diff options
| author | Vaibhav Jain <vaibhav@linux.ibm.com> | 2018-07-04 20:58:33 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-09 20:01:20 +0200 |
| commit | 6f329f2767460f97dd56a54a1511aea84287f5ae (patch) | |
| tree | c6d252579a94e53f9f6a05ac0658182e7ed9afe0 | |
| parent | f8700e03c86c9d81483339a2d4fd33777a6debd8 (diff) | |
cxl: Fix wrong comparison in cxl_adapter_context_get()
commit ef6cb5f1a048fdf91ccee6d63d2bfa293338502d upstream.
Function atomic_inc_unless_negative() returns a bool to indicate
success/failure. However cxl_adapter_context_get() wrongly compares
the return value against '>=0' which will always be true. The patch
fixes this comparison to '==0' there by also fixing this compile time
warning:
drivers/misc/cxl/main.c:290 cxl_adapter_context_get()
warn: 'atomic_inc_unless_negative(&adapter->contexts_num)' is unsigned
Fixes: 70b565bbdb91 ("cxl: Prevent adapter reset if an active context exists")
Cc: stable@vger.kernel.org # v4.9+
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/cxl/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c index cc1706a92ace..a078d49485d8 100644 --- a/drivers/misc/cxl/main.c +++ b/drivers/misc/cxl/main.c @@ -293,7 +293,7 @@ int cxl_adapter_context_get(struct cxl *adapter) int rc; rc = atomic_inc_unless_negative(&adapter->contexts_num); - return rc >= 0 ? 0 : -EBUSY; + return rc ? 0 : -EBUSY; } void cxl_adapter_context_put(struct cxl *adapter) |