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[09/11] apple-gmux: Assign apple_gmux_data before registering

Message ID e5e8781fac16cf2b8d864e216c78464e81d63f14.1429610300.git.lukas@wunner.de (mailing list archive)
State New, archived
Headers show

Commit Message

Lukas Wunner March 5, 2014, 10:34 p.m. UTC 
From: Matthew Garrett <matthew.garrett@nebula.com>

Registering the handler after both GPUs will trigger a DDC switch for
connector reprobing. This will oops if apple_gmux_data hasn't already been
assigned. Reorder the code to do that.

Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
---
 drivers/platform/x86/apple-gmux.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
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Patch

diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
index 9aafbde..05bba92 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -573,18 +573,20 @@  static int gmux_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
 		gmux_data->gpe = -1;
 	}
 
+	apple_gmux_data = gmux_data;
+	init_completion(&gmux_data->powerchange_done);
+	gmux_enable_interrupts(gmux_data);
+
 	if (vga_switcheroo_register_handler(&gmux_handler)) {
 		ret = -ENODEV;
 		goto err_register_handler;
 	}
 
-	init_completion(&gmux_data->powerchange_done);
-	apple_gmux_data = gmux_data;
-	gmux_enable_interrupts(gmux_data);
-
 	return 0;
 
 err_register_handler:
+	gmux_disable_interrupts(gmux_data);
+	apple_gmux_data = NULL;
 	if (gmux_data->gpe >= 0)
 		acpi_disable_gpe(NULL, gmux_data->gpe);
 err_enable_gpe: