Commit a504c965 authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam Committed by Bjorn Helgaas
Browse files

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: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: default avatarLorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarKishon Vijay Abraham I <kishon@kernel.org>
Reviewed-by: default avatarDamien Le Moal <dlemoal@kernel.org>
parent 081c715d

drivers/pci/endpoint/pci-ep-cfs.c

+3 −0
Original line number Diff line number Diff line
@@ -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;