diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/hvconsole.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/hvconsole.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/pseries/hvconsole.c b/arch/powerpc/platforms/pseries/hvconsole.c index 138e128a3886..a72a987f1d4d 100644 --- a/arch/powerpc/platforms/pseries/hvconsole.c +++ b/arch/powerpc/platforms/pseries/hvconsole.c @@ -41,7 +41,7 @@ int hvc_get_chars(uint32_t vtermno, char *buf, int count) unsigned long got; if (plpar_hcall(H_GET_TERM_CHAR, vtermno, 0, 0, 0, &got, - (unsigned long *)buf, (unsigned long *)buf+1) == H_Success) + (unsigned long *)buf, (unsigned long *)buf+1) == H_SUCCESS) return got; return 0; } @@ -62,11 +62,16 @@ 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) + if (ret == H_SUCCESS) return count; - if (ret == H_Busy) + if (ret == H_BUSY) return 0; return -EIO; } |