Change since v6: Add judgement basis "result != -EPIPE" of return error.
Since usb port may power off, usb device descriptor can't be get
at that time and usb_get_configuration() should return error.
Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
---
drivers/usb/core/config.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index f4bdd0c..7199adc 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -702,6 +702,8 @@ int usb_get_configuration(struct usb_device *dev)
if (result < 0) {
dev_err(ddev, "unable to read config index %d "
"descriptor/%s: %d\n", cfgno, "start", result);
+ if (result != -EPIPE)
+ goto err;
dev_err(ddev, "chopping to %d config(s)\n", cfgno);
dev->descriptor.bNumConfigurations = cfgno;
break;
--
1.7.6.rc2.8.g28eb
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