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| author | Alan Stern <stern@rowland.harvard.edu> | 2020-11-19 12:00:40 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-02 08:31:29 +0100 |
| commit | bab3f154b0e0565c49fbfcf988c68d239c8edcd7 (patch) | |
| tree | 2e22bcf9992258bbee22c95c70f99d260440967e /fs/nls/nls_koi8-r.c | |
| parent | c795e16801aa97668f41a1354632903da5ba3c72 (diff) | |
| download | linux-stable-bab3f154b0e0565c49fbfcf988c68d239c8edcd7.tar.gz linux-stable-bab3f154b0e0565c49fbfcf988c68d239c8edcd7.tar.bz2 linux-stable-bab3f154b0e0565c49fbfcf988c68d239c8edcd7.zip | |
USB: core: Fix regression in Hercules audio card
commit 184eead057cc7e803558269babc1f2cfb9113ad1 upstream
Commit 3e4f8e21c4f2 ("USB: core: fix check for duplicate endpoints")
aimed to make the USB stack more reliable by detecting and skipping
over endpoints that are duplicated between interfaces. This caused a
regression for a Hercules audio card (reported as Bugzilla #208357),
which contains such non-compliant duplications. Although the
duplications are harmless, skipping the valid endpoints prevented the
device from working.
This patch fixes the regression by adding ENDPOINT_IGNORE quirks for
the Hercules card, telling the kernel to ignore the invalid duplicate
endpoints and thereby allowing the valid endpoints to be used as
intended.
Fixes: 3e4f8e21c4f2 ("USB: core: fix check for duplicate endpoints")
CC: <stable@vger.kernel.org>
Reported-by: Alexander Chalikiopoulos <bugzilla.kernel.org@mrtoasted.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20201119170040.GA576844@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[sudip: use usb_endpoint_blacklist and USB_QUIRK_ENDPOINT_BLACKLIST]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/nls/nls_koi8-r.c')
0 files changed, 0 insertions, 0 deletions