diff options
| author | Adrian Hunter <adrian.hunter@nokia.com> | 2009-09-23 01:44:57 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 16:39:35 +0200 |
| commit | 23050103c21d4d5314b7c978187e6e4305a00495 (patch) | |
| tree | 38bd4d614faf6369962844fcadfe8925681ae4eb /drivers/mmc/host/omap_hsmmc.c | |
| parent | omap_hsmmc: clear interrupt status after init sequence (diff) | |
| download | linux-23050103c21d4d5314b7c978187e6e4305a00495.tar.xz linux-23050103c21d4d5314b7c978187e6e4305a00495.zip | |
omap_hsmmc: cater for weird CMD6 behaviour
Sometimes the controller unexpectedly produces a TC (transfer complete)
interrupt before the CC (command complete) interrupt for command 6
(SWITCH). This is a problem because the CC interrupt can get mixed up
with the next request. Add a hack for CMD6.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Denis Karpov <ext-denis.2.karpov@nokia.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Philip Langdale <philipl@overt.org>
Cc: "Madhusudhan" <madhu.cr@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc/host/omap_hsmmc.c')
| -rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 325cf60c65e5..f9ed5e23f145 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -481,6 +481,13 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data) if (!data) { struct mmc_request *mrq = host->mrq; + /* TC before CC from CMD6 - don't know why, but it happens */ + if (host->cmd && host->cmd->opcode == 6 && + host->response_busy) { + host->response_busy = 0; + return; + } + host->mrq = NULL; mmc_request_done(host->mmc, mrq); return; |