forked from luck/tmp_suning_uos_patched
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>
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@ -291,8 +291,10 @@ static void mxcmci_swap_buffers(struct mmc_data *data)
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struct scatterlist *sg;
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int i;
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for_each_sg(data->sg, sg, data->sg_len, i)
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buffer_swap32(sg_virt(sg), sg->length);
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for_each_sg(data->sg, sg, data->sg_len, i) {
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void *buf = kmap_atomic(sg_page(sg) + sg->offset;
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buffer_swap32(buf, sg->length);
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kunmap_atomic(buf);
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}
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#else
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static inline void mxcmci_swap_buffers(struct mmc_data *data) {}
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@ -609,6 +611,7 @@ static int mxcmci_transfer_data(struct mxcmci_host *host)
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{
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struct mmc_data *data = host->req->data;
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struct scatterlist *sg;
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void *buf;
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int stat, i;
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host->data = data;
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@ -616,14 +619,18 @@ static int mxcmci_transfer_data(struct mxcmci_host *host)
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if (data->flags & MMC_DATA_READ) {
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for_each_sg(data->sg, sg, data->sg_len, i) {
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stat = mxcmci_pull(host, sg_virt(sg), sg->length);
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buf = kmap_atomic(sg_page(sg) + sg->offset);
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stat = mxcmci_pull(host, buf, sg->length);
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kunmap(buf);
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if (stat)
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return stat;
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host->datasize += sg->length;
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}
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} else {
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for_each_sg(data->sg, sg, data->sg_len, i) {
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stat = mxcmci_push(host, sg_virt(sg), sg->length);
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buf = kmap_atomic(sg_page(sg) + sg->offset);
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stat = mxcmci_push(host, buf, sg->length);
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kunmap(buf);
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if (stat)
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return stat;
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host->datasize += sg->length;
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