[PATCH] hw/sd/sdcard: Fix calculation of size when using eMMC boot partitions

[Jan Luebbe <jlu@pengutronix.de>]

The sd_bootpart_offset() function calculates the *runtime* offset which
changes as the guest switches between accessing the main user data area
and the boot partitions by writing to the EXT_CSD_PART_CONFIG_ACC_MASK
bits, so it shouldn't be used to calculate the main user data area size.

Instead, subtract the boot_part_size directly (twice, as there are two
identical boot partitions defined by the eMMC spec).

Suggested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
---
 hw/sd/sd.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 2d3467c3d956..8430d5ae361c 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -826,7 +826,9 @@ static void sd_reset(DeviceState *dev)
         sect = 0;
     }
     size = sect << HWBLOCK_SHIFT;
-    size -= sd_bootpart_offset(sd);
+    if (sd_is_emmc(sd)) {
+        size -= sd->boot_part_size * 2;
+    }
 
     sect = sd_addr_to_wpnum(size) + 1;
 
-- 
2.39.5