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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2009-09-20 14:09:22 -0300
committerLen Brown <len.brown@intel.com>2009-09-20 13:43:29 -0400
commit435c47e20bc212d0fa6652ac93fae8eaee7b9b34 (patch)
tree2cd23fc6a2324023f728a8595c42d82d842e3cef /drivers/platform
parent5f0dadb4bd259c3b832e19702f552947244edfb9 (diff)
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thinkpad-acpi: don't leave ERR_PTR() pointers around
backlight_device_register returns ERR_PTR() in case of problems, and the current code would leave that ERR_PTR in ibm_backlight_device. The current code paths won't touch it in that situation, but that could change. Make sure to set ibm_backlight_device to NULL in the error path. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/thinkpad_acpi.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index f78d2750392..b789ee8bc14 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -6010,8 +6010,10 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
&ibm_backlight_data);
if (IS_ERR(ibm_backlight_device)) {
+ int rc = PTR_ERR(ibm_backlight_device);
+ ibm_backlight_device = NULL;
printk(TPACPI_ERR "Could not register backlight device\n");
- return PTR_ERR(ibm_backlight_device);
+ return rc;
}
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
"brightness is supported\n");