diff options
| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2023-06-02 13:47:50 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2023-06-23 22:05:11 +0200 |
| commit | a504c965588b781f864364e897917a2c7b48ea5b (patch) | |
| tree | 398699fe7d40c64a10401e65dc356cf22df86bb8 /drivers/pci/endpoint | |
| parent | PCI: endpoint: Pass EPF device ID to the probe function (diff) | |
| download | linux-a504c965588b781f864364e897917a2c7b48ea5b.tar.xz linux-a504c965588b781f864364e897917a2c7b48ea5b.zip | |
PCI: endpoint: Return error if EPC is started/stopped multiple times
When the EPC is started or stopped multiple times from configfs, just
return -EALREADY. There is no need to call the EPC start/stop functions
in those cases.
Link: https://lore.kernel.org/r/20230602114756.36586-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kishon Vijay Abraham I <kishon@kernel.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Diffstat (limited to 'drivers/pci/endpoint')
| -rw-r--r-- | drivers/pci/endpoint/pci-ep-cfs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/endpoint/pci-ep-cfs.c b/drivers/pci/endpoint/pci-ep-cfs.c index 18e061af1d8e..0ea64e24ed61 100644 --- a/drivers/pci/endpoint/pci-ep-cfs.c +++ b/drivers/pci/endpoint/pci-ep-cfs.c @@ -179,6 +179,9 @@ static ssize_t pci_epc_start_store(struct config_item *item, const char *page, if (kstrtobool(page, &start) < 0) return -EINVAL; + if (start == epc_group->start) + return -EALREADY; + if (!start) { pci_epc_stop(epc); epc_group->start = 0; |