Re: 2.4.25 MD RAID 1 driver - syncing hung due to I/O error

One of my disks has a bad block and hung while syncing (as the source of 
the sync) when it was read. A patch is attached for the fix.

The sync_request_done function is called after each sync I/O request 
completes regardless of the error outcome.
See end_sync_write and the "!sum_bhs" case a few lines above the patch 
location for references. If sync_request_done is not called the 
accounting is not updated and sooner or later things will hang. The 
R1BH_Uptodate not set case (read I/O error) does not do this and the 
problem occurs.

mark