kni: fix build for SLES15-SP3 (Make)

[ upstream commit c28e216 ]

Note: The actual commit c28e216 is already in 19.11. This is the
backport by Kalesh to also fix make based builds.

As suse version numbering is inconsistent to determine Linux kernel
API to be used. In this patch we check parameter of 'ndo_tx_timeout'
API directly from the kernel source. This is done only for suse build.

Bugzilla ID: 812
Cc: stable@dpdk.org

Tested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Kalesh Anakkur Purayil <kalesh-anakkur.purayil@broadcom.com>

kernel/linux/kni/Makefile

@@ -16,6 +16,16 @@ MODULE_CFLAGS += -I$(RTE_OUTPUT)/include
 MODULE_CFLAGS += -include $(RTE_OUTPUT)/include/rte_config.h
 MODULE_CFLAGS += -Wall -Werror
 
+#
+# Use explicit 'source' folder for header path. In SUSE 'source' is not linked to 'build' folder.
+#
+ifdef CONFIG_SUSE_KERNEL
+   KSRC = /lib/modules/$(shell uname -r)/source
+   ifneq ($(shell grep -A 1 "ndo_tx_timeout" $(KSRC)/include/linux/netdevice.h | grep -o txqueue),)
+      MODULE_CFLAGS += -DHAVE_TX_TIMEOUT_TXQUEUE
+   endif
+endif
+
 -include /etc/lsb-release
 
 ifeq ($(DISTRIB_ID),Ubuntu)