From: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: Fri, 19 Aug 2022 15:39:25 +0000 (+0100)
Subject: hw/net/e1000e_core: Use definition to avoid dynamic stack allocation
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c140a69055bad798a335ea3c83aebceaca82bde0;p=qemu.git

hw/net/e1000e_core: Use definition to avoid dynamic stack allocation

The compiler isn't clever enough to figure 'min_buf_size'
is a constant, so help it by using a definitions instead.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220819153931.3147384-6-peter.maydell@linaro.org
---

diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c
index 208e3e0d79..82aa61fedc 100644
--- a/hw/net/e1000e_core.c
+++ b/hw/net/e1000e_core.c
@@ -1622,15 +1622,16 @@ e1000e_rx_fix_l4_csum(E1000ECore *core, struct NetRxPkt *pkt)
     }
 }
 
+/* Min. octets in an ethernet frame sans FCS */
+#define MIN_BUF_SIZE 60
+
 ssize_t
 e1000e_receive_iov(E1000ECore *core, const struct iovec *iov, int iovcnt)
 {
     static const int maximum_ethernet_hdr_len = (14 + 4);
-    /* Min. octets in an ethernet frame sans FCS */
-    static const int min_buf_size = 60;
 
     uint32_t n = 0;
-    uint8_t min_buf[min_buf_size];
+    uint8_t min_buf[MIN_BUF_SIZE];
     struct iovec min_iov;
     uint8_t *filter_buf;
     size_t size, orig_size;