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IB/core: Fix error code for invalid GID entry 

When a GID entry is invalid EAGAIN is returned. This is an incorrect error
code, there is nothing that will make this GID entry valid again in
bounded time.

Some user space tools fail incorrectly if EAGAIN is returned here, and
this represents a small ABI change from earlier kernels.

The first patch in the Fixes list makes entries that were valid before
to become invalid, allowing this code to trigger, while the second patch
in the Fixes list introduced the wrong EAGAIN.

Therefore revert the return result to EINVAL which matches the historical
expectations of the ibv_query_gid_type() API of the libibverbs user space
library.

Cc: <stable@vger.kernel.org>
Fixes: 598ff6bae6 ("IB/core: Refactor GID modify code for RoCE")
Fixes: 03db3a2d81 ("IB/core: Add RoCE GID table management")
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Parav Pandit 2018-05-27 14:49:16 +03:00 committed by Jason Gunthorpe
parent 533d1daea8
commit a840c93ca7
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/core/cache.c
View File

@ -502,7 +502,7 @@ static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index,
return -EINVAL;
if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID)
return -EAGAIN;
return -EINVAL;
memcpy(gid, &table->data_vec[index].gid, sizeof(*gid));
if (attr) {