mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-03-05 17:57:50 +07:00
3d5a2db695
caamhash contains this weird code: src_nents = sg_count(req->src, req->nbytes); dma_map_sg(jrdev, req->src, src_nents ? : 1, DMA_TO_DEVICE); ... edesc->src_nents = src_nents; sg_count() returns zero when sg_nents_for_len() returns zero or one. This means we don't need to use a hardware scatterlist. However, setting src_nents to zero causes problems when we unmap: if (edesc->src_nents) dma_unmap_sg_chained(dev, req->src, edesc->src_nents, DMA_TO_DEVICE, edesc->chained); as zero here means that we have no entries to unmap. This causes us to leak DMA mappings, where we map one scatterlist entry and then fail to unmap it. This can be fixed in two ways: either by writing the number of entries that were requested of dma_map_sg(), or by reworking the "no SG required" case. We adopt the re-work solution here - we replace sg_count() with sg_nents_for_len(), so src_nents now contains the real number of scatterlist entries, and we then change the test for using the hardware scatterlist to src_nents > 1 rather than just non-zero. This change passes my sshd, openssl tests hashing /bin and tcrypt tests. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
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| .. | ||
| amcc | ||
| caam | ||
| ccp | ||
| marvell | ||
| nx | ||
| qat | ||
| qce | ||
| rockchip | ||
| sunxi-ss | ||
| ux500 | ||
| vmx | ||
| atmel-aes-regs.h | ||
| atmel-aes.c | ||
| atmel-sha-regs.h | ||
| atmel-sha.c | ||
| atmel-tdes-regs.h | ||
| atmel-tdes.c | ||
| bfin_crc.c | ||
| bfin_crc.h | ||
| geode-aes.c | ||
| geode-aes.h | ||
| hifn_795x.c | ||
| img-hash.c | ||
| ixp4xx_crypto.c | ||
| Kconfig | ||
| Makefile | ||
| mv_cesa.c | ||
| mv_cesa.h | ||
| mxc-scc.c | ||
| mxs-dcp.c | ||
| n2_asm.S | ||
| n2_core.c | ||
| n2_core.h | ||
| omap-aes.c | ||
| omap-des.c | ||
| omap-sham.c | ||
| padlock-aes.c | ||
| padlock-sha.c | ||
| picoxcell_crypto_regs.h | ||
| picoxcell_crypto.c | ||
| s5p-sss.c | ||
| sahara.c | ||
| talitos.c | ||
| talitos.h | ||