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.
SRU justification:
Impact: When starting up the Areca 1220 PCIe card webconfig tool the
system locks up with:
BUG: scheduling while atomic: archhttp64/ 7146/0x10000000 01
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: 7410877b5b24f4b 29ef8521d1
69e562c234440fb
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