This is a note to let you know that I've just added the patch titled
mmc: omap_hsmmc: Fix DTO and DCRC handling
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-omap_hsmmc-fix-dto-and-dcrc-handling.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 408806f740497c5d71f9c305b3d6aad260ff186d Mon Sep 17 00:00:00 2001
From: Kishon Vijay Abraham I <kishon@xxxxxx>
Date: Tue, 16 Jun 2015 16:07:17 +0530
Subject: mmc: omap_hsmmc: Fix DTO and DCRC handling
From: Kishon Vijay Abraham I <kishon@xxxxxx>
commit 408806f740497c5d71f9c305b3d6aad260ff186d upstream.
DTO/DCRC errors were not being informed to the mmc core since
commit ae4bf788ee9b ("mmc: omap_hsmmc: consolidate error report handling of
HSMMC IRQ"). This commit made sure 'end_trans' is never set on DTO/DCRC
errors. This is because after this commit 'host->data' is checked after
it has been cleared to NULL by omap_hsmmc_dma_cleanup().
Because 'end_trans' is never set, omap_hsmmc_xfer_done() is never invoked
making core layer not to be aware of DTO/DCRC errors. Because of this
any command invoked after DTO/DCRC error leads to a hang.
Fix this by checking for 'host->data' before it is actually cleared.
Fixes: ae4bf788ee9b ("mmc: omap_hsmmc: consolidate error report handling of
HSMMC IRQ")
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Signed-off-by: Vignesh R <vigneshr@xxxxxx>
Tested-by: Andreas Fenkart <afenkart@xxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/omap_hsmmc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1062,6 +1062,10 @@ static void omap_hsmmc_do_irq(struct oma
if (status & (CTO_EN | CCRC_EN))
end_cmd = 1;
+ if (host->data || host->response_busy) {
+ end_trans = !end_cmd;
+ host->response_busy = 0;
+ }
if (status & (CTO_EN | DTO_EN))
hsmmc_command_incomplete(host, -ETIMEDOUT, end_cmd);
else if (status & (CCRC_EN | DCRC_EN))
@@ -1081,10 +1085,6 @@ static void omap_hsmmc_do_irq(struct oma
}
dev_dbg(mmc_dev(host->mmc), "AC12 err: 0x%x\n", ac12);
}
- if (host->data || host->response_busy) {
- end_trans = !end_cmd;
- host->response_busy = 0;
- }
}
OMAP_HSMMC_WRITE(host->base, STAT, status);
Patches currently in stable-queue which might be from kishon@xxxxxx are
queue-4.1/mmc-omap_hsmmc-fix-dto-and-dcrc-handling.patch
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