The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 4ee7dde4c777f14cb0f98dd201491bf6cc15899b Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Date: Mon, 23 Sep 2019 12:08:09 +0200
Subject: [PATCH] mmc: sdhci: Let drivers define their DMA mask
Add host operation ->set_dma_mask() so that drivers can define their own
DMA masks.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Tested-by: Nicolin Chen <nicoleotsuka@xxxxxxxxx>
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v4.15 +
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 922a5b594c5e..b056400e34b1 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3781,18 +3781,14 @@ int sdhci_setup_host(struct sdhci_host *host)
host->flags &= ~SDHCI_USE_ADMA;
}
- /*
- * It is assumed that a 64-bit capable device has set a 64-bit DMA mask
- * and *must* do 64-bit DMA. A driver has the opportunity to change
- * that during the first call to ->enable_dma(). Similarly
- * SDHCI_QUIRK2_BROKEN_64_BIT_DMA must be left to the drivers to
- * implement.
- */
if (sdhci_can_64bit_dma(host))
host->flags |= SDHCI_USE_64_BIT_DMA;
if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
- ret = sdhci_set_dma_mask(host);
+ if (host->ops->set_dma_mask)
+ ret = host->ops->set_dma_mask(host);
+ else
+ ret = sdhci_set_dma_mask(host);
if (!ret && host->ops->enable_dma)
ret = host->ops->enable_dma(host);
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index a29c4cd2d92e..0ed3e0eaef5f 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -622,6 +622,7 @@ struct sdhci_ops {
u32 (*irq)(struct sdhci_host *host, u32 intmask);
+ int (*set_dma_mask)(struct sdhci_host *host);
int (*enable_dma)(struct sdhci_host *host);
unsigned int (*get_max_clock)(struct sdhci_host *host);
unsigned int (*get_min_clock)(struct sdhci_host *host);
