mmc: mmci: simplify err check in mmci_post_request

The error condition indicates that mmci_post_request() should cleanup
after the mmci_pre_request(). In this case the resources allocated by
device_prep_slave_sg() are freed by calling dmaengine_terminate_all().
dma_unmap_sg() should always be performed if the host_cookie is set.
Signed-off-by: NPer Forlin <per.forlin@linaro.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NChris Ball <cjb@laptop.org>

drivers/mmc/host/mmci.c

@@ -529,7 +529,7 @@ static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq,
 	if (chan) {
 		if (err)
 			dmaengine_terminate_all(chan);
-		if (err || data->host_cookie)
+		if (data->host_cookie)
 			dma_unmap_sg(mmc_dev(host->mmc), data->sg,
 				     data->sg_len, dir);
 		mrq->data->host_cookie = 0;