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IB/ehca: Fix driver on relocatable kernel 

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.

cc: Joachim Fenkes <fenkes@de.ibm.com>
cc: Christoph Raisch <raisch@de.ibm.com>
cc: Hoan-Ham Hguyen <hnguyen@de.ibm.com>
Signed-off-by: Sonny Rao <sonnyrao@us.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Sonny Rao 2010-08-20 04:10:19 +00:00 committed by Roland Dreier
parent 252a52aa4f
commit 625fbd3a36
1 changed files with 3 additions and 3 deletions
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6
drivers/infiniband/hw/ehca/ehca_mrmw.c
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@ -171,7 +171,7 @@ struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
}
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 @@ int ehca_reg_internal_maxmr(
/* 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 @@ int ehca_mr_is_maxmr(u64 size,
{
/* 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