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authorTony Lindgren <tony@atomide.com>2016-05-31 18:05:19 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-06-02 00:58:59 +0300
commit12b7db2bf8b88938798c60416172b53225207b1f (patch)
tree43e7c3b09fec20d63799e5a2740e0e1b26c25f46 /drivers/usb/musb/omap2430.c
parenta118df07f5b19e4879fd67e98a69f4644136877f (diff)
downloadlinux-12b7db2bf8b88938798c60416172b53225207b1f.tar.xz
usb: musb: Return error value from musb_mailbox
At least on n900 we have phy-twl4030-usb only generating cable interrupts, and then have a separate USB PHY. In order for musb to know the real cable status, we need to clear any cached state until musb is ready. Otherwise the cable status interrupts will get just ignored if the status does not change from the initial state. To do this, let's add a return value to musb_mailbox(), and reset cached linkstat to MUSB_UNKNOWN on error. Sorry to cause a bit of churn here, I should have added that already last time patching musb_mailbox(). Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Bin Liu <b-liu@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb/omap2430.c')
-rw-r--r--drivers/usb/musb/omap2430.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index d312d42592d6..2c54f52ae386 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -180,22 +180,24 @@ static void omap2430_set_power(struct musb *musb, bool enabled, bool cable)
}
}
-static void omap2430_musb_mailbox(enum musb_vbus_id_status status)
+static int omap2430_musb_mailbox(enum musb_vbus_id_status status)
{
struct omap2430_glue *glue = _glue;
if (!glue) {
pr_err("%s: musb core is not yet initialized\n", __func__);
- return;
+ return -EPROBE_DEFER;
}
glue->status = status;
if (!glue_to_musb(glue)) {
pr_err("%s: musb core is not yet ready\n", __func__);
- return;
+ return -EPROBE_DEFER;
}
schedule_work(&glue->omap_musb_mailbox_work);
+
+ return 0;
}
static void omap_musb_set_mailbox(struct omap2430_glue *glue)