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Date: Fri, 04 Mar 2011 17:03:09 -0800 From: Greg KH <gregkh@...e.de> To: linux-kernel@...r.kernel.org, stable@...nel.org Cc: stable-review@...nel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Stanislaw Gruszka <sgruszka@...hat.com>, "David S. Miller" <davem@...emloft.net> Subject: [15/18] r8169: disable ASPM 2.6.32-longterm review patch. If anyone has any objections, please let us know. ------------------ From: Stanislaw Gruszka <sgruszka@...hat.com> commit ba04c7c93bbcb48ce880cf75b6e9dffcd79d4c7b upstream. 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 <tomi.leppikangas@...il.com> Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- drivers/net/r8169.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -23,6 +23,7 @@ #include <linux/tcp.h> #include <linux/init.h> #include <linux/dma-mapping.h> +#include <linux/pci-aspm.h> #include <asm/system.h> #include <asm/io.h> @@ -3030,6 +3031,11 @@ rtl8169_init_one(struct pci_dev *pdev, c 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) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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