Linux v3.6-rc4-53-g5b716ac
- Add patch to fix ibmveth issue from Santiago Leon (rhbz 852842)
This commit is contained in:
Josh Boyer
parent
221b79a9ac
commit
4755af6ee4
80
ibmveth-Fix-alignment-of-rx-queue-bug.patch
Normal file
80
ibmveth-Fix-alignment-of-rx-queue-bug.patch
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@ -0,0 +1,80 @@
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This patch fixes a bug found by Nish Aravamudan
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(https://lkml.org/lkml/2012/5/15/220) where the driver is not following
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the spec (it is not aligning the rx buffer on a 16-byte boundary) and the
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hypervisor aborts the registration, making the device unusable.
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The fix follows BenH's recommendation (https://lkml.org/lkml/2012/7/20/461)
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to replace the kmalloc+map for a single call to dma_alloc_coherent()
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because that function always aligns to a 16-byte boundary.
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The stable trees will run into this bug whenever the rx buffer kmalloc call
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returns something not aligned on a 16-byte boundary.
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Cc: <stable@vger.kernel.org>
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Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com>
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---
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ibmveth.c | 26 +++++++++-----------------
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1 file changed, 9 insertions(+), 17 deletions(-)
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--- a/drivers/net/ethernet/ibm/ibmveth.c 2012-07-09 16:00:53.000000000 -0400
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+++ b/drivers/net/ethernet/ibm/ibmveth.c 2012-08-17 19:51:02.840000188 -0400
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@@ -472,14 +472,9 @@ static void ibmveth_cleanup(struct ibmve
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}
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if (adapter->rx_queue.queue_addr != NULL) {
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- if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) {
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- dma_unmap_single(dev,
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- adapter->rx_queue.queue_dma,
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- adapter->rx_queue.queue_len,
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- DMA_BIDIRECTIONAL);
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- adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
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- }
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- kfree(adapter->rx_queue.queue_addr);
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+ dma_free_coherent(dev, adapter->rx_queue.queue_len,
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+ adapter->rx_queue.queue_addr,
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+ adapter->rx_queue.queue_dma);
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adapter->rx_queue.queue_addr = NULL;
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}
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@@ -556,10 +551,13 @@ static int ibmveth_open(struct net_devic
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goto err_out;
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}
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+ dev = &adapter->vdev->dev;
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+
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adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) *
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rxq_entries;
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- adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len,
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- GFP_KERNEL);
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+ adapter->rx_queue.queue_addr =
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+ dma_alloc_coherent(dev, adapter->rx_queue.queue_len,
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+ &adapter->rx_queue.queue_dma, GFP_KERNEL);
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if (!adapter->rx_queue.queue_addr) {
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netdev_err(netdev, "unable to allocate rx queue pages\n");
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@@ -567,19 +565,13 @@ static int ibmveth_open(struct net_devic
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goto err_out;
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}
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- dev = &adapter->vdev->dev;
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-
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adapter->buffer_list_dma = dma_map_single(dev,
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adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
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adapter->filter_list_dma = dma_map_single(dev,
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adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
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- adapter->rx_queue.queue_dma = dma_map_single(dev,
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- adapter->rx_queue.queue_addr,
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- adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
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if ((dma_mapping_error(dev, adapter->buffer_list_dma)) ||
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- (dma_mapping_error(dev, adapter->filter_list_dma)) ||
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- (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) {
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+ (dma_mapping_error(dev, adapter->filter_list_dma))) {
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netdev_err(netdev, "unable to map filter or buffer list "
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"pages\n");
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rc = -ENOMEM;
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--
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To unsubscribe from this list: send the line "unsubscribe netdev" in
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the body of a message to majordomo@vger.kernel.org
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More majordomo info at http://vger.kernel.org/majordomo-info.html
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14
kernel.spec
14
kernel.spec
@ -62,7 +62,7 @@ Summary: The Linux kernel
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# For non-released -rc kernels, this will be appended after the rcX and
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# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
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#
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%global baserelease 2
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%global baserelease 1
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%global fedora_build %{baserelease}
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# base_sublevel is the kernel version we're starting with and patching
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@ -95,7 +95,7 @@ Summary: The Linux kernel
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# The rc snapshot level
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%define rcrev 4
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# The git snapshot level
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%define gitrev 0
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%define gitrev 1
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# Set rpm version accordingly
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%define rpmversion 3.%{upstream_sublevel}.0
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%endif
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@ -756,6 +756,9 @@ Patch22066: virtio-scsi-Initialize-scatterlist-structure.patch
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#rhbz 846037
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Patch22067: selinux-Fix-sel_netnode_insert-suspicious-rcu-dereference.patch
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#rhbz 852842
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Patch22068: ibmveth-Fix-alignment-of-rx-queue-bug.patch
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Patch30000: 0001-ALSA-snd-usb-Fix-URB-cancellation-at-stream-start.patch
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# END OF PATCH DEFINITIONS
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@ -1457,6 +1460,9 @@ ApplyPatch virtio-scsi-Initialize-scatterlist-structure.patch
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#rhbz 846037
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ApplyPatch selinux-Fix-sel_netnode_insert-suspicious-rcu-dereference.patch
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#rhbz 852842
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ApplyPatch ibmveth-Fix-alignment-of-rx-queue-bug.patch
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ApplyPatch 0001-ALSA-snd-usb-Fix-URB-cancellation-at-stream-start.patch
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# END OF PATCH APPLICATIONS
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@ -2321,6 +2327,10 @@ fi
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# ||----w |
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# || ||
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%changelog
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* Wed Sep 05 2012 Josh Boyer <jwboyer@redhat.com> - 3.6.0-0.rc4.git1.1
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- Linux v3.6-rc4-53-g5b716ac
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- Add patch to fix ibmveth issue from Santiago Leon (rhbz 852842)
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* Wed Sep 05 2012 Josh Boyer <jwboyer@redhat.com> - 3.6.0-0.rc4.git0.2
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- Reenable debugging options.
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