From 9445d7ba60d374ef7e86410a2add103b75064ad5 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Date: Wed, 22 Jun 2016 13:42:17 +0200
Subject: [PATCH 4/5] mmc: bcm2835-sdhost: reset tweaks. [fixup]
Patch-mainline: Submitted, http://www.spinics.net/lists/linux-mmc/msg37743.html
References: bsc#983145
Kill any pending stuff before calling reset_internal(), so there
shouldn't be any completion callbacks interfering. This allows
to call reset_internal without lock, which in turn allows to
turn the mdelay calls into msleep calls. Also adjust the time
from 10ms to 20ms as checkpatch warns about the 10ms.
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
[mmarek: Use the non-synchronized dmaengine API in SLE12-SP2]
Acked-by: Michal Marek <mmarek@suse.com>
---
drivers/mmc/host/bcm2835-sdhost.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/bcm2835-sdhost.c b/drivers/mmc/host/bcm2835-sdhost.c
index 965f88647634..d2a0a77870fe 100644
--- a/drivers/mmc/host/bcm2835-sdhost.c
+++ b/drivers/mmc/host/bcm2835-sdhost.c
@@ -321,9 +321,9 @@ static void bcm2835_sdhost_reset_internal(struct bcm2835_host *host)
temp |= (FIFO_READ_THRESHOLD << SDEDM_READ_THRESHOLD_SHIFT) |
(FIFO_WRITE_THRESHOLD << SDEDM_WRITE_THRESHOLD_SHIFT);
bcm2835_sdhost_write(host, temp, SDEDM);
- mdelay(10);
+ msleep(20);
bcm2835_sdhost_set_power(host, true);
- mdelay(10);
+ msleep(20);
host->clock = 0;
bcm2835_sdhost_write(host, host->hcfg, SDHCFG);
bcm2835_sdhost_write(host, host->cdiv, SDCDIV);
@@ -334,9 +334,10 @@ static void bcm2835_sdhost_reset(struct mmc_host *mmc)
struct bcm2835_host *host = mmc_priv(mmc);
unsigned long flags;
- spin_lock_irqsave(&host->lock, flags);
+ if (host->dma_chan)
+ dmaengine_terminate_all(host->dma_chan);
+ tasklet_kill(&host->finish_tasklet);
bcm2835_sdhost_reset_internal(host);
- spin_unlock_irqrestore(&host->lock, flags);
}
static void bcm2835_sdhost_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
--
2.6.2