libata: avoid global response buffer in atapi_qc_complete
authorChristoph Hellwig <hch@lst.de>
Tue, 10 Jan 2017 08:41:43 +0000 (09:41 +0100)
committerTejun Heo <tj@kernel.org>
Tue, 10 Jan 2017 15:55:38 +0000 (10:55 -0500)
commitaa18da8b7ec57f6ff255634746aed6266a01b315
tree1c193773476d8d410c8caca5ee239562074661ad
parentfb1b8b117531f217e7d332bdc5cbdf8ebb077ea5
libata: avoid global response buffer in atapi_qc_complete

We only need to look at 4 bytes of the inquiry response for ATAPI
devices.  Instead of using the global ata_scsi_rbuf just use a
a stack buffer.  Also factor the fixup into it's own little helper
function to make it more readable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
drivers/ata/libata-scsi.c