Since SD Physical Layer specification V3.0, AU_SIZE is supported up to 0xf.
So If SD-card is supported v3.0, then max_au should be 0xf.
Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/mmc/core/sd.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 176d125..aa5013f 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -215,7 +215,7 @@ static int mmc_decode_scr(struct mmc_card *card)
static int mmc_read_ssr(struct mmc_card *card)
{
unsigned int au, es, et, eo;
- int err, i;
+ int err, i, max_au;
u32 *ssr;
if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
@@ -239,12 +239,18 @@ static int mmc_read_ssr(struct mmc_card *card)
for (i = 0; i < 16; i++)
ssr[i] = be32_to_cpu(ssr[i]);
+ /* The value of maximum au_size is supported 0xF since SD3.0 */
+ if (card->scr.sda_spec3)
+ max_au = 0xf;
+ else
+ max_au = 9;
+
/*
* UNSTUFF_BITS only works with four u32s so we have to offset the
* bitfield positions accordingly.
*/
au = UNSTUFF_BITS(ssr, 428 - 384, 4);
- if (au > 0 && au <= 9) {
+ if (au > 0 && au <= max_au) {
card->ssr.au = 1 << (au + 4);
es = UNSTUFF_BITS(ssr, 408 - 384, 16);
et = UNSTUFF_BITS(ssr, 402 - 384, 6);
--
1.7.9.5
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