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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 08:29:29 +0100 |
| commit | 0c2e89d4d157b0cc52ec605b54e52bf3d16e2ba1 (patch) | |
| tree | 58af1267030ce7c486b3a3deb28dd9248bb1ae7f /fs/anon_inodes.c | |
| parent | d3fa1c6a3506d44e7f74f25fcb9beb1df66521f5 (diff) | |
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/anon_inodes.c')
0 files changed, 0 insertions, 0 deletions