Messages in this thread | | | Subject | Re: [REGRESSION] "USB: use kfifo to buffer usb-generic serial writes" causes gobi_loader to hang | From | Marcel Holtmann <> | Date | Sun, 17 Jan 2010 00:13:33 -0800 |
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Hi Matthew,
> gobi_loader writes firmware to gobi USB devices (qcserial) via the USB > serial layer by writing it a megabyte at a time (matching the Windows > driver behaviour). Commit 8e8dce065088833fc418bfa5fbf035cb0726c04c > breaks it - strace shows the write simply hanging. ssyrq-t says the > backtrace is: > > Jan 17 15:37:37 localhost kernel: Call Trace: > Jan 17 15:37:37 localhost kernel: [<ffffffff8128986c>] n_tty_write+0x2da/0x351 > Jan 17 15:37:37 localhost kernel: [<ffffffff810464b4>] ? default_wake_function+0x0/0x14 > Jan 17 15:37:37 localhost kernel: [<ffffffff81286969>] tty_write+0x19d/0x245 > Jan 17 15:37:37 localhost kernel: [<ffffffff81289592>] ? n_tty_write+0x0/0x351 > Jan 17 15:37:37 localhost kernel: [<ffffffff81103e44>] vfs_write+0xae/0x10b > Jan 17 15:37:37 localhost kernel: [<ffffffff81103f61>] sys_write+0x4a/0x6e > Jan 17 15:37:37 localhost kernel: [<ffffffff81009e45>] tracesys+0xd9/0xde > > The commit before this works fine.
maybe I should have finished my libusb version of the gobi_loader ;)
Regards
Marcel
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