Hello.
Manuel Lauss wrote:
Please apply this patch, as it fixes an oops when MMC-DMA and network
traffic are active at the same time. This seems to be a 2.6.27-only thing;
the current au1xmmc code (minus the polling parts) works fine on 2.6.26.
---
Raise the DMA block size limit from 2048 bytes to the maximum supported
by the DMA controllers on the chip (128kB on Au1100, 4MB on Au1200).
This gives a small performance boost and apparently fixes an oops when
MMC-DMA and network traffic are active at the same time.
Signed-off-by: Manuel Lauss <mano@xxxxxxxxxxxxxxxxxxxxxxx>
[...]
diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c
index 99b2091..dd414f1 100644
--- a/drivers/mmc/host/au1xmmc.c
+++ b/drivers/mmc/host/au1xmmc.c
@@ -61,7 +61,13 @@
/* Hardware definitions */
#define AU1XMMC_DESCRIPTOR_COUNT 1
-#define AU1XMMC_DESCRIPTOR_SIZE 2048
+
+/* max DMA seg size: 64kB on Au1100, 4MB on Au1200 */
So, it's 64 or 128 KB? KB since k prefix usualy means decimal kilo... :-)
WBR, Sergei
