From: Heiner Kallweit <hkallweit1@gmail.com>
To: "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>
Subject: Disabling ASPM L1 sub-states selectively from drivers?
Date: Fri, 22 Feb 2019 07:16:01 +0100 [thread overview]
Message-ID: <4d8bf501-e367-917d-c808-d1938edaf007@gmail.com> (raw)
I face the issue that a PCIe network chip misses RX packets if ASPM L1
sub-states are enabled. It seems that the RX FIFO is too small to buffer
all incoming packets during ASPM exit latency.
So far pci_disable_link_state() only allows to disable L1 completely.
Would it make sense to extend this function to allow disabling
L1 sub-states selectively? Looking at pcie_config_aspm_link() this
seems to be possible.
next reply other threads:[~2019-02-22 6:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-22 6:16 Heiner Kallweit [this message]
2019-02-26 22:41 ` Disabling ASPM L1 sub-states selectively from drivers? Bjorn Helgaas
2019-02-27 23:58 ` Heiner Kallweit
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