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Diffstat (limited to 'arch/powerpc/platforms/pseries/hvconsole.c')
-rw-r--r--arch/powerpc/platforms/pseries/hvconsole.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/hvconsole.c b/arch/powerpc/platforms/pseries/hvconsole.c
index 138e128a388..ba6befd9663 100644
--- a/arch/powerpc/platforms/pseries/hvconsole.c
+++ b/arch/powerpc/platforms/pseries/hvconsole.c
@@ -62,6 +62,11 @@ int hvc_put_chars(uint32_t vtermno, const char *buf, int count)
unsigned long *lbuf = (unsigned long *) buf;
long ret;
+
+ /* hcall will ret H_PARAMETER if 'count' exceeds firmware max.*/
+ if (count > MAX_VIO_PUT_CHARS)
+ count = MAX_VIO_PUT_CHARS;
+
ret = plpar_hcall_norets(H_PUT_TERM_CHAR, vtermno, count, lbuf[0],
lbuf[1]);
if (ret == H_Success)