diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-05-18 19:18:44 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-05-21 15:49:20 +0200 |
| commit | b189e7589f6d3411e85c6b7ae6eef158f08f388f (patch) | |
| tree | 8952080c721ea9487ad3d4aa46afb13c982d4b55 /drivers/mmc | |
| parent | 5b4277814e3fd91b60f9b4fb4a702050eed27c87 (diff) | |
| download | linux-b189e7589f6d3411e85c6b7ae6eef158f08f388f.tar.bz2 | |
mmc: mxcmmc: handle highmem pages
Use kmap_atomic to map the scatterlist entry before using it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/mxcmmc.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c index 5ff8ef7223cc..150fbdba777d 100644 --- a/drivers/mmc/host/mxcmmc.c +++ b/drivers/mmc/host/mxcmmc.c @@ -291,8 +291,10 @@ static void mxcmci_swap_buffers(struct mmc_data *data) struct scatterlist *sg; int i; - for_each_sg(data->sg, sg, data->sg_len, i) - buffer_swap32(sg_virt(sg), sg->length); + for_each_sg(data->sg, sg, data->sg_len, i) { + void *buf = kmap_atomic(sg_page(sg) + sg->offset; + buffer_swap32(buf, sg->length); + kunmap_atomic(buf); } #else static inline void mxcmci_swap_buffers(struct mmc_data *data) {} @@ -609,6 +611,7 @@ static int mxcmci_transfer_data(struct mxcmci_host *host) { struct mmc_data *data = host->req->data; struct scatterlist *sg; + void *buf; int stat, i; host->data = data; @@ -616,14 +619,18 @@ static int mxcmci_transfer_data(struct mxcmci_host *host) if (data->flags & MMC_DATA_READ) { for_each_sg(data->sg, sg, data->sg_len, i) { - stat = mxcmci_pull(host, sg_virt(sg), sg->length); + buf = kmap_atomic(sg_page(sg) + sg->offset); + stat = mxcmci_pull(host, buf, sg->length); + kunmap(buf); if (stat) return stat; host->datasize += sg->length; } } else { for_each_sg(data->sg, sg, data->sg_len, i) { - stat = mxcmci_push(host, sg_virt(sg), sg->length); + buf = kmap_atomic(sg_page(sg) + sg->offset); + stat = mxcmci_push(host, buf, sg->length); + kunmap(buf); if (stat) return stat; host->datasize += sg->length; |