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authorJens Axboe <jens.axboe@oracle.com>2008-10-24 09:22:42 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-24 08:22:38 -0700
commite013e13bf605b9e6b702adffbe2853cfc60e7806 (patch)
treef69ce0b35fa8df2447d06eee64f4f579b883e701 /init
parent57f8f7b60db6f1ed2c6918ab9230c4623a9dbe37 (diff)
libata: fix bug with non-ncq devices
The recent commit 2fca5ccf97d2c28bcfce44f5b07d85e74e3cd18e ("libata: switch to using block layer tagging support") to enable support for block layer tagging in libata was broken for non-NCQ devices The block layer initializes the tag field to -1 to detect invalid uses of a tag, and if the libata devices does NOT support NCQ, we just used that field to index the internal command list. So we need to check for -1 first and only use the tag field if it's valid. Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Reported-by: Alexander Beregalov <a.beregalov@gmail.com> Tested-by: Paul Mundt <lethal@linux-sh.org> Tested-by: Dave Young <hidave.darkstar@gmail.com> Tested-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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