[U-Boot] [PATCH 1/3] musb: sunxi: Do not allocate musb struct multiple times

[Hans de Goede]

The probe function of the musb host driver can be called multiple
times. The code assumes that it can safe the pointer to the allocated
musb struct in the driver model priv_auto_alloc data, but this data
gets free-ed on a probe failure or on removal, so we must safe the
pointer elsewhere.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 drivers/usb/musb-new/sunxi.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/musb-new/sunxi.c b/drivers/usb/musb-new/sunxi.c
index be1d2ec..3081afc 100644
--- a/drivers/usb/musb-new/sunxi.c
+++ b/drivers/usb/musb-new/sunxi.c
@@ -201,6 +201,7 @@ static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci)
 
 /* musb_core does not call enable / disable in a balanced manner <sigh> */
 static bool enabled = false;
+static struct musb *sunxi_musb;
 
 static int sunxi_musb_enable(struct musb *musb)
 {
@@ -320,13 +321,15 @@ int musb_usb_probe(struct udevice *dev)
 
 	priv->desc_before_addr = true;
 
-	if (!host->host) {
-		host->host = musb_init_controller(&musb_plat, NULL,
+	if (!sunxi_musb) {
+		sunxi_musb = musb_init_controller(&musb_plat, NULL,
 						  (void *)SUNXI_USB0_BASE);
-		if (!host->host)
-			return -EIO;
 	}
 
+	host->host = sunxi_musb;
+	if (!host->host)
+		return -EIO;
+
 	ret = musb_lowlevel_init(host);
 	if (ret == 0)
 		printf("MUSB OTG\n");
-- 
2.7.2