diff options
author | 2017-03-08 23:13:28 -0800 | |
---|---|---|
committer | 2017-03-08 23:36:15 -0800 | |
commit | 52f993b8e89487ec9ee15a7fb4979e0f09a45b27 (patch) | |
tree | d65304486afe0bea4a311c783c0d72791c8c0aa2 /kernel/drivers/mmc/host/sh_mmcif.c | |
parent | c189ccac5702322ed843fe17057035b7222a59b6 (diff) |
Upgrade to 4.4.50-rt62
The current kernel is based on rt kernel v4.4.6-rt14. We will upgrade it
to 4.4.50-rt62.
The command to achieve it is:
a) Clone a git repo from
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git
b) Get the diff between this two changesets:
git diff 640eca2901f3435e616157b11379d3223a44b391
705619beeea1b0b48219a683fd1a901a86fdaf5e
where the two commits are:
[yjiang5@jnakajim-build linux-stable-rt]$ git show --oneline --name-only
640eca2901f3435e616157b11379d3223a44b391
640eca2901f3 v4.4.6-rt14
localversion-rt
[yjiang5@jnakajim-build linux-stable-rt]$ git show --oneline --name-only
705619beeea1b0b48219a683fd1a901a86fdaf5e
705619beeea1 Linux 4.4.50-rt62
localversion-rt
c) One patch has been backported thus revert the patch before applying.
filterdiff -p1 -x scripts/package/Makefile
~/tmp/v4.4.6-rt14-4.4.50-rt62.diff |patch -p1 --dry-run
Upstream status: backport
Change-Id: I244d57a32f6066e5a5b9915f9fbf99e7bbca6e01
Signed-off-by: Yunhong Jiang <yunhong.jiang@linux.intel.com>
Diffstat (limited to 'kernel/drivers/mmc/host/sh_mmcif.c')
-rw-r--r-- | kernel/drivers/mmc/host/sh_mmcif.c | 84 |
1 files changed, 38 insertions, 46 deletions
diff --git a/kernel/drivers/mmc/host/sh_mmcif.c b/kernel/drivers/mmc/host/sh_mmcif.c index ad9ffea7d..6234eab38 100644 --- a/kernel/drivers/mmc/host/sh_mmcif.c +++ b/kernel/drivers/mmc/host/sh_mmcif.c @@ -397,38 +397,26 @@ static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host) } static struct dma_chan * -sh_mmcif_request_dma_one(struct sh_mmcif_host *host, - struct sh_mmcif_plat_data *pdata, - enum dma_transfer_direction direction) +sh_mmcif_request_dma_pdata(struct sh_mmcif_host *host, uintptr_t slave_id) { - struct dma_slave_config cfg = { 0, }; - struct dma_chan *chan; - void *slave_data = NULL; - struct resource *res; - struct device *dev = sh_mmcif_host_to_dev(host); dma_cap_mask_t mask; - int ret; dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); + if (slave_id <= 0) + return NULL; - if (pdata) - slave_data = direction == DMA_MEM_TO_DEV ? - (void *)pdata->slave_id_tx : - (void *)pdata->slave_id_rx; - - chan = dma_request_slave_channel_compat(mask, shdma_chan_filter, - slave_data, dev, - direction == DMA_MEM_TO_DEV ? "tx" : "rx"); - - dev_dbg(dev, "%s: %s: got channel %p\n", __func__, - direction == DMA_MEM_TO_DEV ? "TX" : "RX", chan); + return dma_request_channel(mask, shdma_chan_filter, (void *)slave_id); +} - if (!chan) - return NULL; +static int sh_mmcif_dma_slave_config(struct sh_mmcif_host *host, + struct dma_chan *chan, + enum dma_transfer_direction direction) +{ + struct resource *res; + struct dma_slave_config cfg = { 0, }; res = platform_get_resource(host->pd, IORESOURCE_MEM, 0); - cfg.direction = direction; if (direction == DMA_DEV_TO_MEM) { @@ -439,38 +427,42 @@ sh_mmcif_request_dma_one(struct sh_mmcif_host *host, cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; } - ret = dmaengine_slave_config(chan, &cfg); - if (ret < 0) { - dma_release_channel(chan); - return NULL; - } - - return chan; + return dmaengine_slave_config(chan, &cfg); } -static void sh_mmcif_request_dma(struct sh_mmcif_host *host, - struct sh_mmcif_plat_data *pdata) +static void sh_mmcif_request_dma(struct sh_mmcif_host *host) { struct device *dev = sh_mmcif_host_to_dev(host); host->dma_active = false; - if (pdata) { - if (pdata->slave_id_tx <= 0 || pdata->slave_id_rx <= 0) - return; - } else if (!dev->of_node) { - return; + /* We can only either use DMA for both Tx and Rx or not use it at all */ + if (IS_ENABLED(CONFIG_SUPERH) && dev->platform_data) { + struct sh_mmcif_plat_data *pdata = dev->platform_data; + + host->chan_tx = sh_mmcif_request_dma_pdata(host, + pdata->slave_id_tx); + host->chan_rx = sh_mmcif_request_dma_pdata(host, + pdata->slave_id_rx); + } else { + host->chan_tx = dma_request_slave_channel(dev, "tx"); + host->chan_rx = dma_request_slave_channel(dev, "rx"); } + dev_dbg(dev, "%s: got channel TX %p RX %p\n", __func__, host->chan_tx, + host->chan_rx); - /* We can only either use DMA for both Tx and Rx or not use it at all */ - host->chan_tx = sh_mmcif_request_dma_one(host, pdata, DMA_MEM_TO_DEV); - if (!host->chan_tx) - return; + if (!host->chan_tx || !host->chan_rx || + sh_mmcif_dma_slave_config(host, host->chan_tx, DMA_MEM_TO_DEV) || + sh_mmcif_dma_slave_config(host, host->chan_rx, DMA_DEV_TO_MEM)) + goto error; - host->chan_rx = sh_mmcif_request_dma_one(host, pdata, DMA_DEV_TO_MEM); - if (!host->chan_rx) { + return; + +error: + if (host->chan_tx) dma_release_channel(host->chan_tx); - host->chan_tx = NULL; - } + if (host->chan_rx) + dma_release_channel(host->chan_rx); + host->chan_tx = host->chan_rx = NULL; } static void sh_mmcif_release_dma(struct sh_mmcif_host *host) @@ -1102,7 +1094,7 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (ios->power_mode == MMC_POWER_UP) { if (!host->card_present) { /* See if we also get DMA */ - sh_mmcif_request_dma(host, dev->platform_data); + sh_mmcif_request_dma(host); host->card_present = true; } sh_mmcif_set_power(host, ios); |