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s390/sclpconsole: handle char layer busy conditions 

Handle busy conditions (errno=EAGAIN) in char layer by using
the new char layer in the sclp console.

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Heinz Graalfs 2013-05-28 15:03:55 +02:00 committed by Christian Borntraeger
parent dbe49aea76
commit 2e14211476
1 changed files with 1 additions and 17 deletions
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18
hw/char/sclpconsole.c
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@ -184,8 +184,6 @@ static int read_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr,
static ssize_t write_console_data(SCLPEvent *event, const uint8_t *buf, static ssize_t write_console_data(SCLPEvent *event, const uint8_t *buf,
size_t len) size_t len)
{ {
ssize_t ret = 0;
const uint8_t *iov_offset;
SCLPConsole *scon = DO_UPCAST(SCLPConsole, event, event); SCLPConsole *scon = DO_UPCAST(SCLPConsole, event, event);
if (!scon->chr) { if (!scon->chr) {
@ -193,21 +191,7 @@ static ssize_t write_console_data(SCLPEvent *event, const uint8_t *buf,
return len; return len;
} }
iov_offset = buf; return qemu_chr_fe_write_all(scon->chr, buf, len);
while (len > 0) {
ret = qemu_chr_fe_write(scon->chr, buf, len);
if (ret == 0) {
/* a pty doesn't seem to be connected - no error */
len = 0;
} else if (ret == -EAGAIN || (ret > 0 && ret < len)) {
len -= ret;
iov_offset += ret;
} else {
len = 0;
}
}
return ret;
} }
static int write_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr) static int write_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr)