[PATCH v1 4/7] fpga: dfl: fix VF creation when ports have no local BAR space
From: Tianfei zhang <hidden>
Date: 2022-02-14 11:43:50
Also in:
linux-fpga, lkml
Subsystem:
fpga dfl drivers, fpga manager framework, the rest · Maintainers:
Xu Yilun, Moritz Fischer, Linus Torvalds
From: Matthew Gerlach <redacted> When a port is not connected to the same PCIe endpoint as the FME, the port does not need to be released before being virtualized. Fix VF creation code to handle this new use case. Signed-off-by: Matthew Gerlach <redacted> Signed-off-by: Tianfei Zhang <redacted> --- drivers/fpga/dfl.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index 26f8cf890700..cfc539a656f0 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c@@ -1705,15 +1705,22 @@ EXPORT_SYMBOL_GPL(dfl_fpga_cdev_config_ports_pf); int dfl_fpga_cdev_config_ports_vf(struct dfl_fpga_cdev *cdev, int num_vfs) { struct dfl_feature_platform_data *pdata; - int ret = 0; + int ret = 0, port_count = 0; mutex_lock(&cdev->lock); + + list_for_each_entry(pdata, &cdev->port_dev_list, node) { + if (pdata->dev) + continue; + port_count++; + } + /* * can't turn multiple ports into 1 VF device, only 1 port for 1 VF * device, so if released port number doesn't match VF device number, * then reject the request with -EINVAL error code. */ - if (cdev->released_port_num != num_vfs) { + if (port_count && cdev->released_port_num != num_vfs) { ret = -EINVAL; goto done; }
--
2.17.1