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authorChunfeng Yun <chunfeng.yun@mediatek.com>2019-03-21 05:27:56 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-03-26 10:45:03 +0300
commit4d537f37e0d39f64687be71087dca607ee507f5a (patch)
tree9135adefda02e372d0d0286098e05ddf6d301ff0 /drivers/usb/common
parent2a738137b4c2dfddae03cd44f5b5f24f745c2864 (diff)
downloadlinux-4d537f37e0d39f64687be71087dca607ee507f5a.tar.xz
usb: introduce usb_ep_type_string() function
In some places, the code prints a human-readable USB endpoint transfer type (e.g. "bulk"). This involves a switch statement sometimes wrapped around in ({ ... }) block leading to code repetition. To make this scenario easier, here introduces usb_ep_type_string() function, which returns a human-readable name of provided endpoint type. It also changes a few places switch was used to use this new function. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/common')
-rw-r--r--drivers/usb/common/common.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
index 48277bbc15e4..2174dd9ec176 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -16,6 +16,22 @@
#include <linux/usb/otg.h>
#include <linux/of_platform.h>
+static const char *const ep_type_names[] = {
+ [USB_ENDPOINT_XFER_CONTROL] = "ctrl",
+ [USB_ENDPOINT_XFER_ISOC] = "isoc",
+ [USB_ENDPOINT_XFER_BULK] = "bulk",
+ [USB_ENDPOINT_XFER_INT] = "intr",
+};
+
+const char *usb_ep_type_string(int ep_type)
+{
+ if (ep_type < 0 || ep_type >= ARRAY_SIZE(ep_type_names))
+ return "unknown";
+
+ return ep_type_names[ep_type];
+}
+EXPORT_SYMBOL_GPL(usb_ep_type_string);
+
const char *usb_otg_state_string(enum usb_otg_state state)
{
static const char *const names[] = {