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mmc: cqhci: fix space allocated for transfer descriptor 

There is not enough space being allocated when DCMD is disabled.

CQE_DCMD is not necessary to be enabled when CQE is enabled.
(Software could halt CQE to send command)

In the case that CQE_DCMD is not enabled, it still needs to allocate
space for data transfer. For instance:
  CQE_DCMD is enabled:  31 slots space (one slot used by DCMD)
  CQE_DCMD is disabled: 32 slots space

Fixes: a4080225f5 ("mmc: cqhci: support for command queue enabled host")
Signed-off-by: Alamy Liu <alamy.liu@gmail.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Alamy Liu 2019-02-25 11:22:13 -08:00 committed by Ulf Hansson
parent e5723f95d6
commit 27ec9dc17c
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/host/cqhci.c
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@ -201,7 +201,7 @@ 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,