Revert two xhci fixes that break USB mass storage (rhbz 1073180)
This commit is contained in:
Josh Boyer
parent
9009e17724
commit
94c7eab835
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From 1b4b61e873240faea96995cd87cfbe7bc51a2b39 Mon Sep 17 00:00:00 2001
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From: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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Date: Tue, 04 Mar 2014 22:23:47 +0000
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Subject: Revert "USBNET: ax88179_178a: enable tso if usb host supports sg dma"
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This reverts commit 3804fad45411b48233b48003e33a78f290d227c8.
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The xHCI driver does not implement TD fragment rules yet, so we can't
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properly support arbitrary-length scatter gather. USB storage seems
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immune to these issues, and only the ASIX host seems to hit them, so
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disable scatter gather.
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Note that we can't simply work around this by clearing the
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no_sg_constraint flag for 1.0 xHCI hosts that need TD fragments (and
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thus would cause the ASIX chipsets to drop packets). We tried that with
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commit 247bf557273d "xhci 1.0: Limit arbitrarily-aligned scatter
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gather." We found that commit breaks USB 3.0 mass storage devices. It
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needs to get reverted, and this commit needs to get reverted before it
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to avoid dropped packets with the ASIX ethernet adapters.
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Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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Cc: stable@vger.kernel.org # 3.12
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---
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diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c
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index 955df81..42085e6 100644
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--- a/drivers/net/usb/ax88179_178a.c
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+++ b/drivers/net/usb/ax88179_178a.c
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@@ -1029,20 +1029,12 @@ static int ax88179_bind(struct usbnet *dev, struct usb_interface *intf)
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dev->mii.phy_id = 0x03;
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dev->mii.supports_gmii = 1;
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- if (usb_device_no_sg_constraint(dev->udev))
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- dev->can_dma_sg = 1;
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-
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dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
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NETIF_F_RXCSUM;
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dev->net->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
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NETIF_F_RXCSUM;
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- if (dev->can_dma_sg) {
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- dev->net->features |= NETIF_F_SG | NETIF_F_TSO;
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- dev->net->hw_features |= NETIF_F_SG | NETIF_F_TSO;
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- }
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-
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/* Enable checksum offload */
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*tmp = AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
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AX_RXCOE_TCPV6 | AX_RXCOE_UDPV6;
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--
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cgit v0.9.2
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@ -0,0 +1,86 @@
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From 7efb6dbd0d825899955fd4035504823bb5c1124c Mon Sep 17 00:00:00 2001
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From: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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Date: Tue, 04 Mar 2014 22:28:16 +0000
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Subject: Revert "xhci 1.0: Limit arbitrarily-aligned scatter gather."
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This reverts commit 247bf557273dd775505fb9240d2d152f4f20d304, since it
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causes USB 3.0 mass storage devices to fail on xHCI 1.0 hosts.
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The block layer may submit scatter-gather lists with entries that
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are multiples of 512-byte blocks. That's fine for USB 2.0 devices,
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where the bulk endpoint max packet size is 512 bytes. But USB 3.0
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devices have bulk endpoints with a 1024 byte max packet size.
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That means when the block layer submits a scatter-gather list with one
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entry that includes, say, three 512-byte blocks, this code will reject
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the URB if it's submitted to a USB 3.0 bulk endpoint:
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int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
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{
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...
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max = usb_endpoint_maxp(&ep->desc);
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...
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} else if (urb->num_sgs && !urb->dev->bus->no_sg_constraint &&
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dev->speed != USB_SPEED_WIRELESS) {
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struct scatterlist *sg;
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int i;
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for_each_sg(urb->sg, sg, urb->num_sgs - 1, i)
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if (sg->length % max)
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return -EINVAL;
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}
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This results in failures with USB 3.0 drives. For me, a failure to
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auto-mount the device. For others, a read or write SCSI command
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failure.
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This commit was put in place so that we could get scatter-gather support
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for the ASIX USB ethernet adapter on non-1.0 hosts. It was a quick fix
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until we implemented TD fragments properly in the driver. Since it
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breaks USB 3.0 mass storage, we need to revert it, and revert
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scatter-gather support for the ASIX devices.
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Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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Cc: stable@vger.kernel.org # 3.12
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---
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diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
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index 652be21..8fe4e12 100644
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--- a/drivers/usb/host/xhci.c
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+++ b/drivers/usb/host/xhci.c
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@@ -4762,6 +4762,9 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
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/* Accept arbitrarily long scatter-gather lists */
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hcd->self.sg_tablesize = ~0;
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+ /* support to build packet from discontinuous buffers */
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+ hcd->self.no_sg_constraint = 1;
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+
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/* XHCI controllers don't stop the ep queue on short packets :| */
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hcd->self.no_stop_on_short = 1;
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@@ -4786,14 +4789,6 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
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/* xHCI private pointer was set in xhci_pci_probe for the second
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* registered roothub.
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*/
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- xhci = hcd_to_xhci(hcd);
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- /*
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- * Support arbitrarily aligned sg-list entries on hosts without
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- * TD fragment rules (which are currently unsupported).
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- */
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- if (xhci->hci_version < 0x100)
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- hcd->self.no_sg_constraint = 1;
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-
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return 0;
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}
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@@ -4822,9 +4817,6 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
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if (xhci->hci_version > 0x96)
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xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
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- if (xhci->hci_version < 0x100)
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- hcd->self.no_sg_constraint = 1;
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-
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/* Make sure the HC is halted. */
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retval = xhci_halt(xhci);
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if (retval)
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--
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cgit v0.9.2
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11
kernel.spec
11
kernel.spec
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@ -655,6 +655,10 @@ Patch25036: ppc64le_module_fix.patch
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#rhbz 1003602
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Patch25037: ACPI-EC-Clear-stale-EC-events-on-Samsung-systems.patch
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#rhbz 1073180
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Patch25038: Revert-USBNET-ax88179_178a-enable-tso-if-usb-host-supports-sg-dma.patch
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Patch25039: Revert-xhci-1.0-Limit-arbitrarily-aligned-scatter-gather.patch
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# END OF PATCH DEFINITIONS
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%endif
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@ -1317,6 +1321,10 @@ ApplyPatch ppc64le_module_fix.patch
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#rhbz 1003602
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ApplyPatch ACPI-EC-Clear-stale-EC-events-on-Samsung-systems.patch
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#rhbz 1073180
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ApplyPatch Revert-USBNET-ax88179_178a-enable-tso-if-usb-host-supports-sg-dma.patch
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ApplyPatch Revert-xhci-1.0-Limit-arbitrarily-aligned-scatter-gather.patch
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# END OF PATCH APPLICATIONS
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%endif
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@ -2096,6 +2104,9 @@ fi
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# ||----w |
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# || ||
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%changelog
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* Fri Mar 07 2014 Josh Boyer <jwboyer@fedoraproject.org>
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- Revert two xhci fixes that break USB mass storage (rhbz 1073180)
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* Thu Mar 06 2014 Josh Boyer <jwboyer@fedoraproject.org>
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- Fix stale EC events on Samsung systems (rhbz 1003602)
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- Add ppc64le support from Brent Baude (rhbz 1073102)
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