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mmc: core: Calculate the discard arg only once

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In MMC, the discard arg is a read-only ext_csd parameter - set it once
on card init. To be consistent, do that for SD as well even though its
discard arg is always 0x0.

Signed-off-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Avri Altman 2019-02-06 13:28:05 +02:00 • committed by Ulf Hansson
parent a2b760a601
commit 01904ff776
6 changed files with 21 additions and 11 deletions
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1
include/linux/mmc/card.h
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@ -277,6 +277,7 @@ struct mmc_card {
unsigned int erase_shift; /* if erase unit is power 2 */
unsigned int pref_erase; /* in sectors */
unsigned int eg_boundary; /* don't cross erase-group boundaries */
unsigned int erase_arg; /* erase / trim / discard */
u8 erased_byte; /* value of erased bytes */
u32 raw_cid[4]; /* raw card CID */

5
include/linux/mmc/sd.h
View file

@ -91,4 +91,9 @@
#define SD_SWITCH_ACCESS_DEF 0
#define SD_SWITCH_ACCESS_HS 1
/*
* Erase/discard
*/
#define SD_ERASE_ARG 0x00000000
#endif /* LINUX_MMC_SD_H */