From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alamy Liu Subject: [PATCH] mmc: cqhci: data size depending on queue depth Date: Tue, 15 Jan 2019 11:13:50 -0800 Message-ID: <20190115191356.32714-1-alamy.liu@gmail.com> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Venkat Gopalakrishnan Cc: Ulf Hansson , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-mmc@vger.kernel.org CQE_DCMD is not necessary to be enabled when CQE is enabled. (Software could halt CQE to send command, or via DCMD) In the case that CQE_DCMD is not enabled, it still needs to allocate space for data transfer. For instance: CQE_DCMD is enabled: 32 slots space CQE_DCMD is disabled: 31 slots space (is good enough) Signed-off-by: Alamy Liu --- drivers/mmc/host/cqhci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/host/cqhci.c b/drivers/mmc/host/cqhci.c index 4cc7863c13..974997b6cb 100644 --- a/drivers/mmc/host/cqhci.c +++ b/drivers/mmc/host/cqhci.c @@ -202,7 +202,7 @@ static int cqhci_host_alloc_tdl(struct cqhci_host *cq_host) cq_host->desc_size = cq_host->slot_sz * cq_host->num_slots; cq_host->data_size = cq_host->trans_desc_len * cq_host->mmc->max_segs * - (cq_host->num_slots - 1); + cq_host->mmc->cqe_qdepth; pr_debug("%s: cqhci: desc_size: %zu data_sz: %zu slot-sz: %d\n", mmc_hostname(cq_host->mmc), cq_host->desc_size, cq_host->data_size, -- 2.17.1