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hpsa: get rid of type/attribute/direction bit field where possible

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Using bit fields for hardware command fields isn't portable and
relies on assumptions about how the compiler lays out the bits.
We can fix this in the driver's internal command structure, but the
ioctl interface we can't change because it is part of the
userland ABI.

Signed-off-by: Don Brace <don.brace@pmcs.com>
Reviewed-by: Webb Scales <webb.scales@hp.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Stephen M. Cameron
2014-11-14 17:27:04 -06:00
committed by Christoph Hellwig
parent 50a0decf75
commit a505b86fde
2 changed files with 42 additions and 34 deletions
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drivers/scsi/hpsa_cmd.h
+13 -5
View File
@@ -320,11 +320,19 @@ struct CommandListHeader {
struct RequestBlock {
u8 CDBLen;
struct {
u8 Type:3;
u8 Attribute:3;
u8 Direction:2;
} Type;
/*
* type_attr_dir:
* type: low 3 bits
* attr: middle 3 bits
* dir: high 2 bits
*/
u8 type_attr_dir;
#define TYPE_ATTR_DIR(t, a, d) ((((d) & 0x03) << 6) |\
(((a) & 0x07) << 3) |\
((t) & 0x07))
#define GET_TYPE(tad) ((tad) & 0x07)
#define GET_ATTR(tad) (((tad) >> 3) & 0x07)
#define GET_DIR(tad) (((tad) >> 6) & 0x03)
u16 Timeout;
u8 CDB[16];
};