The MAP_FAILED should be used to determine whether the mapping is
successful.
Fixes: e41856b515ce ("raw/ifpga/base: enhance driver reliability in
multi-process")
Cc: [email protected]
Signed-off-by: Chengwen Feng <[email protected]>
---
drivers/raw/ifpga/base/opae_hw_api.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/raw/ifpga/base/opae_hw_api.c
b/drivers/raw/ifpga/base/opae_hw_api.c
index 1117c3e160..6d48d227d6 100644
--- a/drivers/raw/ifpga/base/opae_hw_api.c
+++ b/drivers/raw/ifpga/base/opae_hw_api.c
@@ -380,7 +380,7 @@ static pthread_mutex_t *opae_adapter_mutex_open(struct
opae_adapter *adapter)
PROT_READ | PROT_WRITE, MAP_SHARED,
shm_id, 0);
adapter->lock = (pthread_mutex_t *)ptr;
- if (ptr) {
+ if (ptr != MAP_FAILED) {
dev_info(NULL,
"shared memory %s address is %p\n",
shm_name, ptr);
@@ -499,7 +499,7 @@ static void *opae_adapter_shm_alloc(struct opae_adapter
*adapter)
adapter->shm.size = size;
adapter->shm.ptr = mmap(NULL, size, PROT_READ | PROT_WRITE,
MAP_SHARED, shm_id, 0);
- if (adapter->shm.ptr) {
+ if (adapter->shm.ptr != MAP_FAILED) {
dev_info(NULL,
"shared memory %s address is %p\n",
shm_name, adapter->shm.ptr);
--
2.17.1
