[XEN PATCH v4 2/4] xen/ns16550: address violations of MISRA C:2012 Rule 13.1

[Simone Ballarin <simone.ballarin@xxxxxxxxxxx>]

Rule 13.1: Initializer lists shall not contain persistent side effects

The assignment operation in:

.irq = rc = uart->irq,

is a persistent side effect in a struct initializer list.

This patch assigns rc separately outside the structure.

No functional change.

Signed-off-by: Simone Ballarin <simone.ballarin@xxxxxxxxxxx>
Signed-off-by: Maria Celeste Cesario  <maria.celeste.cesario@xxxxxxxxxxx>

---
Changes in v3:
- add assignment of rc;
- use rc as controlling expression in the following if-statement;
- change prefix from xen to xen/ns16550.
Changes in v2:
- avoid assignment of rc;
- drop changes in vcpu_yield(void).
---
 xen/drivers/char/ns16550.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/xen/drivers/char/ns16550.c b/xen/drivers/char/ns16550.c
index afe3d514b9..97bf098534 100644
--- a/xen/drivers/char/ns16550.c
+++ b/xen/drivers/char/ns16550.c
@@ -441,10 +441,12 @@ static void __init cf_check ns16550_init_postirq(struct 
serial_port *port)
             struct msi_info msi = {
                 .sbdf = PCI_SBDF(0, uart->ps_bdf[0], uart->ps_bdf[1],
                                  uart->ps_bdf[2]),
-                .irq = rc = uart->irq,
+                .irq = uart->irq,
                 .entry_nr = 1
             };
 
+            rc = uart->irq;
+
             if ( rc > 0 )
             {
                 struct msi_desc *msi_desc = NULL;
-- 
2.34.1