From 0806a6afe155828420fe5b612ebf0bb1b92f72c3 Mon Sep 17 00:00:00 2001 From: Fenghua Yu Date: Sun, 24 Sep 2023 09:22:32 -0700 Subject: [PATCH] dmaengine: idxd: Register dsa_bus_type before registering idxd sub-drivers [ Upstream commit 88928addeec577386e8c83b48b5bc24d28ba97fd ] idxd sub-drivers belong to bus dsa_bus_type. Thus, dsa_bus_type must be registered in dsa bus init before idxd drivers can be registered. But the order is wrong when both idxd and idxd_bus are builtin drivers. In this case, idxd driver is compiled and linked before idxd_bus driver. Since the initcall order is determined by the link order, idxd sub-drivers are registered in idxd initcall before dsa_bus_type is registered in idxd_bus initcall. idxd initcall fails: [ 21.562803] calling idxd_init_module+0x0/0x110 @ 1 [ 21.570761] Driver 'idxd' was unable to register with bus_type 'dsa' because the bus was not initialized. [ 21.586475] initcall idxd_init_module+0x0/0x110 returned -22 after 15717 usecs [ 21.597178] calling dsa_bus_init+0x0/0x20 @ 1 To fix the issue, compile and link idxd_bus driver before idxd driver to ensure the right registration order. Fixes: d9e5481fca74 ("dmaengine: dsa: move dsa_bus_type out of idxd driver to standalone") Reported-by: Michael Prinke Signed-off-by: Fenghua Yu Reviewed-by: Dave Jiang Reviewed-by: Lijun Pan Tested-by: Lijun Pan Link: https://lore.kernel.org/r/20230924162232.1409454-1-fenghua.yu@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/idxd/Makefile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/dma/idxd/Makefile b/drivers/dma/idxd/Makefile index a1e9f2b3a37c..817ffa95a9b1 100644 --- a/drivers/dma/idxd/Makefile +++ b/drivers/dma/idxd/Makefile @@ -1,12 +1,12 @@ ccflags-y += -DDEFAULT_SYMBOL_NAMESPACE=IDXD +obj-$(CONFIG_INTEL_IDXD_BUS) += idxd_bus.o +idxd_bus-y := bus.o + obj-$(CONFIG_INTEL_IDXD) += idxd.o idxd-y := init.o irq.o device.o sysfs.o submit.o dma.o cdev.o idxd-$(CONFIG_INTEL_IDXD_PERFMON) += perfmon.o -obj-$(CONFIG_INTEL_IDXD_BUS) += idxd_bus.o -idxd_bus-y := bus.o - obj-$(CONFIG_INTEL_IDXD_COMPAT) += idxd_compat.o idxd_compat-y := compat.o