Linux kernel 3.4.4 and 3.4.7 panic
I've character driver for PCIe based DMA and it is working fine till kernel version number 3.3.7 on fedora 16.
But when I updated my kernel to 3.4.4, I am getting oops message while doing memory mapping for DMA. Oops messages are coming at function dma_map_single. The message which I am getting is:
Kernel BUG at lib/iommu-helper.c:13
Invalid Opcode and then Stack Dump.....
Same thing happening on kernel 3.4.7.
Any help will be highly appreciated.
Thanks in advance.