Re: [PATCH] Input: gscps2 - advance receive buffer write index

[Dmitry Torokhov]

On Wed, Jun 24, 2026 at 05:47:39PM +0800, raoxu wrote:
> From: Xu Rao <raoxu@xxxxxxxxxxxxx>
> 
> Commit 44f920069911 ("Input: gscps2 - use guard notation when
> acquiring spinlock") moved the receive loop into gscps2_read_data()
> and gscps2_report_data().
> 
> While moving the code, it preserved the writes to
> buffer[ps2port->append], but omitted the following producer index
> update from the original loop:
> 
> 	ps2port->append = (ps2port->append + 1) & BUFFER_SIZE;
> 
> As a result, append never advances. Since gscps2_report_data() only
> reports bytes while act != append, the receive buffer always appears
> empty and no keyboard or mouse data reaches the serio core.
> 
> Restore the omitted index update.
> 
> Fixes: 44f920069911 ("Input: gscps2 - use guard notation when acquiring spinlock")
> Cc: stable@xxxxxxxxxxxxxxx # 6.13+
> Signed-off-by: Xu Rao <raoxu@xxxxxxxxxxxxx>

Applied, thank you.

-- 
Dmitry