diff options
| author |   Olof Johansson <olof@lixom.net> | 2011-01-01 18:37:32 -0600 |
|---|---|---|
| committer |   Chris Ball <cjb@laptop.org> | 2011-01-08 23:52:23 -0500 |
| commit | 30652aa36b58d57fcc1a0acce51e391bbb6edf5e (patch) | |
| tree | 80743c840e0456381b4e1aea223661eb694a976e /drivers/mmc | |
| parent | mmc: check for > 1 clk_requests when disabling gating (diff) | |
| download | linux-dev-30652aa36b58d57fcc1a0acce51e391bbb6edf5e.tar.xz linux-dev-30652aa36b58d57fcc1a0acce51e391bbb6edf5e.zip | |
mmc: sdhci: add quirk for max len ADMA descriptors
Some controllers misparse segment length 0 as being 0, not 65536. Add
a quirk to deal with it.
Signed-off-by: Olof Johansson <olof@lixom.net>
Reviewed-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index d5febe584b05..9e15f41f87be 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1949,10 +1949,14 @@ int sdhci_add_host(struct sdhci_host *host) * of bytes. When doing hardware scatter/gather, each entry cannot * be larger than 64 KiB though. */ - if (host->flags & SDHCI_USE_ADMA) - mmc->max_seg_size = 65536; - else + if (host->flags & SDHCI_USE_ADMA) { + if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC) + mmc->max_seg_size = 65535; + else + mmc->max_seg_size = 65536; + } else { mmc->max_seg_size = mmc->max_req_size; + } /* * Maximum block size. This varies from controller to controller and |