linux-kernel - [Patch v2 2/3] firmware: google: Unregister driver

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Date:   Mon, 18 Nov 2019 09:38:59 +0100
From:   patrick.rudolph@...ements.com
To:     linux-kernel@...r.kernel.org
Cc:     coreboot@...eboot.org, Arthur Heymans <arthur@...ymans.xyz>,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Alexios Zavras <alexios.zavras@...el.com>,
        Allison Randal <allison@...utok.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [Patch v2 2/3] firmware: google: Unregister driver_info on failure and exit in gsmi

From: Arthur Heymans <arthur@...ymans.xyz>

Fix a bug where the kernel module couldn't be loaded after unloading,
as the platform driver wasn't released on exit.

Signed-off-by: Arthur Heymans <arthur@...ymans.xyz>
Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
---
 drivers/firmware/google/gsmi.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/firmware/google/gsmi.c b/drivers/firmware/google/gsmi.c
index edaa4e5d84ad..974c769b75cf 100644
--- a/drivers/firmware/google/gsmi.c
+++ b/drivers/firmware/google/gsmi.c
@@ -1016,6 +1016,9 @@ static __init int gsmi_init(void)
 	dma_pool_destroy(gsmi_dev.dma_pool);
 	platform_device_unregister(gsmi_dev.pdev);
 	pr_info("gsmi: failed to load: %d\n", ret);
+#ifdef CONFIG_PM
+	platform_driver_unregister(&gsmi_driver_info);
+#endif
 	return ret;
 }
 
@@ -1037,6 +1040,9 @@ static void __exit gsmi_exit(void)
 	gsmi_buf_free(gsmi_dev.name_buf);
 	dma_pool_destroy(gsmi_dev.dma_pool);
 	platform_device_unregister(gsmi_dev.pdev);
+#ifdef CONFIG_PM
+	platform_driver_unregister(&gsmi_driver_info);
+#endif
 }
 
 module_init(gsmi_init);
-- 
2.21.0