bcm2835-sdhost: Clear HBLC for PIO mode

Also update pio_limit default in overlay README.
raspberrypi · Jul 3, 2015 · f72606a · f72606a
1 parent 1674fcd
commit f72606a
Show file tree

Hide file tree

Showing 2 changed files with 2 additions and 3 deletions.
diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
@@ -441,7 +441,7 @@ Params: overclock_50             Clock (in MHz) to use when the MMC framework
         force_pio                Disable DMA support (default off)
 
         pio_limit                Number of blocks above which to use DMA
-                                 (default 2)
+                                 (default 1)
 
         debug                    Enable debug output (default off)
 

diff --git a/drivers/mmc/host/bcm2835-sdhost.c b/drivers/mmc/host/bcm2835-sdhost.c
@@ -699,8 +699,7 @@ static void bcm2835_sdhost_prepare_data(struct bcm2835_host *host, struct mmc_co
 	bcm2835_sdhost_set_transfer_irqs(host);
 
 	bcm2835_sdhost_write(host, data->blksz, SDHBCT);
-	if (host->use_dma)
-		bcm2835_sdhost_write(host, data->blocks, SDHBLC);
+	bcm2835_sdhost_write(host, host->use_dma ? data->blocks : 0, SDHBLC);
 
 	BUG_ON(!host->data);
 }