From a3f406f861456987c9fce8cfa0a00d07b16cdec0 Mon Sep 17 00:00:00 2001 From: Jarkko Lavinen Date: Tue, 22 Sep 2009 16:44:46 -0700 Subject: [PATCH] omap_hsmmc: fix scatter-gather list sanity checking Do not use host->dma_len when it is uninitialzed. Finish the request with an error if the mmc_omap_prepare_data() fails. Signed-off-by: Jarkko Lavinen Signed-off-by: Adrian Hunter Acked-by: Matt Fleming Cc: Ian Molton Cc: "Roberto A. Foglietta" Cc: Jarkko Lavinen Cc: Denis Karpov Cc: Pierre Ossman Cc: Philip Langdale Cc: "Madhusudhan" Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/mmc/host/omap_hsmmc.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 9599dd126ac8..f588deff8b2c 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -878,7 +878,7 @@ mmc_omap_start_dma_transfer(struct mmc_omap_host *host, struct mmc_request *req) struct mmc_data *data = req->data; /* Sanity check: all the SG entries must be aligned by block size. */ - for (i = 0; i < host->dma_len; i++) { + for (i = 0; i < data->sg_len; i++) { struct scatterlist *sgl; sgl = data->sg + i; @@ -1021,10 +1021,20 @@ static int omap_mmc_disable(struct mmc_host *mmc, int lazy) static void omap_mmc_request(struct mmc_host *mmc, struct mmc_request *req) { struct mmc_omap_host *host = mmc_priv(mmc); + int err; WARN_ON(host->mrq != NULL); host->mrq = req; - mmc_omap_prepare_data(host, req); + err = mmc_omap_prepare_data(host, req); + if (err) { + req->cmd->error = err; + if (req->data) + req->data->error = err; + host->mrq = NULL; + mmc_request_done(mmc, req); + return; + } + mmc_omap_start_command(host, req->cmd, req->data); } -- 2.30.2