USB: hcd: Mark secondary HCD as dead if the primary one died

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commit cd5a6a4fda upstream.

Make usb_hc_died() clear the HCD_FLAG_RH_RUNNING flag for the shared
HCD and set HCD_FLAG_DEAD for it, in analogy with what is done for
the primary one.

Among other thigs, this prevents check_root_hub_suspended() from
returning -EBUSY for dead HCDs which helps to work around system
suspend issues in some situations.

This actually fixes occasional suspend failures on one of my test
machines.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Rafael J. Wysocki 2017-07-25 23:58:50 +02:00 • committed by Ben Hutchings

parent d7450ff86e

commit 4371f924ef

1 changed files with 2 additions and 0 deletions

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drivers/usb/core/hcd.c

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