[PATCH 1/2] mmc: mxcmmc: really configure the DMA on demand
From: Juergen Borleis <hidden>
Date: 2021-07-29 07:29:46
Also in:
lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Ulf Hansson, Linus Torvalds
Calling mxcmci_use_dma(host) is intended for the next transfer only, not for generic detection if DMA is possible. Without this change, the DMA gets never configured and thus, never used. Signed-off-by: Juergen Borleis <redacted> --- drivers/mmc/host/mxcmmc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 2fe6fcd..611f827 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c@@ -834,7 +834,8 @@ static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) else burstlen = 4; - if (mxcmci_use_dma(host) && burstlen != host->burstlen) { + if (host->dma != NULL && burstlen != host->burstlen) { + /* reconfigure DMA on changes only */ host->burstlen = burstlen; ret = mxcmci_setup_dma(mmc); if (ret) {
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2.20.1