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s390x/sclpconsole-lm: Fix and simplify irq setup 

valgrind complains about a memory leak in irq setup of sclpconsole:

==42117== 8 bytes in 1 blocks are definitely lost in loss record 89of 833
==42117==    at 0x4031AFE: malloc (vg_replace_malloc.c:292)
==42117==    by 0x8022F855: malloc_and_trace (vl.c:2715)
==42117==    by 0x4145569: g_malloc (in /usr/lib64/libglib-2.0.so.0.3400.2)
==42117==    by 0x800F696D: qemu_extend_irqs (irq.c:51)
==42117==    by 0x800F6AF7: qemu_allocate_irqs (irq.c:68)
==42117==    by 0x800F5685: console_init (sclpconsole.c:235)
==42117==    by 0x80297C79: event_realize (event-facility.c:386)
==42117==    by 0x80105071: device_set_realized (qdev.c:693)
==42117==    by 0x801CDC4B: property_set_bool (object.c:1337)
 ==42117==    by 0x801CBD7F: object_property_set (object.c:819)
[...]

We dont need the indirection of an qemu irq to inject an slcp interrupt.
Fixes a valgrind error and makes the code simpler.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
This commit is contained in:
Christian Borntraeger 2014-03-10 14:19:52 +01:00
parent b074e62205
commit 4f3ed190a6
1 changed files with 4 additions and 23 deletions
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27
hw/char/sclpconsole-lm.c
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@ -41,7 +41,6 @@ typedef struct SCLPConsoleLM {
uint32_t write_errors; /* errors writing to char layer */
uint32_t length; /* length of byte stream in buffer */
uint8_t buf[SIZE_CONSOLE_BUFFER];
qemu_irq irq_console_read;
} SCLPConsoleLM;
/*
@ -68,13 +67,15 @@ static int chr_can_read(void *opaque)
return 0;
}
static void receive_from_chr_layer(SCLPConsoleLM *scon, const uint8_t *buf,
int size)
static void chr_read(void *opaque, const uint8_t *buf, int size)
{
SCLPConsoleLM *scon = opaque;
assert(size == 1);
if (*buf == '\r' || *buf == '\n') {
scon->event.event_pending = true;
sclp_service_interrupt(0);
return;
}
scon->buf[scon->length] = *buf;
@ -84,20 +85,6 @@ static void receive_from_chr_layer(SCLPConsoleLM *scon, const uint8_t *buf,
}
}
/*
* Send data from a char device over to the guest
*/
static void chr_read(void *opaque, const uint8_t *buf, int size)
{
SCLPConsoleLM *scon = opaque;
receive_from_chr_layer(scon, buf, size);
if (scon->event.event_pending) {
/* trigger SCLP read operation */
qemu_irq_raise(scon->irq_console_read);
}
}
/* functions to be called by event facility */
static bool can_handle_event(uint8_t type)
@ -298,11 +285,6 @@ static int write_event_data(SCLPEvent *event, EventBufferHeader *ebh)
return SCLP_RC_NORMAL_COMPLETION;
}
static void trigger_console_data(void *opaque, int n, int level)
{
sclp_service_interrupt(0);
}
/* functions for live migration */
static const VMStateDescription vmstate_sclplmconsole = {
@ -338,7 +320,6 @@ static int console_init(SCLPEvent *event)
if (scon->chr) {
qemu_chr_add_handlers(scon->chr, chr_can_read, chr_read, NULL, scon);
}
scon->irq_console_read = *qemu_allocate_irqs(trigger_console_data, NULL, 1);
return 0;
}