From: Christian Lamparter chunkeey@gmail.com
commit 746c908c4d72e49068ab216c3926d2720d71a90d upstream.
This patch fixes a crash that can happen during probe when the available dma memory is not enough (this can happen if the crypto4xx is built as a module).
The descriptor window mapping would end up being free'd twice, once in crypto4xx_build_pdr() and the second time in crypto4xx_destroy_sdr().
Fixes: 5d59ad6eea82 ("crypto: crypto4xx - fix crypto4xx_build_pdr, crypto4xx_build_sdr leak") Cc: stable@vger.kernel.org Signed-off-by: Christian Lamparter chunkeey@gmail.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/crypto/amcc/crypto4xx_core.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-)
--- a/drivers/crypto/amcc/crypto4xx_core.c +++ b/drivers/crypto/amcc/crypto4xx_core.c @@ -365,12 +365,8 @@ static u32 crypto4xx_build_sdr(struct cr dma_alloc_coherent(dev->core_dev->device, PPC4XX_SD_BUFFER_SIZE * PPC4XX_NUM_SD, &dev->scatter_buffer_pa, GFP_ATOMIC); - if (!dev->scatter_buffer_va) { - dma_free_coherent(dev->core_dev->device, - sizeof(struct ce_sd) * PPC4XX_NUM_SD, - dev->sdr, dev->sdr_pa); + if (!dev->scatter_buffer_va) return -ENOMEM; - }
for (i = 0; i < PPC4XX_NUM_SD; i++) { dev->sdr[i].ptr = dev->scatter_buffer_pa +