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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2017-06-06 14:25:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-09 11:42:43 +0200 |
| commit | bdccf295d7cdf6f28ceec1dcc31a79d0a1697d21 (patch) | |
| tree | 41926128da459fc10bfaba4b3ce6feec0cab1a0e /drivers/thunderbolt/nhi.h | |
| parent | thunderbolt: Add support for DMA configuration based mailbox (diff) | |
| download | linux-bdccf295d7cdf6f28ceec1dcc31a79d0a1697d21.tar.xz linux-bdccf295d7cdf6f28ceec1dcc31a79d0a1697d21.zip | |
thunderbolt: Do not touch the hardware if the NHI is gone on resume
On PCs the NHI host controller is only present when there is a device
connected. When the last device is disconnected the host controller will
dissappear shortly (within 10s). Now if that happens when we are
suspended we should not try to touch the hardware anymore, so add a flag
for this and check it before we re-enable rings.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Reviewed-by: Michael Jamet <michael.jamet@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/thunderbolt/nhi.h')
| -rw-r--r-- | drivers/thunderbolt/nhi.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/thunderbolt/nhi.h b/drivers/thunderbolt/nhi.h index 446ff6dac91d..953864ae0ab3 100644 --- a/drivers/thunderbolt/nhi.h +++ b/drivers/thunderbolt/nhi.h @@ -20,6 +20,8 @@ * @tx_rings: All Tx rings available on this host controller * @rx_rings: All Rx rings available on this host controller * @msix_ida: Used to allocate MSI-X vectors for rings + * @going_away: The host controller device is about to disappear so when + * this flag is set, avoid touching the hardware anymore. * @interrupt_work: Work scheduled to handle ring interrupt when no * MSI-X is used. * @hop_count: Number of rings (end point hops) supported by NHI. @@ -31,6 +33,7 @@ struct tb_nhi { struct tb_ring **tx_rings; struct tb_ring **rx_rings; struct ida msix_ida; + bool going_away; struct work_struct interrupt_work; u32 hop_count; }; |