diff options
author | Ian Wisbon <ian.wisbon@timesys.com> | 2011-02-14 16:41:03 -0500 |
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committer | Ian Wisbon <ian.wisbon@timesys.com> | 2011-02-14 16:41:03 -0500 |
commit | 8a83780a187ba1961380814eaf9c503043345d12 (patch) | |
tree | 80f5d89cca49330e137688c72fb10c9f42dc5663 /drivers/char/hvc_xen.c | |
parent | 14a4057959f8ee0a2249eb2abd64fd6b1f571d98 (diff) |
Digi Release Code from del-5.6/main2.6.31-digi-201102141643
Diffstat (limited to 'drivers/char/hvc_xen.c')
-rw-r--r-- | drivers/char/hvc_xen.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c index eba999f8598d..ae453cc25a66 100644 --- a/drivers/char/hvc_xen.c +++ b/drivers/char/hvc_xen.c @@ -55,7 +55,7 @@ static inline void notify_daemon(void) notify_remote_via_evtchn(xen_start_info->console.domU.evtchn); } -static int write_console(uint32_t vtermno, const char *data, int len) +static int __write_console(const char *data, int len) { struct xencons_interface *intf = xencons_interface(); XENCONS_RING_IDX cons, prod; @@ -76,6 +76,29 @@ static int write_console(uint32_t vtermno, const char *data, int len) return sent; } +static int write_console(uint32_t vtermno, const char *data, int len) +{ + int ret = len; + + /* + * Make sure the whole buffer is emitted, polling if + * necessary. We don't ever want to rely on the hvc daemon + * because the most interesting console output is when the + * kernel is crippled. + */ + while (len) { + int sent = __write_console(data, len); + + data += sent; + len -= sent; + + if (unlikely(len)) + HYPERVISOR_sched_op(SCHEDOP_yield, NULL); + } + + return ret; +} + static int read_console(uint32_t vtermno, char *buf, int len) { struct xencons_interface *intf = xencons_interface(); |