Commit 944ca05c authored by Nadia Derbey's avatar Nadia Derbey Committed by Linus Torvalds

idr: error checking factorization

Do some code factorization in the return code analysis.
Signed-off-by: default avatarNadia Derbey <Nadia.Derbey@bull.net>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Jim Houston <jim.houston@comcast.net>
Cc: Pierre Peiffer <peifferp@gmail.com>
Acked-by: default avatarRik van Riel <riel@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f098ad65
......@@ -73,6 +73,12 @@ struct idr {
}
#define DEFINE_IDR(name) struct idr name = IDR_INIT(name)
/* Actions to be taken after a call to _idr_sub_alloc */
#define IDR_NEED_TO_GROW -2
#define IDR_NOMORE_SPACE -3
#define _idr_rc_to_errno(rc) ((rc) == -1 ? -EAGAIN : -ENOSPC)
/*
* This is what we export.
*/
......
......@@ -143,7 +143,7 @@ static int sub_alloc(struct idr *idp, int *starting_id, struct idr_layer **pa)
/* if already at the top layer, we need to grow */
if (!(p = pa[l])) {
*starting_id = id;
return -2;
return IDR_NEED_TO_GROW;
}
/* If we need to go up one layer, continue the
......@@ -160,7 +160,7 @@ static int sub_alloc(struct idr *idp, int *starting_id, struct idr_layer **pa)
id = ((id >> sh) ^ n ^ m) << sh;
}
if ((id >= MAX_ID_BIT) || (id < 0))
return -3;
return IDR_NOMORE_SPACE;
if (l == 0)
break;
/*
......@@ -229,7 +229,7 @@ static int idr_get_empty_slot(struct idr *idp, int starting_id,
idp->top = p;
idp->layers = layers;
v = sub_alloc(idp, &id, pa);
if (v == -2)
if (v == IDR_NEED_TO_GROW)
goto build_up;
return(v);
}
......@@ -278,12 +278,8 @@ int idr_get_new_above(struct idr *idp, void *ptr, int starting_id, int *id)
* This is a cheap hack until the IDR code can be fixed to
* return proper error values.
*/
if (rv < 0) {
if (rv == -1)
return -EAGAIN;
else /* Will be -3 */
return -ENOSPC;
}
if (rv < 0)
return _idr_rc_to_errno(rv);
*id = rv;
return 0;
}
......@@ -313,12 +309,8 @@ int idr_get_new(struct idr *idp, void *ptr, int *id)
* This is a cheap hack until the IDR code can be fixed to
* return proper error values.
*/
if (rv < 0) {
if (rv == -1)
return -EAGAIN;
else /* Will be -3 */
return -ENOSPC;
}
if (rv < 0)
return _idr_rc_to_errno(rv);
*id = rv;
return 0;
}
......@@ -696,12 +688,8 @@ int ida_get_new_above(struct ida *ida, int starting_id, int *p_id)
restart:
/* get vacant slot */
t = idr_get_empty_slot(&ida->idr, idr_id, pa);
if (t < 0) {
if (t == -1)
return -EAGAIN;
else /* will be -3 */
return -ENOSPC;
}
if (t < 0)
return _idr_rc_to_errno(t);
if (t * IDA_BITMAP_BITS >= MAX_ID_BIT)
return -ENOSPC;
......
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