diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_acpi.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_acpi.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c index 279206997e5c..622424692b3b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c | |||
@@ -46,7 +46,6 @@ static struct nouveau_dsm_priv { | |||
46 | bool dsm_detected; | 46 | bool dsm_detected; |
47 | bool optimus_detected; | 47 | bool optimus_detected; |
48 | acpi_handle dhandle; | 48 | acpi_handle dhandle; |
49 | acpi_handle other_handle; | ||
50 | acpi_handle rom_handle; | 49 | acpi_handle rom_handle; |
51 | } nouveau_dsm_priv; | 50 | } nouveau_dsm_priv; |
52 | 51 | ||
@@ -222,10 +221,9 @@ static int nouveau_dsm_pci_probe(struct pci_dev *pdev) | |||
222 | if (!dhandle) | 221 | if (!dhandle) |
223 | return false; | 222 | return false; |
224 | 223 | ||
225 | if (!acpi_has_method(dhandle, "_DSM")) { | 224 | if (!acpi_has_method(dhandle, "_DSM")) |
226 | nouveau_dsm_priv.other_handle = dhandle; | ||
227 | return false; | 225 | return false; |
228 | } | 226 | |
229 | if (acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102, | 227 | if (acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102, |
230 | 1 << NOUVEAU_DSM_POWER)) | 228 | 1 << NOUVEAU_DSM_POWER)) |
231 | retval |= NOUVEAU_DSM_HAS_MUX; | 229 | retval |= NOUVEAU_DSM_HAS_MUX; |
@@ -301,16 +299,6 @@ static bool nouveau_dsm_detect(void) | |||
301 | printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n", | 299 | printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n", |
302 | acpi_method_name); | 300 | acpi_method_name); |
303 | nouveau_dsm_priv.dsm_detected = true; | 301 | nouveau_dsm_priv.dsm_detected = true; |
304 | /* | ||
305 | * On some systems hotplug events are generated for the device | ||
306 | * being switched off when _DSM is executed. They cause ACPI | ||
307 | * hotplug to trigger and attempt to remove the device from | ||
308 | * the system, which causes it to break down. Prevent that from | ||
309 | * happening by setting the no_hotplug flag for the involved | ||
310 | * ACPI device objects. | ||
311 | */ | ||
312 | acpi_bus_no_hotplug(nouveau_dsm_priv.dhandle); | ||
313 | acpi_bus_no_hotplug(nouveau_dsm_priv.other_handle); | ||
314 | ret = true; | 302 | ret = true; |
315 | } | 303 | } |
316 | 304 | ||