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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-30 09:41:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-30 09:41:54 -0700 |
| commit | daea3daaf9d5606735a722677125fe860f86ff41 (patch) | |
| tree | 9c30e74e326bbab0183c6145fd03de30c216e91b /drivers | |
| parent | 1960e8eabcba2749db9443adb2a5d93e4dabf590 (diff) | |
| parent | 48e1dc10a9440872c0fc07a7fbcfce177f996fd4 (diff) | |
| download | linux-daea3daaf9d5606735a722677125fe860f86ff41.tar.bz2 | |
Merge tag 'mmc-v4.14-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"A couple of MMC host fixes intended for v4.14-rc8:
- renesas_sdhi: fix kernel panic
- tmio: fix swiotlb buffer is full"
* tag 'mmc-v4.14-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: renesas_sdhi: fix kernel panic in _internal_dmac.c
mmc: tmio: fix swiotlb buffer is full
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/renesas_sdhi_internal_dmac.c | 17 | ||||
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_core.c | 13 |
2 files changed, 23 insertions, 7 deletions
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index f905f2361d12..8bae88a150fd 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -146,11 +146,8 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host, WARN_ON(host->sg_len > 1); /* This DMAC cannot handle if buffer is not 8-bytes alignment */ - if (!IS_ALIGNED(sg->offset, 8)) { - host->force_pio = true; - renesas_sdhi_internal_dmac_enable_dma(host, false); - return; - } + if (!IS_ALIGNED(sg->offset, 8)) + goto force_pio; if (data->flags & MMC_DATA_READ) { dtran_mode |= DTRAN_MODE_CH_NUM_CH1; @@ -163,8 +160,8 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host, } ret = dma_map_sg(&host->pdev->dev, sg, host->sg_len, dir); - if (ret < 0) - return; + if (ret == 0) + goto force_pio; renesas_sdhi_internal_dmac_enable_dma(host, true); @@ -176,6 +173,12 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host, dtran_mode); renesas_sdhi_internal_dmac_dm_write(host, DM_DTRAN_ADDR, sg->dma_address); + + return; + +force_pio: + host->force_pio = true; + renesas_sdhi_internal_dmac_enable_dma(host, false); } static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index a7293e186e03..9c4e6199b854 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -47,6 +47,7 @@ #include <linux/mmc/sdio.h> #include <linux/scatterlist.h> #include <linux/spinlock.h> +#include <linux/swiotlb.h> #include <linux/workqueue.h> #include "tmio_mmc.h" @@ -1215,6 +1216,18 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host, mmc->max_blk_count = pdata->max_blk_count ? : (PAGE_SIZE / mmc->max_blk_size) * mmc->max_segs; mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; + /* + * Since swiotlb has memory size limitation, this will calculate + * the maximum size locally (because we don't have any APIs for it now) + * and check the current max_req_size. And then, this will update + * the max_req_size if needed as a workaround. + */ + if (swiotlb_max_segment()) { + unsigned int max_size = (1 << IO_TLB_SHIFT) * IO_TLB_SEGSIZE; + + if (mmc->max_req_size > max_size) + mmc->max_req_size = max_size; + } mmc->max_seg_size = mmc->max_req_size; _host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD || |