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authorFrederic Barrat <fbarrat@linux.vnet.ibm.com>2016-02-24 18:27:51 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-03-09 15:34:55 -0800
commit816e8b31fceb50ebf0f4a9dea92fc64fc75b5999 (patch)
treeb1fd3d55025afdc90c11db53fdf31878e7002127 /drivers/misc
parent8eb8cd6c307984bdc568308f5853c4b4485156dd (diff)
cxl: Fix PSL timebase synchronization detection
commit 923adb1646d5ba739d2a1e63ee20d60574d9da8e upstream. The PSL timebase synchronization is seemingly failing for configuration not including VIRT_CPU_ACCOUNTING_NATIVE. The driver shows the following trace in dmesg: PSL: Timebase sync: giving up! The PSL timebase register is actually syncing correctly, but the cxl driver is not detecting it. Fix is to use the proper timebase-to-time conversion. Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Acked-by: Michael Neuling <mikey@neuling.org> Reviewed-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/cxl/pci.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 85761d7eb333..be2c8e248e2e 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -414,7 +414,7 @@ static int cxl_setup_psl_timebase(struct cxl *adapter, struct pci_dev *dev)
delta = mftb() - psl_tb;
if (delta < 0)
delta = -delta;
- } while (cputime_to_usecs(delta) > 16);
+ } while (tb_to_ns(delta) > 16000);
return 0;
}