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UPSTREAM: usb: gadget: f_uac2: Fix incorrect increment of bNumEndpoints

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Currently connect/disconnect of USB cable calls afunc_bind and
eventually increments the bNumEndpoints. Performing multiple
plugin/plugout will increment bNumEndpoints incorrectly, and on
the next plug-in it leads to invalid configuration of descriptor
and hence enumeration fails.

Fix this by resetting the value of bNumEndpoints to 1 on every
afunc_bind call.

Bug: 254441685
Fixes: 40c73b30546e ("usb: gadget: f_uac2: add adaptive sync support for capture")
Cc: stable <stable@kernel.org>
Signed-off-by: Pratham Pratap <quic_ppratap@quicinc.com>
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
Link: https://lore.kernel.org/r/1674631645-28888-1-git-send-email-quic_prashk@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 2fa89458af9993fab8054daf827f38881e2ad473)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: Ibbc0b098b7fc4d2d8e07dc4aa9be2917dc57bd64
This commit is contained in:
Pratham Pratap 2023-01-25 12:57:25 +05:30 committed by Lee Jones
parent 43390f1621
commit 1b307b685c
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/gadget/function/f_uac2.c
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@ -1097,6 +1097,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
}
std_as_out_if0_desc.bInterfaceNumber = ret;
std_as_out_if1_desc.bInterfaceNumber = ret;
std_as_out_if1_desc.bNumEndpoints = 1;
uac2->as_out_intf = ret;
uac2->as_out_alt = 0;