qtest/ahci: use generate_pattern everywhere

Fix the pattern generation to actually be interesting,
and make sure all buffers in the ahci-test actually use it.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1441926555-19471-2-git-send-email-jsnow@redhat.com

1 files changed, 6 insertions, 17 deletions

diff --git a/tests/ahci-test.c b/tests/ahci-test.c
index 87d7691861..b1a785c832 100644
--- a/tests/ahci-test.c
+++ b/tests/ahci-test.c
@@ -80,9 +80,9 @@ static void generate_pattern(void *buffer, size_t len, size_t cycle_len)
 
     /* Write an indicative pattern that varies and is unique per-cycle */
     p = rand() % 256;
-    for (i = j = 0; i < len; i++, j++) {
-        tx[i] = p;
-        if (j % cycle_len == 0) {
+    for (i = 0; i < len; i++) {
+        tx[i] = p++ % 256;
+        if (i % cycle_len == 0) {
             p = rand() % 256;
         }
     }
@@ -1155,7 +1155,6 @@ static void ahci_migrate_simple(uint8_t cmd_read, uint8_t cmd_write)
     size_t bufsize = 4096;
     unsigned char *tx = g_malloc(bufsize);
     unsigned char *rx = g_malloc0(bufsize);
-    unsigned i;
     const char *uri = "tcp:127.0.0.1:1234";
 
     src = ahci_boot_and_enable("-m 1024 -M q35 "
@@ -1171,9 +1170,7 @@ static void ahci_migrate_simple(uint8_t cmd_read, uint8_t cmd_write)
     ahci_port_clear(src, px);
 
     /* create pattern */
-    for (i = 0; i < bufsize; i++) {
-        tx[i] = (bufsize - i);
-    }
+    generate_pattern(tx, bufsize, AHCI_SECTOR_SIZE);
 
     /* Write, migrate, then read. */
     ahci_io(src, px, cmd_write, tx, bufsize, 0);
@@ -1213,7 +1210,6 @@ static void ahci_halted_io_test(uint8_t cmd_read, uint8_t cmd_write)
     size_t bufsize = 4096;
     unsigned char *tx = g_malloc(bufsize);
     unsigned char *rx = g_malloc0(bufsize);
-    unsigned i;
     uint64_t ptr;
     AHCICommand *cmd;
 
@@ -1231,11 +1227,8 @@ static void ahci_halted_io_test(uint8_t cmd_read, uint8_t cmd_write)
     port = ahci_port_select(ahci);
     ahci_port_clear(ahci, port);
 
-    for (i = 0; i < bufsize; i++) {
-        tx[i] = (bufsize - i);
-    }
-
     /* create DMA source buffer and write pattern */
+    generate_pattern(tx, bufsize, AHCI_SECTOR_SIZE);
     ptr = ahci_alloc(ahci, bufsize);
     g_assert(ptr);
     memwrite(ptr, tx, bufsize);
@@ -1282,7 +1275,6 @@ static void ahci_migrate_halted_io(uint8_t cmd_read, uint8_t cmd_write)
     size_t bufsize = 4096;
     unsigned char *tx = g_malloc(bufsize);
     unsigned char *rx = g_malloc0(bufsize);
-    unsigned i;
     uint64_t ptr;
     AHCICommand *cmd;
     const char *uri = "tcp:127.0.0.1:1234";
@@ -1310,10 +1302,7 @@ static void ahci_migrate_halted_io(uint8_t cmd_read, uint8_t cmd_write)
     /* Initialize and prepare */
     port = ahci_port_select(src);
     ahci_port_clear(src, port);
-
-    for (i = 0; i < bufsize; i++) {
-        tx[i] = (bufsize - i);
-    }
+    generate_pattern(tx, bufsize, AHCI_SECTOR_SIZE);
 
     /* create DMA source buffer and write pattern */
     ptr = ahci_alloc(src, bufsize);