tree 6f129e982f9f3325162afe0271414833597471e9
parent 472f16f33c7d53515af83c805d4babd8a6c24a19
author Dmitry Kalinkin <dmitry.kalinkin@gmail.com> 1442530904 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1443984657 +0100

vme: change bus error handling scheme

The current VME bus error handler adds errors to the bridge error list.
vme_master_{read,write} then traverses that list to look for relevant
errors.

Such scheme didn't work well for accesses going through vme_master_mmap
because they would also allocate a vme_bus_error, but have no way to do
vme_clear_errors call to free that memory.

This changes the error handling process to be other way around: now
vme_master_{read,write} defines a window in VME address space that will
catch possible errors.  VME bus error interrupt only traverses these
windows and marks those that had errors in them.

Signed-off-by: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Cc: Igor Alekseev <igor.alekseev@itep.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>