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mmc: core: sd:

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fix sd physical layer version 3.0 or above max AU from size 4MB (0x9) to 64MB (0xF)
This commit is contained in:
lin tao
2013-11-01 15:19:13 +08:00
parent 1f73362ddd
commit 90f82a4fe7
1 changed files with 3 additions and 2 deletions
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5
drivers/mmc/core/sd.c
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@@ -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)) {
@@ -239,13 +239,14 @@ static int mmc_read_ssr(struct mmc_card *card)
for (i = 0; i < 16; i++)
ssr[i] = be32_to_cpu(ssr[i]);
max_au = card->scr.sda_spec3 ? 0xF : 0x9;
/*
* 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) { //Modifyed by xbw at 2013-02-28
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);