PCI: endpoint: Fix clearing start entry in configfs

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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>

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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

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

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