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authorAllen Hubbe <Allen.Hubbe@emc.com>2016-03-21 04:53:13 -0400
committerJon Mason <jdmason@kudzu.us>2016-03-21 19:30:06 -0400
commitafc54992296a5e7f7d2e41456ed90789b01a4e7b (patch)
tree1169ae9df2c86aee7d76cf5ff625c1840b944b17 /include/linux/ntb.h
parent838850ee0bb97fc60ca8f1de3bf12ed0854f6173 (diff)
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NTB: Make _addr functions optional in the API
The functions ntb_peer_db_addr and ntb_peer_spad_addr were required by the api. The functions already support returning an error, so any existing calling code should already check for it. Any existing code using drivers that implement the functions will not be affected. Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'include/linux/ntb.h')
-rw-r--r--include/linux/ntb.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/include/linux/ntb.h b/include/linux/ntb.h
index f798e2afba88..6f47562d477b 100644
--- a/include/linux/ntb.h
+++ b/include/linux/ntb.h
@@ -284,7 +284,7 @@ static inline int ntb_dev_ops_is_valid(const struct ntb_dev_ops *ops)
/* ops->db_read_mask && */
ops->db_set_mask &&
ops->db_clear_mask &&
- ops->peer_db_addr &&
+ /* ops->peer_db_addr && */
/* ops->peer_db_read && */
ops->peer_db_set &&
/* ops->peer_db_clear && */
@@ -295,7 +295,7 @@ static inline int ntb_dev_ops_is_valid(const struct ntb_dev_ops *ops)
ops->spad_count &&
ops->spad_read &&
ops->spad_write &&
- ops->peer_spad_addr &&
+ /* ops->peer_spad_addr && */
/* ops->peer_spad_read && */
ops->peer_spad_write &&
1;
@@ -757,6 +757,9 @@ static inline int ntb_peer_db_addr(struct ntb_dev *ntb,
phys_addr_t *db_addr,
resource_size_t *db_size)
{
+ if (!ntb->ops->peer_db_addr)
+ return -EINVAL;
+
return ntb->ops->peer_db_addr(ntb, db_addr, db_size);
}
@@ -948,6 +951,9 @@ static inline int ntb_spad_write(struct ntb_dev *ntb, int idx, u32 val)
static inline int ntb_peer_spad_addr(struct ntb_dev *ntb, int idx,
phys_addr_t *spad_addr)
{
+ if (!ntb->ops->peer_spad_addr)
+ return -EINVAL;
+
return ntb->ops->peer_spad_addr(ntb, idx, spad_addr);
}