The patch below does not apply to the .37-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From ba04c7c93bbcb48ce880cf75b6e9dffcd79d4c7b Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka <[email protected]> Date: Tue, 22 Feb 2011 02:00:11 +0000 Subject: [PATCH] r8169: disable ASPM For some time is known that ASPM is causing troubles on r8169, i.e. make device randomly stop working without any errors in dmesg. Currently Tomi Leppikangas reports that system with r8169 device hangs with MCE errors when ASPM is enabled: https://bugzilla.redhat.com/show_bug.cgi?id=642861#c4 Lets disable ASPM for r8169 devices at all, to avoid problems with r8169 PCIe devices at least for some users. Reported-by: Tomi Leppikangas <[email protected]> Cc: [email protected] Signed-off-by: Stanislaw Gruszka <[email protected]> Signed-off-by: David S. Miller <[email protected]> diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index ef2133b..7ffdb80 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -25,6 +25,7 @@ #include <linux/dma-mapping.h> #include <linux/pm_runtime.h> #include <linux/firmware.h> +#include <linux/pci-aspm.h> #include <asm/system.h> #include <asm/io.h> @@ -3020,6 +3021,11 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) mii->reg_num_mask = 0x1f; mii->supports_gmii = !!(cfg->features & RTL_FEATURE_GMII); + /* disable ASPM completely as that cause random device stop working + * problems as well as full system hangs for some PCIe devices users */ + pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | + PCIE_LINK_STATE_CLKPM); + /* enable device (incl. PCI PM wakeup and hotplug setup) */ rc = pci_enable_device(pdev); if (rc < 0) { _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
