From: David Mueller <dave.mueller@xxxxxx>
If additional PCIe switch get connected between the
host and the NIC,the kernel crashes with "BUG:
scheduling while atomic". To handle this we need to
call mdelay() instead of usleep_range().
This is currently called from atomic context through
pci_config_{read,write).
For more detail please refer bugzilla.kernel.org, Bug
100031
Signed-off-by: David Mueller <dave.mueller@xxxxxx>
Signed-off-by: Sanjeev Sharma <sanjeev_sharma@xxxxxxxxxx>
Changes in v2:
-order of signoff has been change
-Author of patch has been change
-A mdelay(1000) is different timescale than
a usleep(1000).change it to correct scale i.e mdelay(1)
-updated comment
---
drivers/pci/host/pci-imx6.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index 233a196..c03527f 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -499,7 +499,7 @@ static int imx6_pcie_link_up(struct pcie_port *pp)
* Wait a little bit, then re-check if the link finished
* the training.
*/
- usleep_range(1000, 2000);
+ mdelay(1);
}
/*
* From L0, initiate MAC entry to gen2 if EP/RC supports gen2.
--
1.7.11.7
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