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| author |   Jisheng Zhang <Jisheng.Zhang@synaptics.com> | 2018-09-20 16:32:52 -0500 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2018-09-20 16:36:20 -0500 |
| commit | 9024143e700f89d74b8cdaf316a3499d74fc56fe (patch) | |
| tree | 21b380d0e4f4b0088a076d0c40be1fe975531ab0 /drivers/pci/hotplug/acpiphp_glue.c | |
| parent | MAINTAINERS: Move mobiveil PCI driver entry where it belongs (diff) | |
| download | wireguard-linux-9024143e700f89d74b8cdaf316a3499d74fc56fe.tar.xz wireguard-linux-9024143e700f89d74b8cdaf316a3499d74fc56fe.zip | |
PCI: dwc: Fix scheduling while atomic issues
When programming the inbound/outbound ATUs, we call usleep_range() after
each checking PCIE_ATU_ENABLE bit. Unfortunately, the ATU programming
can be executed in atomic context:
inbound ATU programming could be called through
pci_epc_write_header()
=>dw_pcie_ep_write_header()
=>dw_pcie_prog_inbound_atu()
outbound ATU programming could be called through
pci_bus_read_config_dword()
=>dw_pcie_rd_conf()
=>dw_pcie_prog_outbound_atu()
Fix this issue by calling mdelay() instead.
Fixes: f8aed6ec624f ("PCI: dwc: designware: Add EP mode support")
Fixes: d8bbeb39fbf3 ("PCI: designware: Wait for iATU enable")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
[lorenzo.pieralisi@arm.com: commit log update]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions