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authorStefan Weinhuber <wein@de.ibm.com>2009-09-22 22:58:52 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-09-22 22:58:46 +0200
commit68d1e5f08b13132504752cad54169376739753db (patch)
tree8182caac93576fdbe0e2e0921bf46b188854863a /arch
parent5314af693da5149c2361d290bb184cf18ee21cdd (diff)
[S390] dasd: tolerate devices that have no feature codes
The DASD device driver reads the feature codes of a device during device initialization. These codes are later used to determine the availability of advanced features like PAV or High Performance FICON. Some very old devices do not support the command to read feature codes and the initialization routine fails. As the feature codes are not necessary for basic DASD operations, we can support such devices by just ignoring missing feature codes. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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