openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[media] media: rc: nuvoton: remove usage of b_idx in nvt_get_rx_ir_data 

The call to nvt_get_rx_ir_data and nvt_process_rx_ir_data from
the ISR is protected with spinlock nvt->lock. Therefore it's
guaranteed that nvt->pkts is 0 when entering nvt_get_rx_ir_data
(as nvt->pkts is set to 0 at the end of nvt_process_rx_ir_data).
Having said that we can remove b_idx.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Heiner Kallweit 2016-08-02 02:44:44 -03:00 committed by Mauro Carvalho Chehab
parent d14f291b62
commit bacf8351f2
1 changed files with 2 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/media/rc/nuvoton-cir.c
View File

@ -802,7 +802,6 @@ static void nvt_handle_rx_fifo_overrun(struct nvt_dev *nvt)
static void nvt_get_rx_ir_data(struct nvt_dev *nvt)
{
u8 fifocount, val;
unsigned int b_idx;
int i;
/* Get count of how many bytes to read from RX FIFO */
@ -810,21 +809,13 @@ static void nvt_get_rx_ir_data(struct nvt_dev *nvt)
nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount);
b_idx = nvt->pkts;
/* This should never happen, but lets check anyway... */
if (b_idx + fifocount > RX_BUF_LEN) {
nvt_process_rx_ir_data(nvt);
b_idx = 0;
}
/* Read fifocount bytes from CIR Sample RX FIFO register */
for (i = 0; i < fifocount; i++) {
val = nvt_cir_reg_read(nvt, CIR_SRXFIFO);
nvt->buf[b_idx + i] = val;
nvt->buf[i] = val;
}
nvt->pkts += fifocount;
nvt->pkts = fifocount;
nvt_dbg("%s: pkts now %d", __func__, nvt->pkts);
nvt_process_rx_ir_data(nvt);