the eHCA driver registers a MR for all of kernel memory, but makes the assumption that valid memory exists at KERNELBASE. This assumption may not be true in the case of a relocatable kernel, so use KERNELBASE + PHYSICAL_START to get the true beginning of usable kernel memory.
This patch depends on the earlier patch which exports the necessary symbol for PHYSICAL_START in a relocatable kernel. cc: Joachim Fenkes <[email protected]> cc: Christoph Raisch <[email protected]> cc: Hoan-Ham Hguyen <[email protected]> Signed-off-by: Sonny Rao <[email protected]> Index: linux-2.6/drivers/infiniband/hw/ehca/ehca_mrmw.c =================================================================== --- linux-2.6.orig/drivers/infiniband/hw/ehca/ehca_mrmw.c 2010-08-09 22:16:57.688652613 -0500 +++ linux-2.6/drivers/infiniband/hw/ehca/ehca_mrmw.c 2010-08-19 22:53:03.451507146 -0500 @@ -171,7 +171,7 @@ } ret = ehca_reg_maxmr(shca, e_maxmr, - (void *)ehca_map_vaddr((void *)KERNELBASE), + (void *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START)), mr_access_flags, e_pd, &e_maxmr->ib.ib_mr.lkey, &e_maxmr->ib.ib_mr.rkey); @@ -1636,7 +1636,7 @@ /* register internal max-MR on HCA */ size_maxmr = ehca_mr_len; - iova_start = (u64 *)ehca_map_vaddr((void *)KERNELBASE); + iova_start = (u64 *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START)); ib_pbuf.addr = 0; ib_pbuf.size = size_maxmr; num_kpages = NUM_CHUNKS(((u64)iova_start % PAGE_SIZE) + size_maxmr, @@ -2209,7 +2209,7 @@ { /* a MR is treated as max-MR only if it fits following: */ if ((size == ehca_mr_len) && - (iova_start == (void *)ehca_map_vaddr((void *)KERNELBASE))) { + (iova_start == (void *)ehca_map_vaddr((void *)(KERNELBASE + PHYSICAL_START)))) { ehca_gen_dbg("this is a max-MR"); return 1; } else -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
