From: Simon Glass <sjg@chromium.org>
Date: Mon, 24 Apr 2017 02:02:09 +0000 (-0600)
Subject: dm: mmc: Check that drivers have operations
X-Git-Tag: v2017.07-rc1~170
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=66656020ff180e2a689fbe83fcd02c3e42ecdc30;p=u-boot

dm: mmc: Check that drivers have operations

When binding a new MMC device, make sure that it has the required
operations. Since for now we still support *not* having the operations
(with CONFIG_DM_MMC_OPS not enabled) it makes sense to add this check.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
index 8d03ec67c1..c9b6364260 100644
--- a/drivers/mmc/mmc-uclass.c
+++ b/drivers/mmc/mmc-uclass.c
@@ -196,6 +196,10 @@ int mmc_bind(struct udevice *dev, struct mmc *mmc, const struct mmc_config *cfg)
 	struct udevice *bdev;
 	int ret, devnum = -1;
 
+#ifdef CONFIG_DM_MMC_OPS
+	if (!mmc_get_ops(dev))
+		return -ENOSYS;
+#endif
 #ifndef CONFIG_SPL_BUILD
 	/* Use the fixed index with aliase node's index */
 	fdtdec_get_alias_seq(gd->fdt_blob, "mmc", dev_of_offset(dev), &devnum);