diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-12 12:57:05 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-12 12:57:05 +0200 |
| commit | 4ea07abbfbdadb10bc67c2b78dc2dbfafa4b1009 (patch) | |
| tree | 46517e9473a3845bae5d40900a10bccf68fe91af /drivers/mmc | |
| parent | 60bd7be764e8adada97034b4836875b3e449bd7c (diff) | |
| parent | 4f666675cdff0b986195413215eb062b7da6586f (diff) | |
Merge tag 'mmc-v4.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Ulf writes:
"MMC core:
- Avoid fragile multiblock reads for the last sector in SPI mode
WIFI/SDIO:
- libertas: Fixup suspend sequence for the SDIO card"
* tag 'mmc-v4.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
libertas: call into generic suspend code before turning off power
mmc: block: avoid multiblock reads for the last sector in SPI mode
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/block.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index a0b9102c4c6e1..e201ccb3fda4d 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -1371,6 +1371,16 @@ static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq, if (brq->data.blocks > 1) { /* + * Some SD cards in SPI mode return a CRC error or even lock up + * completely when trying to read the last block using a + * multiblock read command. + */ + if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) && + (blk_rq_pos(req) + blk_rq_sectors(req) == + get_capacity(md->disk))) + brq->data.blocks--; + + /* * After a read error, we redo the request one sector * at a time in order to accurately determine which * sectors can be read successfully. |