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libata: add support for ATA_16 on ATAPI

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Add support for issuing ATA_16 passthru commands to ATAPI devices
managed by libata.  It requires the previous CDB length fix patch.

A boot/module parameter, "atapi_passthru16=0" can be used to globally
disable this feature, if ever desired.

tj: restructured __ata_scsi_queuecmd() according to Jeff's suggestion.

Signed-off-by: Mark Lord <liml@rtr.ca>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Mark Lord
2007-08-08 01:08:45 +09:00
committed by Jeff Garzik
parent 4cc980b34b
commit baf4fdfaaf
3 changed files with 41 additions and 16 deletions
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drivers/ata/libata.h
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@@ -56,6 +56,7 @@ extern unsigned int ata_print_id;
extern struct workqueue_struct *ata_aux_wq;
extern int atapi_enabled;
extern int atapi_dmadir;
extern int atapi_passthru16;
extern int libata_fua;
extern int libata_noacpi;
extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);