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| author | Geoffrey D. Bennett <g@b4.vu> | 2025-07-28 19:00:35 +0930 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2025-07-28 11:42:39 +0200 |
| commit | 8a15ca0ca51399b652b1bbb23b590b220cf03d62 (patch) | |
| tree | bedcffabfbc48ad299ed097e9af231ca79229f06 /scripts/lib/kdoc/kdoc_output.py | |
| parent | bd7814a4c0fd883894bdf9fe5eda24c9df826e4c (diff) | |
ALSA: scarlett2: Add retry on -EPROTO from scarlett2_usb_tx()
During communication with Focusrite Scarlett Gen 2/3/4 USB audio
interfaces, -EPROTO is sometimes returned from scarlett2_usb_tx(),
snd_usb_ctl_msg() which can cause initialisation and control
operations to fail intermittently.
This patch adds up to 5 retries in scarlett2_usb(), with a delay
starting at 5ms and doubling each time. This follows the same approach
as the fix for usb_set_interface() in endpoint.c (commit f406005e162b
("ALSA: usb-audio: Add retry on -EPROTO from usb_set_interface()")),
which resolved similar -EPROTO issues during device initialisation,
and is the same approach as in fcp.c:fcp_usb().
Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface")
Closes: https://github.com/geoffreybennett/linux-fcp/issues/41
Cc: stable@vger.kernel.org
Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Link: https://patch.msgid.link/aIdDO6ld50WQwNim@m.b4.vu
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'scripts/lib/kdoc/kdoc_output.py')
0 files changed, 0 insertions, 0 deletions