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SubjectRe: [PATCH][next] tty: serial: jsm: remove redundant assignments of several variables
On Thu, Apr 22, 2021 at 01:11:15PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Several variables are being assigned with values that are never
> read and being updated later with a new value. The initializations
> are redundant and can be removed.
>
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/tty/serial/jsm/jsm_cls.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/tty/serial/jsm/jsm_cls.c b/drivers/tty/serial/jsm/jsm_cls.c
> index b507a2cec926..b58ea4344aaf 100644
> --- a/drivers/tty/serial/jsm/jsm_cls.c
> +++ b/drivers/tty/serial/jsm/jsm_cls.c
> @@ -349,8 +349,8 @@ static void cls_assert_modem_signals(struct jsm_channel *ch)
>
> static void cls_copy_data_from_uart_to_queue(struct jsm_channel *ch)
> {
> - int qleft = 0;
> - u8 linestatus = 0;
> + int qleft;
> + u8 linestatus;
> u8 error_mask = 0;
> u16 head;
> u16 tail;
> @@ -365,8 +365,6 @@ static void cls_copy_data_from_uart_to_queue(struct jsm_channel *ch)
> head = ch->ch_r_head & RQUEUEMASK;
> tail = ch->ch_r_tail & RQUEUEMASK;
>
> - /* Get our cached LSR */
> - linestatus = ch->ch_cached_lsr;
> ch->ch_cached_lsr = 0;

Why leave this assignment in? Looks like this was all copy-pasta, but
this assignment makes even less sense now that you remove the comment
and load.

Johan

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