Re: USB 2.4.30: fix modem_run

From: Duncan Sands
Date: Fri Feb 11 2005 - 05:19:12 EST


On Thu, 2005-02-10 at 16:11 -0800, Pete Zaitcev wrote:
> I entered a patch which adds "exclusive_access" lock into 2.4.29, to fix
> devices which cannot handle simultaneous accesses. This caused a regression
> with European ADSL modems. An ioctl USBDEVFS_REAPURB allows a process to enter
> the kernel and wait for USB I/O to finish. Naturally, this should not take
> exclusive_access, or nothing will ever finish.

How does this compare with the locking in 2.6 kernels?

Thanks,

Duncan.

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