[PATCH V2 16/32] omap_hsmmc: fix scatter-gather list sanity checking

Adrian Hunter
2009-07-28T10:40:28Z

>From e37dab1cd1f8ac4bf4e2050a744a842d3d7ffdc1 Mon Sep 17 00:00:00 2001
From: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Date: Fri, 24 Apr 2009 14:20:43 +0300
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 <jarkko.lavinen@nokia.com>
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
---
drivers/mmc/host/omap_hsmmc.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index a9f7b74..6222940 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -871,7 +871,7 @@ 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;
@@ -1014,10 +1014,20 @@ 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);
}

--
1.5.6.3