luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

PCI: endpoint: Fix clearing start entry in configfs

Browse Source 
After an endpoint is started through configfs, if 0 is written to the
configfs entry 'start', the controller stops but the epc_group->start
value remains 1.

A subsequent unlinking of the function from the controller would trigger
a spurious WARN_ON_ONCE() in pci_epc_epf_unlink() despite right
behavior.

Fix it by setting epc_group->start = 0 when a controller is stopped
using configfs.

Fixes: d746799116 ("PCI: endpoint: Introduce configfs entry for configuring EP functions")
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Kunihiko Hayashi 2020-02-26 14:52:23 +09:00 committed by Lorenzo Pieralisi
parent c57247f940
commit f58d5f53c8
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/pci/endpoint/pci-ep-cfs.c
View File

@ -57,6 +57,7 @@ static ssize_t pci_epc_start_store(struct config_item *item, const char *page,
if (!start) {
pci_epc_stop(epc);
epc_group->start = 0;
return len;
}