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| author |   Daniel Lichtenberger <daniel.lichtenberger@gmail.com> | 2010-10-28 23:20:12 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2010-11-09 14:05:23 -0800 |
| commit | 43f88d530ec656d9b556fb0d127b30757b1c3d35 (patch) | |
| tree | ba8eb4e133fff45d25299f345223570409f2b6d4 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | staging: vt6656: implement missing brackets (diff) | |
| download | wireguard-linux-43f88d530ec656d9b556fb0d127b30757b1c3d35.tar.xz wireguard-linux-43f88d530ec656d9b556fb0d127b30757b1c3d35.zip | |
Staging: rtl8192e: fix IOMMU memory leak
Unmap the rx buffer before mapping the new one in rtl8192_rx.
Failing to do so quickly exhausts the IOMMU memory during downloads:
[...] DMA: Out of SW-IOMMU space for 9100 bytes at device ...
Using "iommu=off mem=4g" also fixes the problem because
then pci_map_single does not allocate memory.
Tested on my personal laptop with a RTL8192E device. Without this
patch the kernel quickly runs out of IOMMU memory (downloading 5 MB
of data is sufficient to trigger it), with this patch applied
I haven't experienced any issues so far.
Signed-off-by: Daniel Lichtenberger <daniel.lichtenberger@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions