[Qemu-devel] [PATCH v3 2/4] sd: sdhci: mask transfer mode register value

[P J P]

From: Prasad J Pandit <address@hidden>

In SDHCI protocol, the transfer mode register is defined
to be of 6 bits. Mask its value with '0x0037' so that an
invalid value couldn't be assigned.

Signed-off-by: Prasad J Pandit <address@hidden>
---
 hw/sd/sdhci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Update: mask s->trnmod register value
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg02354.html

diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
index a9c744b..0307b8c 100644
--- a/hw/sd/sdhci.c
+++ b/hw/sd/sdhci.c
@@ -1050,7 +1050,7 @@ sdhci_write(void *opaque, hwaddr offset, uint64_t val, 
unsigned size)
         if (!(s->capareg & SDHC_CAN_DO_DMA)) {
             value &= ~SDHC_TRNS_DMA;
         }
-        MASKED_WRITE(s->trnmod, mask, value);
+        MASKED_WRITE(s->trnmod, mask, value & 0x0037);
         MASKED_WRITE(s->cmdreg, mask >> 16, value >> 16);
 
         /* Writing to the upper byte of CMDREG triggers SD command generation 
*/
-- 
2.9.3