From 08ad2bc6e7fd4bc11b25011dbae48268828d372f Mon Sep 17 00:00:00 2001 From: Chengwen Feng Date: Mon, 6 Feb 2023 10:53:11 +0000 Subject: raw/ifpga/base: fix init with multi-process [ upstream commit e6a2804b77c5fbfd97d0fe05ec7f959a0404a380 ] 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: stable@dpdk.org Signed-off-by: Chengwen Feng Reviewed-by: Rosen Xu --- 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 11c9887c7f..45efe70473 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); -- 2.23.0