From: Daniel Verkamp <daniel@drv.nu>
Date: Fri, 24 Feb 2017 06:27:56 +0000 (-0700)
Subject: nvme: fix extraction of status code bits
X-Git-Tag: rel-1.11.0~53
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=d8a6c846924df07af2e48796af8b0a0f03e94f9a;p=seabios.git

nvme: fix extraction of status code bits

The status code field is 8 bits wide starting at bit 1; the previous
code would truncate the top bit.

Signed-off-by: Daniel Verkamp <daniel@drv.nu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---

diff --git a/src/hw/nvme.c b/src/hw/nvme.c
index 97b05cb..9fda011 100644
--- a/src/hw/nvme.c
+++ b/src/hw/nvme.c
@@ -74,7 +74,7 @@ nvme_poll_cq(struct nvme_cq *cq)
 static int
 nvme_is_cqe_success(struct nvme_cqe const *cqe)
 {
-    return (cqe->status & 0xFF) >> 1 == 0;
+    return ((cqe->status >> 1) & 0xFF) == 0;
 }