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authorRajmohan Mani <rajmohan.mani@intel.com>2020-08-17 18:55:21 +0300
committerMika Westerberg <mika.westerberg@linux.intel.com>2020-09-03 12:06:40 +0300
commit6651c91de042f8ad601b522cb8d33de84246ddc7 (patch)
tree5d5ba0056868b8ca86fdd5b080328fec2c2e82b3 /drivers/thunderbolt/nhi_ops.c
parentdc4c4bf122ed58f7fc1870c483e2e1dbe6912b2f (diff)
downloadlinux-6651c91de042f8ad601b522cb8d33de84246ddc7.tar.xz
thunderbolt: Optimize NHI LC mailbox command processing
Currently the Ice Lake and Tiger Lake NHI (host controller) LC (link controller) mailbox command processing checks for the completion of command every 100 msecs. These controllers are found to complete this in the order of 1 ms or so. Since this delay is in suspend path, surplus delay is effectively affecting runtime PM suspend flows. Optimize this so that we do the wait for 1 ms after reading the mailbox register. This should make Ice Lake and Tiger Lake runtime suspend take less time to complete. Reported-by: Dana Alkattan <dana.alkattan@intel.com> Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/nhi_ops.c')
-rw-r--r--drivers/thunderbolt/nhi_ops.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/thunderbolt/nhi_ops.c b/drivers/thunderbolt/nhi_ops.c
index c0d5ccbb10f5..28583f9faf46 100644
--- a/drivers/thunderbolt/nhi_ops.c
+++ b/drivers/thunderbolt/nhi_ops.c
@@ -97,7 +97,7 @@ static int icl_nhi_lc_mailbox_cmd_complete(struct tb_nhi *nhi, int timeout)
pci_read_config_dword(nhi->pdev, VS_CAP_18, &data);
if (data & VS_CAP_18_DONE)
goto clear;
- msleep(100);
+ usleep_range(1000, 1100);
} while (time_before(jiffies, end));
return -ETIMEDOUT;