UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

serial: core: enforce type for upf_t when copying 

upf_t is a bitwise defined type and any assignment from different, but
compatible, types makes static analyzer unhappy.

drivers/tty/serial/serial_core.c:793:29: warning: incorrect type in assignment (different base types)
drivers/tty/serial/serial_core.c:793:29:    expected int [signed] flags
drivers/tty/serial/serial_core.c:793:29:    got restricted upf_t [usertype] flags
drivers/tty/serial/serial_core.c:867:19: warning: incorrect type in assignment (different base types)
drivers/tty/serial/serial_core.c:867:19:    expected restricted upf_t [usertype] new_flags
drivers/tty/serial/serial_core.c:867:19:    got int [signed] flags

Enforce corresponding types when upf_t being assigned.

Note, we need __force attribute due to the scope of variable. It's being
used in user space with plain old type while kernel uses bitwise one.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2017-07-25 20:39:57 +03:00 committed by Greg Kroah-Hartman
parent bdc4704b2d
commit a17e74c533
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/tty/serial/serial_core.c
View File

@ -744,7 +744,7 @@ static int uart_get_info(struct tty_port *port, struct serial_struct *retinfo)
if (HIGH_BITS_OFFSET)
retinfo->port_high = (long) uport->iobase >> HIGH_BITS_OFFSET;
retinfo->irq = uport->irq;
retinfo->flags = uport->flags;
retinfo->flags = (__force int)uport->flags;
retinfo->xmit_fifo_size = uport->fifosize;
retinfo->baud_base = uport->uartclk / 16;
retinfo->close_delay = jiffies_to_msecs(port->close_delay) / 10;
@ -818,7 +818,7 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port,
new_info->type != uport->type);
old_flags = uport->flags;
new_flags = new_info->flags;
new_flags = (__force upf_t)new_info->flags;
old_custom_divisor = uport->custom_divisor;
if (!capable(CAP_SYS_ADMIN)) {