Messages in this thread Patch in this message | | | Subject | [PATCH] sil3531: has no PM capability, remove support. | From | philby john <> | Date | Mon, 09 Apr 2012 19:44:09 +0530 |
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From: Philby John <pjohn@mvista.com> Date: Mon, 9 Apr 2012 19:09:51 +0530 Subject: [PATCH] sil3531: has no PM capability, remove support.
SATA sil3531 does not support Power Management Capability and as per the manual Bit [31:27] is hardwired to 00h. Otherwise, when the device goes into suspend/resume the Power Management Control + Status registers are accessed and the arch specific readl()/__raw_readl() calls block indefinitely.
This patch sets the PCI_DEV_FLAGS_NO_D3 flag by which the if condition in pci_set_power_state() evaluates to true and pci_raw_set_power_state() functions are not executed.
Signed-off-by: Philby John <pjohn@mvista.com> Signed-off-by: Johnny Chiang <Johnny.Chiang@caviumnetworks.com> --- drivers/pci/pci.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 8156744..129120d 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1863,6 +1863,7 @@ void pci_pm_init(struct pci_dev *dev) pci_pme_active(dev, false); } else { dev->pme_support = 0; + dev->dev_flags |= PCI_DEV_FLAGS_NO_D3; } } -- 1.6.3.3.340.g77d18
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