From: Stefan Weinhuber Date: Mon, 7 Dec 2009 11:51:51 +0000 (+0100) Subject: [S390] dasd: improve error recovery for internal I/O X-Git-Tag: v2.6.33-rc1~349^2~34 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eb6e199bef288611157b8198c25d12b32bf058d0;p=pandora-kernel.git [S390] dasd: improve error recovery for internal I/O Most of the error conditions reported by a FICON storage server indicate situations which can be recovered. Sometimes the host just needs to retry an I/O request, but sometimes the recovery is more complex and requires the device driver to wait, choose a different path, etc. The DASD device driver has a fully featured error recovery for normal block layer I/O, but not for internal I/O request which are for example used during the device bring up. This can lead to situations where the IPL of a system fails because DASD devices are not properly recognized. This patch will extend the internal I/O handling to use the existing error recovery procedures. Signed-off-by: Stefan Weinhuber Signed-off-by: Martin Schwidefsky --- Reading git-diff-tree failed