0000000003D1A80 0000000000000060 GPR24: 00000000000003F0 A000000000009032 0000000000000044 00000000000000D9 GPR28: 0000000000000400 0000000000000002 D0000000000DB880 C00000000161D000 NIP [C0000000000201E8] .dma_map_single+0x10/0x70 LR [D0000000000C43A4] .setup_rw_floppy+0x2c0/0xaa8 [floppy] Call Trace: [C0000000003DF6F0] [D0000000000C5790] .start_motor+0x108/0x158 [floppy] (unreli) [C0000000003DF760] [D0000000000C43A4] .setup_rw_floppy+0x2c0/0xaa8 [floppy] [C0000000003DF810] [C000000000044714] .run_timer_softirq+0x174/0x20c [C0000000003DF8B0] [C00000000003FC68] .__do_softirq+0x80/0x128 [C0000000003DF940] [C00000000003FD5C] .do_softirq+0x4c/0x68 [C0000000003DF9C0] [C00000000001C9E8] .timer_interrupt+0x360/0x388 [C0000000003DFA90] [C0000000000034B8] decrementer_common+0xb8/0x100--- Exception: 901 at .ppc64_runlatch_off+0x0/0x50 LR = .default_idle+0x48/0x70[C0000000003DFD80] [C000000000016764] .default_idle+0x68/0x70 (unreliable) [C0000000003DFE00] [C0000000000166E8] .cpu_idle+0x40/0x54 [C0000000003DFE70] [C0000000000092B0] .rest_init+0x3c/0x54 [C0000000003DFEF0] [C0000000003B16D4] .start_kernel+0x1f0/0x208 [C0000000003DFF90] [C000000000008514] .start_here_common+0x88/0x174 Instruction dump: 4e800421 e8410028 48000008 0fe00000 38210070 e8010010 7c0803a6 4e800020 7c0802a6 f8010010 f821ff91 e80298d0 <e9230178> 7fa90000 409e000c e92298d8 Am I doing something wrong?
Nope.
I believe this was fixed in Linus' tree as of a couple days ago:
diff-tree b239cbe957ae730caa8af2f169a4d35b8c1bb299 (from
69ed3324983bb937d78a857Author: Stephen Rothwell [off-list ref]
Date: Tue Mar 28 14:40:58 2006 +1100
[PATCH] powerpc: make ISA floppies work again
We used to assume that a DMA mapping request with a NULL dev was
for
ISA DMA. This assumption was broken at some point. Now we
explicitly
pass the detected ISA PCI device in the floppy setup.
Signed-off-by: Stephen Rothwell [off-list ref]
Signed-off-by: Paul Mackerras [off-list ref]
Maybe you could verify with latest -git, or 2.6.17-rc1 when it's
released?