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[SCSI] Convert SCSI mid-layer to scsi_execute_async

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Add scsi helpers to create really-large-requests and convert
scsi-ml to scsi_execute_async().

Per Jens's previous comments, I placed this function in scsi_lib.c.
I made it follow all the queue's limits - I think I did at least :), so
I removed the warning on the function header.

I think the scsi_execute_* functions should eventually take a request_queue
and be placed some place where the dm-multipath hw_handler can use them
if that failover code is going to stay in the kernel. That conversion
patch will be sent in another mail though.

Signed-off-by: Mike Christie <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Mike Christie 2005-11-11 05:30:27 -06:00 • committed by James Bottomley
commit 6e68af666f
6 changed files with 233 additions and 73 deletions
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6
include/scsi/scsi_device.h
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@ -274,6 +274,12 @@ extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
extern int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
int data_direction, void *buffer, unsigned bufflen,
struct scsi_sense_hdr *, int timeout, int retries);
extern int scsi_execute_async(struct scsi_device *sdev,
const unsigned char *cmd, int data_direction,
void *buffer, unsigned bufflen, int use_sg,
int timeout, int retries, void *privdata,
void (*done)(void *, char *, int, int),
gfp_t gfp);
static inline unsigned int sdev_channel(struct scsi_device *sdev)
{