lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] Serial: Adjust serial locking

Browse Source 
This patch changes the way serial ports are locked when getting modem
status.  This change is necessary because we will need to atomically
read the modem status and take action depending on the CTS status.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2005-06-29 09:42:38 +01:00
committed by Russell King
parent a839688362
commit c5f4644e6c
12 changed files with 29 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/serial/mpsc.c
View File

@ -1058,12 +1058,9 @@ mpsc_get_mctrl(struct uart_port *port)
{
struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
u32 mflags, status;
ulong iflags;
spin_lock_irqsave(&pi->port.lock, iflags);
status = (pi->mirror_regs) ? pi->MPSC_CHR_10_m :
readl(pi->mpsc_base + MPSC_CHR_10);
spin_unlock_irqrestore(&pi->port.lock, iflags);
mflags = 0;
if (status & 0x1)