From: Sreekanth Reddy sreekanth.reddy@broadcom.com
Commit d309ae07327d19ce613629a0535e9a11a8ff5127 upstream.
Currently the driver allocates memory for ReplyPostFree queues in chunks of 16. In resource constrained environments--such as VM with 1 GB RAM and 2 CPUs--memory allocation for ReplyPostFree pools may fail because the driver tries to allocate a memory for 16 ReplyPostFree queues even though the actual number needed is 2.
Change the driver to allocate memory for only the actual number of queues needed if the ReplyPostFree queue count is less than 16.
Link: https://lore.kernel.org/r/20210201141522.25363-1-sreekanth.reddy@broadcom.co... Signed-off-by: Sreekanth Reddy sreekanth.reddy@broadcom.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Integrated-by: Siyu Zhang siyu.zhang@windriver.com --- drivers/scsi/mpt3sas/mpt3sas_base.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index f4d19b0bec23..81ff49757495 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -5642,7 +5642,8 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc) reply_post_free_sz = ioc->reply_post_queue_depth * sizeof(Mpi2DefaultReplyDescriptor_t); rdpq_sz = reply_post_free_sz * RDPQ_MAX_INDEX_IN_ONE_CHUNK; - if (_base_is_controller_msix_enabled(ioc) && !ioc->rdpq_array_enable) + if ((_base_is_controller_msix_enabled(ioc) && !ioc->rdpq_array_enable) + || (ioc->reply_queue_count < RDPQ_MAX_INDEX_IN_ONE_CHUNK)) rdpq_sz = reply_post_free_sz * ioc->reply_queue_count; ret = base_alloc_rdpq_dma_pool(ioc, rdpq_sz); if (ret == -EAGAIN) {