eal: fix auxv open check for ARM and PPC

The assertion of return value from the open() function is done against
0, while it is a correct value - open() returns -1 in case of an error.
It causes problems while trying to run as a daemon, in which case, this
call to open() will return 0 as a valid descriptor.

Fixes: b94e5c9406b5 ("eal/arm: add CPU flags for ARMv7")
Fixes: 97523f822ba9 ("eal/arm: add CPU flags for ARMv8")
Fixes: 9ae155385686 ("eal/ppc: cpu flag checks for IBM Power")
Cc: stable@dpdk.org
Signed-off-by: Lukasz Majczak <lma@semihalf.com>
Acked-by: Jan Viktorin <viktorin@rehivetech.com>
Acked-by: Chao Zhu <chaozhu@linux.vnet.ibm.com>

diff --git a/lib/librte_eal/common/arch/arm/rte_cpuflags.c b/lib/librte_eal/common/arch/arm/rte_cpuflags.c
index 5636e9c..88f1cbe 100644 (file)
--- a/lib/librte_eal/common/arch/arm/rte_cpuflags.c
+++ b/lib/librte_eal/common/arch/arm/rte_cpuflags.c
@@ -137,7 +137,7 @@ rte_cpu_get_features(hwcap_registers_t out)
        _Elfx_auxv_t auxv;
 
        auxv_fd = open("/proc/self/auxv", O_RDONLY);
-       assert(auxv_fd);
+       assert(auxv_fd != -1);
        while (read(auxv_fd, &auxv, sizeof(auxv)) == sizeof(auxv)) {
                if (auxv.a_type == AT_HWCAP) {
                        out[REG_HWCAP] = auxv.a_un.a_val;

diff --git a/lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c b/lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c
index fcf96e0..970a61c 100644 (file)
--- a/lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c
+++ b/lib/librte_eal/common/arch/ppc_64/rte_cpuflags.c
@@ -108,7 +108,7 @@ rte_cpu_get_features(hwcap_registers_t out)
        Elf64_auxv_t auxv;
 
        auxv_fd = open("/proc/self/auxv", O_RDONLY);
-       assert(auxv_fd);
+       assert(auxv_fd != -1);
        while (read(auxv_fd, &auxv,
                sizeof(Elf64_auxv_t)) == sizeof(Elf64_auxv_t)) {
                if (auxv.a_type == AT_HWCAP)