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| author |   Ian Campbell <ian.campbell@citrix.com> | 2012-01-04 11:39:52 +0000 |
|---|---|---|
| committer |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-01-04 17:02:05 -0500 |
| commit | a800651e8893007d3a12bc281f0265f18043c4fa (patch) | |
| tree | b2b0a01e26c9dbbe99f3fa4028f8da5bca00020e /drivers/xen/xenbus/xenbus_xs.c | |
| parent | xenbus: maximum buffer size is XENSTORE_PAYLOAD_MAX (diff) | |
| download | linux-dev-a800651e8893007d3a12bc281f0265f18043c4fa.tar.xz linux-dev-a800651e8893007d3a12bc281f0265f18043c4fa.zip | |
xen/xenbus: don't reimplement kvasprintf via a fixed size buffer
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Haogang Chen <haogangchen@gmail.com>
Acked-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/xenbus/xenbus_xs.c')
| -rw-r--r-- | drivers/xen/xenbus/xenbus_xs.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c index 6f0121e3be69..226d1ac55cf4 100644 --- a/drivers/xen/xenbus/xenbus_xs.c +++ b/drivers/xen/xenbus/xenbus_xs.c @@ -532,21 +532,18 @@ int xenbus_printf(struct xenbus_transaction t, { va_list ap; int ret; -#define PRINTF_BUFFER_SIZE 4096 - char *printf_buffer; - - printf_buffer = kmalloc(PRINTF_BUFFER_SIZE, GFP_NOIO | __GFP_HIGH); - if (printf_buffer == NULL) - return -ENOMEM; + char *buf; va_start(ap, fmt); - ret = vsnprintf(printf_buffer, PRINTF_BUFFER_SIZE, fmt, ap); + buf = kvasprintf(GFP_NOIO | __GFP_HIGH, fmt, ap); va_end(ap); - BUG_ON(ret > PRINTF_BUFFER_SIZE-1); - ret = xenbus_write(t, dir, node, printf_buffer); + if (!buf) + return -ENOMEM; + + ret = xenbus_write(t, dir, node, buf); - kfree(printf_buffer); + kfree(buf); return ret; } |