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Merge pull request #2875 from Ingenic-community/mmc 

sdio: mmc.c: 防止容量计算过程溢出/Prevent capacity calculation overflow.
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Bernard Xiong 2019-07-20 14:01:42 +08:00 committed by GitHub
parent 367c5abeeb de69a9b500
commit 789fb4a938
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1 changed files with 8 additions and 5 deletions
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components/drivers/sdio/mmc.c
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@ -4,8 +4,8 @@
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2015-06-15 hichard first version
* Date Author Notes
* 2015-06-15 hichard first version
*/
#include <drivers/mmcsd_core.h>
@ -182,6 +182,8 @@ static int mmc_get_ext_csd(struct rt_mmcsd_card *card, rt_uint8_t **new_ext_csd)
*/
static int mmc_parse_ext_csd(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
{
rt_uint64_t card_capacity = 0;
if(card == RT_NULL || ext_csd == RT_NULL)
{
LOG_E("emmc parse ext csd fail, invaild args");
@ -191,9 +193,10 @@ static int mmc_parse_ext_csd(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
card->flags |= CARD_FLAG_HIGHSPEED;
card->hs_max_data_rate = 200000000;
card->card_capacity = *((rt_uint32_t *)&ext_csd[EXT_CSD_SEC_CNT]);
card->card_capacity *= card->card_blksize;
card->card_capacity >>= 10; /* unit:KB */
card_capacity = *((rt_uint32_t *)&ext_csd[EXT_CSD_SEC_CNT]);
card_capacity *= card->card_blksize;
card_capacity >>= 10; /* unit:KB */
card->card_capacity = card_capacity;
LOG_I("emmc card capacity %d KB.", card->card_capacity);
return 0;