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omap_hsmmc: fix scatter-gather list sanity checking

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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>
Acked-by: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Denis Karpov <ext-denis.2.karpov@nokia.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Philip Langdale <philipl@overt.org>
Cc: "Madhusudhan" <madhu.cr@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jarkko Lavinen 2009-09-22 16:44:46 -07:00 committed by Linus Torvalds
parent a6b2240da2
commit a3f406f861
1 changed files with 12 additions and 2 deletions
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14
drivers/mmc/host/omap_hsmmc.c
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@ -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);
}