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| author | Qipeng Zha <qipeng.zha@intel.com> | 2016-02-18 02:03:38 +0800 |
|---|---|---|
| committer | Darren Hart <dvhart@linux.intel.com> | 2016-03-23 10:05:47 -0700 |
| commit | 1f1ae997fd47d058522f32b91059111dbc4a2b54 (patch) | |
| tree | 08fad509a111ab984420925405e587ee2aa8a087 | |
| parent | 1a2f25d5e73f4f1ae985801a05ed37bbe0ea11f3 (diff) | |
| download | linux-1f1ae997fd47d058522f32b91059111dbc4a2b54.tar.bz2 | |
intel_pmc_ipc: Avoid pending IPC1 command during legacy suspend
During legacy suspend flow, IPC1 commands are being requested
from opregion driver. But the PMC_IPC1 command will timeout as example:
[ 281.444600] ipc_debug##: ipc_send_command: cmd=0x201ff,
[ 281.444648] wbuf[0]=0x4ea6
[ 281.444668] wbuf[1]=0x0
[ 281.444674] wbuf[2]=0x0
[ 281.444676] wbuf[3]=0x0
[ 284.446467] pmc-ipc-plat INT34D2:00: IPC timed out, TS=0x4, CMD=0x200ff
This is because before the opregion driver could send IPC1 commands,
the PMC_IPC irq is already suspended. Which makes the IPC command to
timeout.
Solution: register pmc_ipc irq as IRQF_NO_SUSPEND
Signed-off-by: Ananth Krishna R <ananth.krishna.r@intel.com>
Signed-off-by: Bharath K Veera <bharath.k.veera@intel.com>
Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
| -rw-r--r-- | drivers/platform/x86/intel_pmc_ipc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c index 3b0182c189d6..3fb1d85c70a8 100644 --- a/drivers/platform/x86/intel_pmc_ipc.c +++ b/drivers/platform/x86/intel_pmc_ipc.c @@ -825,7 +825,8 @@ static int ipc_plat_probe(struct platform_device *pdev) goto err_device; } - if (request_irq(ipcdev.irq, ioc, 0, "intel_pmc_ipc", &ipcdev)) { + if (request_irq(ipcdev.irq, ioc, IRQF_NO_SUSPEND, + "intel_pmc_ipc", &ipcdev)) { dev_err(&pdev->dev, "Failed to request irq\n"); ret = -EBUSY; goto err_irq; |