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usb: gadget: Fix issue in config_desc with OS descriptor handling

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If a gadget provides "OS descriptors" from the userspace then composite
gadget driver designates only one configuration which has OS descriptor
support to be used always with the hosts. With this we are seeing
enumeration issues in multi-config compositions where device does not
allowing Host to identify preferred configuration to choose.

Hence change the logic in config_desc for handling OS descriptor
configuration.

Change-Id: I5daa7631f9f2d634ee6b4b377b8d66283b21a497
Signed-off-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>
This commit is contained in:
Chandana Kishori Chiluveru 2018-09-04 17:22:33 +05:30 • committed by Gerrit - the friendly Code Review server
commit cbf6ccd429
1 changed files with 0 additions and 8 deletions
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8
drivers/usb/gadget/composite.c
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@ -612,18 +612,10 @@ static int config_desc(struct usb_composite_dev *cdev, unsigned w_value)
w_value &= 0xff;
pos = &cdev->configs;
c = cdev->os_desc_config;
if (c)
goto check_config;
while ((pos = pos->next) != &cdev->configs) {
c = list_entry(pos, typeof(*c), list);
/* skip OS Descriptors config which is handled separately */
if (c == cdev->os_desc_config)
continue;
check_config:
/* ignore configs that won't work at this speed */
switch (speed) {
case USB_SPEED_SUPER_PLUS: