A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-08 12:58:12 -04:00
Code Issues Projects Releases Packages Wiki Activity

serial: msm_geni_serial: Bailout from suspend if RX data is pending

Browse source 
This change is to resolve potential race btw stop rx and cancel rx
due to interrupt latency in the system.

Change-Id: I7b510949f75bac5ec9f8f42f3d139131b259600f
Signed-off-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>
This commit is contained in:
Chandana Kishori Chiluveru 2021-04-06 12:59:43 +05:30
commit f46551cd83
1 changed files with 9 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
drivers/tty/serial/msm_geni_serial.c
View file

@ -1417,6 +1417,7 @@ static int stop_rx_sequencer(struct uart_port *uport)
bool is_rx_active;
unsigned int stale_delay;
u32 dma_rx_status, s_irq_status;
int usage_count;
IPC_LOG_MSG(port->ipc_log_misc, "%s\n", __func__);
@ -1458,6 +1459,14 @@ static int stop_rx_sequencer(struct uart_port *uport)
IPC_LOG_MSG(port->ipc_log_misc, "%s: Interrupt delay\n",
__func__);
handle_rx_dma_xfer(s_irq_status, uport);
if (!port->ioctl_count) {
usage_count = atomic_read(&uport->dev->power.usage_count);
IPC_LOG_MSG(port->ipc_log_misc,
"%s: Abort Stop Rx, extend the PM timer, usage_count:%d\n",
__func__, usage_count);
pm_runtime_mark_last_busy(uport->dev);
return -EBUSY;
}
}
}