linux-kernel - [PATCH 4.4 119/312] isa: Call isa_bus_init before dependent ISA bus drivers register

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Date:   Fri,  8 May 2020 14:31:50 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Rene Herman <rene.herman@...access.nl>,
        William Breathitt Gray <vilhelm.gray@...il.com>
Subject: [PATCH 4.4 119/312] isa: Call isa_bus_init before dependent ISA bus drivers register

From: William Breathitt Gray <vilhelm.gray@...il.com>

commit 32a5a0c047343b11f581f663a2309cf43d13466f upstream.

The isa_bus_init function must be called before drivers which utilize
the ISA bus driver are registered. A race condition for initilization
exists if device_initcall is used (the isa_bus_init callback is placed
in the same initcall level as dependent drivers which use module_init).
This patch ensures that isa_bus_init is called first by utilizing
postcore_initcall in favor of device_initcall.

Fixes: a5117ba7da37 ("[PATCH] Driver model: add ISA bus")
Cc: Rene Herman <rene.herman@...access.nl>
Signed-off-by: William Breathitt Gray <vilhelm.gray@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/base/isa.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/base/isa.c
+++ b/drivers/base/isa.c
@@ -180,4 +180,4 @@ static int __init isa_bus_init(void)
 	return error;
 }
 
-device_initcall(isa_bus_init);
+postcore_initcall(isa_bus_init);