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| author |  Mika Westerberg <mika.westerberg@linux.intel.com>
| 2023-03-24 13:04:39 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com>
| 2023-06-09 12:07:24 +0300 |
| commit | 53ba2e16957b01eb7858e3ee5a3a8187a2892f15 (patch) | |
| tree | 560427aa175bf95f9103d8314351818f7e271fdc /drivers/thunderbolt/clx.c | |
| parent | thunderbolt: Make tb_switch_clx_disable() return CL states that were enabled (diff) | |
| download | linux-53ba2e16957b01eb7858e3ee5a3a8187a2892f15.tar.gz linux-53ba2e16957b01eb7858e3ee5a3a8187a2892f15.tar.bz2 linux-53ba2e16957b01eb7858e3ee5a3a8187a2892f15.zip | |
thunderbolt: Disable CL states when a DMA tunnel is established
Tunnels between hosts should not have CL states enabled because
otherwise they might enter a low power state without the other end
noticing which causes packets to be lost. For this reason disable all
CL states upon first DMA tunnel creation. Once the last DMA tunnel is
torn down we try to re-enable them.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/clx.c')
| -rw-r--r-- | drivers/thunderbolt/clx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/thunderbolt/clx.c b/drivers/thunderbolt/clx.c index 4f0cfbb24dd9..604cceb23659 100644 --- a/drivers/thunderbolt/clx.c +++ b/drivers/thunderbolt/clx.c @@ -317,7 +317,7 @@ int tb_switch_clx_enable(struct tb_switch *sw, unsigned int clx) struct tb_port *up, *down; int ret; - if (!clx) + if (!clx || sw->clx == clx) return 0; if (!validate_mask(clx)) |