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From: Stephen Boyd <swboyd@chromium.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org,
	Wei-Ning Huang <wnhuang@chromium.org>,
	Julius Werner <jwerner@chromium.org>,
	Brian Norris <briannorris@chromium.org>,
	Samuel Holland <samuel@sholland.org>
Subject: [PATCH v3 3/7] firmware: coreboot: Make bus registration symmetric
Date: Thu,  9 Aug 2018 10:17:18 -0700
Message-ID: <20180809171722.144325-4-swboyd@chromium.org> (raw)
In-Reply-To: <20180809171722.144325-1-swboyd@chromium.org>

The bus is registered in module_init() but is unregistered when the
platform driver remove() function calls coreboot_table_exit(). That
isn't symmetric and it causes the bus to appear on systems that compile
this code in, even when there isn't any coreboot firmware on the device.
Let's move the registration to the coreboot_table_init() function so
that it matches the exit path.

Cc: Wei-Ning Huang <wnhuang@chromium.org>
Cc: Julius Werner <jwerner@chromium.org>
Cc: Brian Norris <briannorris@chromium.org>
Cc: Samuel Holland <samuel@sholland.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/firmware/google/coreboot_table.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/firmware/google/coreboot_table.c b/drivers/firmware/google/coreboot_table.c
index 0d3e140444ae..0e461d776ce6 100644
--- a/drivers/firmware/google/coreboot_table.c
+++ b/drivers/firmware/google/coreboot_table.c
@@ -70,12 +70,6 @@ static struct bus_type coreboot_bus_type = {
 	.remove		= coreboot_bus_remove,
 };
 
-static int __init coreboot_bus_init(void)
-{
-	return bus_register(&coreboot_bus_type);
-}
-module_init(coreboot_bus_init);
-
 static void coreboot_device_release(struct device *dev)
 {
 	struct coreboot_device *device = CB_DEV(dev);
@@ -113,6 +107,10 @@ int coreboot_table_init(struct device *dev, void __iomem *ptr)
 		return -ENODEV;
 	}
 
+	ret = bus_register(&coreboot_bus_type);
+	if (ret)
+		return ret;
+
 	ptr_entry = (void *)ptr_header + header.header_bytes;
 	for (i = 0; i < header.table_entries; i++) {
 		memcpy_fromio(&entry, ptr_entry, sizeof(entry));
@@ -138,8 +136,10 @@ int coreboot_table_init(struct device *dev, void __iomem *ptr)
 		ptr_entry += entry.size;
 	}
 
-	if (ret)
+	if (ret) {
+		bus_unregister(&coreboot_bus_type);
 		iounmap(ptr);
+	}
 
 	return ret;
 }
-- 
Sent by a computer through tubes


  parent reply index

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-09 17:17 [PATCH v3 0/7] firmware: coreboot: Fix probe and simplify code Stephen Boyd
2018-08-09 17:17 ` [PATCH v3 1/7] firmware: coreboot: Let OF core populate platform device Stephen Boyd
2018-08-09 17:31   ` Brian Norris
2018-08-09 17:17 ` [PATCH v3 2/7] firmware: coreboot: Unmap ioregion on failure Stephen Boyd
2018-08-09 17:49   ` Brian Norris
2018-08-09 19:40     ` Stephen Boyd
2018-08-09 19:52       ` Brian Norris
2018-08-09 23:25         ` Stephen Boyd
2018-08-09 17:17 ` Stephen Boyd [this message]
2018-08-09 18:10   ` [PATCH v3 3/7] firmware: coreboot: Make bus registration symmetric Julius Werner
2018-08-09 23:30     ` Stephen Boyd
2018-08-09 17:17 ` [PATCH v3 4/7] firmware: coreboot: Collapse platform drivers into bus core Stephen Boyd
2018-08-09 17:17 ` [PATCH v3 5/7] firmware: coreboot: Remap RAM with memremap() instead of ioremap() Stephen Boyd
2018-08-09 18:24   ` Julius Werner
2018-08-09 22:07     ` Stephen Boyd
2018-08-09 17:17 ` [PATCH v3 6/7] firmware: coreboot: Only populate devices in coreboot_table_init() Stephen Boyd
2018-08-09 21:02   ` Julius Werner
2018-08-09 23:43     ` Stephen Boyd
2018-08-09 17:17 ` [PATCH v3 7/7] firmware: coreboot: Request table region for exclusive access Stephen Boyd
2018-08-09 21:07   ` Julius Werner
2018-08-09 23:03     ` Stephen Boyd
2018-08-09 23:37       ` Julius Werner
2018-08-09 23:44         ` Julius Werner
2018-08-10  2:54           ` Stephen Boyd
2018-08-10 23:24             ` Stephen Boyd
2018-08-09 18:03 ` [PATCH v3 0/7] firmware: coreboot: Fix probe and simplify code Brian Norris

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