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[Qemu-devel] [PATCH 05/16] pci-assign: propagate errors from get_real_id
From: |
Laszlo Ersek |
Subject: |
[Qemu-devel] [PATCH 05/16] pci-assign: propagate errors from get_real_id() |
Date: |
Thu, 10 Apr 2014 10:24:34 +0200 |
get_real_id() has two thin wrappers (and no other callers),
get_real_vendor_id() and get_real_device_id(); it's easiest to convert
them in one fell swoop.
Signed-off-by: Laszlo Ersek <address@hidden>
---
hw/i386/kvm/pci-assign.c | 45 +++++++++++++++++++++++++++------------------
1 file changed, 27 insertions(+), 18 deletions(-)
diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
index 6b8db25..997ef09 100644
--- a/hw/i386/kvm/pci-assign.c
+++ b/hw/i386/kvm/pci-assign.c
@@ -497,47 +497,47 @@ static int assigned_dev_register_regions(PCIRegion
*io_regions,
/* success */
return 0;
}
-static int get_real_id(const char *devpath, const char *idname, uint16_t *val)
+static void get_real_id(const char *devpath, const char *idname, uint16_t *val,
+ Error **errp)
{
FILE *f;
char name[128];
long id;
snprintf(name, sizeof(name), "%s%s", devpath, idname);
f = fopen(name, "r");
if (f == NULL) {
- error_report("%s: %s: %m", __func__, name);
- return -1;
+ error_setg_file_open(errp, errno, name);
+ return;
}
if (fscanf(f, "%li\n", &id) == 1) {
*val = id;
} else {
- fclose(f);
- return -1;
+ error_setg(errp, "Failed to parse contents of '%s'", name);
}
fclose(f);
-
- return 0;
}
-static int get_real_vendor_id(const char *devpath, uint16_t *val)
+static void get_real_vendor_id(const char *devpath, uint16_t *val,
+ Error **errp)
{
- return get_real_id(devpath, "vendor", val);
+ get_real_id(devpath, "vendor", val, errp);
}
-static int get_real_device_id(const char *devpath, uint16_t *val)
+static void get_real_device_id(const char *devpath, uint16_t *val,
+ Error **errp)
{
- return get_real_id(devpath, "device", val);
+ get_real_id(devpath, "device", val, errp);
}
static int get_real_device(AssignedDevice *pci_dev)
{
char dir[128], name[128];
- int fd, r = 0, v;
+ int fd, r = 0;
FILE *f;
uint64_t start, end, size, flags;
uint16_t id;
PCIRegion *rp;
PCIDevRegions *dev = &pci_dev->real_device;
@@ -637,20 +637,24 @@ again:
}
fclose(f);
/* read and fill vendor ID */
- v = get_real_vendor_id(dir, &id);
- if (v) {
+ get_real_vendor_id(dir, &id, &local_err);
+ if (local_err) {
+ error_report("%s", error_get_pretty(local_err));
+ error_free(local_err);
return 1;
}
pci_dev->dev.config[0] = id & 0xff;
pci_dev->dev.config[1] = (id & 0xff00) >> 8;
/* read and fill device ID */
- v = get_real_device_id(dir, &id);
- if (v) {
+ get_real_device_id(dir, &id, &local_err);
+ if (local_err) {
+ error_report("%s", error_get_pretty(local_err));
+ error_free(local_err);
return 1;
}
pci_dev->dev.config[2] = id & 0xff;
pci_dev->dev.config[3] = (id & 0xff00) >> 8;
@@ -739,10 +743,11 @@ static void free_assigned_device(AssignedDevice *dev)
static char *assign_failed_examine(const AssignedDevice *dev)
{
char name[PATH_MAX], dir[PATH_MAX], driver[PATH_MAX] = {}, *ns;
uint16_t vendor_id, device_id;
int r;
+ Error *local_err = NULL;
snprintf(dir, sizeof(dir), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/",
dev->host.domain, dev->host.bus, dev->host.slot,
dev->host.function);
@@ -759,12 +764,16 @@ static char *assign_failed_examine(const AssignedDevice
*dev)
goto fail;
}
ns++;
- if (get_real_vendor_id(dir, &vendor_id) ||
- get_real_device_id(dir, &device_id)) {
+ if ((get_real_vendor_id(dir, &vendor_id, &local_err), local_err) ||
+ (get_real_device_id(dir, &device_id, &local_err), local_err)) {
+ /* We're already analyzing an assignment error, so we suppress this
+ * one just like the others above.
+ */
+ error_free(local_err);
goto fail;
}
return g_strdup_printf(
"*** The driver '%s' is occupying your device %04x:%02x:%02x.%x.\n"
--
1.8.3.1
- [Qemu-devel] [PATCH 06/16] pci-assign: propagate Error from check_irqchip_in_kernel(), (continued)
- [Qemu-devel] [PATCH 05/16] pci-assign: propagate errors from get_real_id(),
Laszlo Ersek <=
- [Qemu-devel] [PATCH 11/16] pci-assign: propagate errors from assigned_device_pci_cap_init(), Laszlo Ersek, 2014/04/10
- [Qemu-devel] [PATCH 13/16] pci-assign: propagate errors from assigned_dev_register_regions(), Laszlo Ersek, 2014/04/10
- [Qemu-devel] [PATCH 14/16] pci-assign: propagate errors from assign_device(), Laszlo Ersek, 2014/04/10
- [Qemu-devel] [PATCH 15/16] pci-assign: propagate errors from assign_intx(), Laszlo Ersek, 2014/04/10