[xen stable-4.17] ns16550: correct name/value pair parsing for PCI port/bridge

[patchbot@xxxxxxx]

commit 7758cd57e002c5096b2296ede67c59fca68724d7
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Mar 31 08:35:15 2023 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Mar 31 08:35:15 2023 +0200

    ns16550: correct name/value pair parsing for PCI port/bridge
    
    First of all these were inverted: "bridge=" caused the port coordinates
    to be established, while "port=" controlled the bridge coordinates. And
    then the error messages being identical also wasn't helpful. While
    correcting this also move both case blocks close together.
    
    Fixes: 97fd49a7e074 ("ns16550: add support for UART parameters to be 
specifed with name-value pairs")
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    master commit: e692b22230b411d762ac9e278a398e28df474eae
    master date: 2023-03-29 14:55:37 +0200
---
 xen/drivers/char/ns16550.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/xen/drivers/char/ns16550.c b/xen/drivers/char/ns16550.c
index ce013fb6a5..97b3d8d269 100644
--- a/xen/drivers/char/ns16550.c
+++ b/xen/drivers/char/ns16550.c
@@ -1631,13 +1631,6 @@ static bool __init parse_namevalue_pairs(char *str, 
struct ns16550 *uart)
             break;
 
 #ifdef CONFIG_HAS_PCI
-        case bridge_bdf:
-            if ( !parse_pci(param_value, NULL, &uart->ps_bdf[0],
-                            &uart->ps_bdf[1], &uart->ps_bdf[2]) )
-                PARSE_ERR_RET("Bad port PCI coordinates\n");
-            uart->ps_bdf_enable = true;
-            break;
-
         case device:
             if ( strncmp(param_value, "pci", 3) == 0 )
             {
@@ -1652,9 +1645,16 @@ static bool __init parse_namevalue_pairs(char *str, 
struct ns16550 *uart)
             break;
 
         case port_bdf:
+            if ( !parse_pci(param_value, NULL, &uart->ps_bdf[0],
+                            &uart->ps_bdf[1], &uart->ps_bdf[2]) )
+                PARSE_ERR_RET("Bad port PCI coordinates\n");
+            uart->ps_bdf_enable = true;
+            break;
+
+        case bridge_bdf:
             if ( !parse_pci(param_value, NULL, &uart->pb_bdf[0],
                             &uart->pb_bdf[1], &uart->pb_bdf[2]) )
-                PARSE_ERR_RET("Bad port PCI coordinates\n");
+                PARSE_ERR_RET("Bad bridge PCI coordinates\n");
             uart->pb_bdf_enable = true;
             break;
 #endif
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.17