On Tue, May 03, 2011 at 01:20:25PM +0300, Kalle Valo wrote: > I noticed today a crash when removing iwlagn module. I can see the > crash everytime on my lenovo x201 (x86 64bit, i5) with this wireless > chip: > > [ 19.484551] iwlagn 0000:02:00.0: Detected Intel(R) Centrino(R) > Ultimate-N 6300 AGN, REV=0x74 > > As I'm travelling I only have two bad quality screenshots and 40 MB > video of the crash :) From the stacktrace it looks that this is iommu > related: > > http://www.adurom.com/~kvalo/tmp/iwlagn/rmmod-iommu-crash/1.png > http://www.adurom.com/~kvalo/tmp/iwlagn/rmmod-iommu-crash/2.png > > This is a new laptop and most likely I haven't removed iwlagn module > before. So this shouldn't be a regression. We can not exclude iwlagn problem only triggered with intel iommu, because problem does not happen with other modules, or does it? Except test patch pointed by Johannes, I suggest turning on CONFIG_DMA_API_DEBUG and test with intel_iommu=on and intel_iommu=off. Stanislaw -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
