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| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2019-03-21 05:27:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-26 10:45:03 +0300 |
| commit | 4d537f37e0d39f64687be71087dca607ee507f5a (patch) | |
| tree | 9135adefda02e372d0d0286098e05ddf6d301ff0 /drivers/usb/common | |
| parent | 2a738137b4c2dfddae03cd44f5b5f24f745c2864 (diff) | |
| download | linux-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.c | 16 |
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[] = { |