USB: MAX3421: Handle USB NAK correctly
authorMark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Fri, 27 Jan 2023 02:47:34 +0000 (15:47 +1300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 31 Jan 2023 09:38:05 +0000 (10:38 +0100)
commitff826648e1059606f8418f12b69a4b15a1eed1ba
treebad41f7d6e298b87835b32e4b2654a36809392e7
parent7194e5e0907b802ca76c9297399ab540fbf0513d
USB: MAX3421: Handle USB NAK correctly

A USB peripheral can respond with a NAK if it is not yet ready to
send/receive data. In this case, the transaction should be retried. The
MAX3421 driver did do this, and switched to a different type of retry
after a number of 'fast' retries. On at least some USB flash devices,
this second type of retry never succeeds. This patch changes the
behaviour so that 'fast' retries continue.

Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20230127024734.8777-1-mark.tomlinson@alliedtelesis.co.nz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/max3421-hcd.c