SRU request for LP#235889

Tim Gardner tcanonical at tpi.com
Mon Jun 23 12:41:12 UTC 2008


Colin Ian King wrote:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/235889
> 
> SRU justification:
> 
> Impact: When starting up the Areca 1220 PCIe card webconfig tool the
> system locks up with:
> 
> BUG: scheduling while atomic: archhttp64/7146/0x1000000001
> BUG: soft lockup - CPU#0 stuck for 11s! [archhttp64:7146]
> BUG: soft lockup - CPU#0 stuck for 11s! [archhttp64:7146]
> 
> Fix: Softlockup is caused by arcmsr_iop_message_xfer() being
> called from atomic context under the queuecommand scsi_host_template
> handler. The current GFP_KERNEL|GFP_DMA flags are wrong: firstly we are
> in atomic context, secondly this memory is not used for DMA. The patch
> attached corrects these issues.
> 
> Patch from upstream commit:
> 69e562c234440fb7410877b5b24f4b29ef8521d1
> 
> Testcase: Starting up Areca card with webconfig tool, system will lockup
> without the patch.
> 
> Tested and verified OK by user from PPA kernel:
> 
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/235889/comments/22
> 
> Patch attached
> 
> 

ACK

-- 
Tim Gardner tim.gardner at ubuntu.com




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