From: Keith Busch <keith.busch@intel.com>
Date: Tue, 17 May 2016 17:07:34 +0000 (-0600)
Subject: Align passthrough buffers
X-Git-Tag: v0.7~2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=2b35b6581d271661963c1ac7bb6675354908707f;p=users%2Fsagi%2Fnvme-cli.git

Align passthrough buffers

Some versions of the kernel will create bounce buffers instead of using
directly if the user buffer is not aligned.

Signed-off-by: Keith Busch <keith.busch@intel.com>
---

diff --git a/nvme.c b/nvme.c
index 7d9cb8f2..ab469af5 100644
--- a/nvme.c
+++ b/nvme.c
@@ -2421,9 +2421,9 @@ static int passthru(int argc, char **argv, int ioctl_cmd, const char *desc)
 	if (cfg.metadata_len)
 		metadata = malloc(cfg.metadata_len);
 	if (cfg.data_len) {
-		data = malloc(cfg.data_len);
-		if (!data)
+		if (posix_memalign(&data, getpagesize(), cfg.data_len))
 			exit(ENOMEM);
+
 		memset(data, cfg.prefill, cfg.data_len);
 		if (!cfg.read && !cfg.write) {
 			fprintf(stderr, "data direction not given\n");