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author | David S. Miller <davem@davemloft.net> | 2014-01-14 14:37:09 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2014-01-14 14:42:42 -0800 |
commit | 0a379e21c503b2ff66b44d588df9f231e9b0b9ca (patch) | |
tree | 22b875fcf4b67fcd007726f00c5fc1748ce985d0 /drivers/gpu/drm/radeon/radeon_atpx_handler.c | |
parent | Merge branch 'skb_checksum_help' (diff) | |
parent | net: usbnet: fix SG initialisation (diff) | |
download | linux-dev-0a379e21c503b2ff66b44d588df9f231e9b0b9ca.tar.xz linux-dev-0a379e21c503b2ff66b44d588df9f231e9b0b9ca.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_atpx_handler.c')
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_atpx_handler.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c index 9d302eaeea15..485848f889f5 100644 --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c @@ -33,6 +33,7 @@ static struct radeon_atpx_priv { bool atpx_detected; /* handle for device - and atpx */ acpi_handle dhandle; + acpi_handle other_handle; struct radeon_atpx atpx; } radeon_atpx_priv; @@ -451,9 +452,10 @@ static bool radeon_atpx_pci_probe_handle(struct pci_dev *pdev) return false; status = acpi_get_handle(dhandle, "ATPX", &atpx_handle); - if (ACPI_FAILURE(status)) + if (ACPI_FAILURE(status)) { + radeon_atpx_priv.other_handle = dhandle; return false; - + } radeon_atpx_priv.dhandle = dhandle; radeon_atpx_priv.atpx.handle = atpx_handle; return true; @@ -530,6 +532,16 @@ static bool radeon_atpx_detect(void) printk(KERN_INFO "VGA switcheroo: detected switching method %s handle\n", acpi_method_name); radeon_atpx_priv.atpx_detected = true; + /* + * On some systems hotplug events are generated for the device + * being switched off when ATPX is executed. They cause ACPI + * hotplug to trigger and attempt to remove the device from + * the system, which causes it to break down. Prevent that from + * happening by setting the no_hotplug flag for the involved + * ACPI device objects. + */ + acpi_bus_no_hotplug(radeon_atpx_priv.dhandle); + acpi_bus_no_hotplug(radeon_atpx_priv.other_handle); return true; } return false; |