Da Xue the upstream is available in Precise+ as per
http://kernel.ubuntu.com/git?p=ubuntu%2Fubuntu-precise.git&a=search&h=HEAD&st=commit&s=rtlwifi%3A+Add+missing+DMA+buffer+unmapping+for+PCI+drivers
. Hence, this bug report is being closed due to your last comment
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/961618/comments/18
regarding this being fixed with the patch. For future reference you can manage
the status of your own bugs by clicking on the current status in the yellow
line and then choosing a new status in the revealed drop down box. You can
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** Changed in: linux (Ubuntu)
Status: Triaged => Invalid
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https://bugs.launchpad.net/bugs/961618
Title:
RTL8192SE DMA: Out of SW-IOMMU space for 178 bytes at device
0000:07:00.0
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