evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

mmc: core: fix reading the bkops status from card

Browse source 
The bkops status is indicated by the bit 0 and 1 of the
246th byte of the ext_csd register.
The current code doesn't ignore the rest of the byte.

Fix this by extracting the bit 0 and 1 only
for the current bkops urgency.

The exception level is defined by the least significant
nibble of 54th byte in the ext_csd register. The current
code doesn't ignore the rest of the byte.

Fix this by extracting the nibble(LSB) for exception status.

Change-Id: Ic90fe26a676ae7dd2063e17bc3771db83605f4dc
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
[subhashj@codeaurora.org: fixed trivial merge conflicts]
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
This commit is contained in:
Asutosh Das 2016-04-21 14:15:15 +05:30 • committed by Kyle Yan
parent 240bee3ffd
commit 20e43d0532
2 changed files with 9 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/mmc/core/core.c
View file

@ -1871,8 +1871,14 @@ int mmc_read_bkops_status(struct mmc_card *card)
if (err)
return err;
card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS] &
MMC_BKOPS_URGENCY_MASK;
card->ext_csd.raw_exception_status =
ext_csd[EXT_CSD_EXP_EVENTS_STATUS] & (EXT_CSD_URGENT_BKOPS |
EXT_CSD_DYNCAP_NEEDED |
EXT_CSD_SYSPOOL_EXHAUSTED
| EXT_CSD_PACKED_FAILURE);
kfree(ext_csd);
return 0;
}

1
include/linux/mmc/card.h
View file

@ -128,6 +128,7 @@ struct mmc_ext_csd {
u8 raw_pwr_cl_ddr_52_360; /* 239 */
u8 raw_pwr_cl_ddr_200_360; /* 253 */
u8 cache_flush_policy; /* 240 */
#define MMC_BKOPS_URGENCY_MASK 0x3
u8 raw_bkops_status; /* 246 */
u8 raw_sectors[4]; /* 212 - 4 bytes */
u8 cmdq_depth; /* 307 */