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Minimise the time between dropping the read devlock and grabbing the write devlock to avoid tons of logging spam in the interim.

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This commit is contained in:
Con Kolivas 2013-10-08 00:01:26 +11:00
parent 97b5dd08b2
commit ef8efd6c48
2 changed files with 37 additions and 17 deletions
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8
miner.h
View File

@ -881,6 +881,14 @@ static inline void cg_runlock(cglock_t *lock)
rd_unlock(&lock->rwlock);
}
/* This drops the read lock and grabs a write lock. It does NOT protect data
* between the two locks! */
static inline void cg_ruwlock(cglock_t *lock)
{
rd_unlock_noyield(&lock->rwlock);
cg_wlock(lock);
}
static inline void cg_wunlock(cglock_t *lock)
{
wr_unlock_noyield(&lock->rwlock);

46
usbutils.c
View File

@ -1300,12 +1300,11 @@ static void release_cgpu(struct cgpu_info *cgpu)
{
struct cg_usb_device *cgusb = cgpu->usbdev;
struct cgpu_info *lookcgpu;
int i, pstate;
int i;
DEVWLOCK(cgpu, pstate);
// It has already been done
if (cgpu->usbinfo.nodev)
goto out_unlock;
return;
applog(LOG_DEBUG, "USB release %s%i",
cgpu->drv->name, cgpu->device_id);
@ -1335,8 +1334,6 @@ static void release_cgpu(struct cgpu_info *cgpu)
_usb_uninit(cgpu);
cgminer_usb_unlock_bd(cgpu->drv, cgpu->usbinfo.bus_number, cgpu->usbinfo.device_address);
out_unlock:
DEVWUNLOCK(cgpu, pstate);
}
/*
@ -2602,10 +2599,14 @@ out_unlock:
err = LIBUSB_ERROR_OTHER;
}
out_noerrmsg:
if (NODEV(err)) {
cg_ruwlock(&cgpu->usbinfo.devlock);
release_cgpu(cgpu);
cg_dwlock(&cgpu->usbinfo.devlock);
}
DEVRUNLOCK(cgpu, pstate);
if (NODEV(err))
release_cgpu(cgpu);
return err;
}
@ -2700,10 +2701,13 @@ int _usb_write(struct cgpu_info *cgpu, int intinfo, int epinfo, char *buf, size_
err = LIBUSB_ERROR_OTHER;
}
out_noerrmsg:
DEVRUNLOCK(cgpu, pstate);
if (NODEV(err))
if (NODEV(err)) {
cg_ruwlock(&cgpu->usbinfo.devlock);
release_cgpu(cgpu);
cg_dwlock(&cgpu->usbinfo.devlock);
}
DEVRUNLOCK(cgpu, pstate);
return err;
}
@ -2790,10 +2794,13 @@ int _usb_transfer(struct cgpu_info *cgpu, uint8_t request_type, uint8_t bRequest
err = __usb_transfer(cgpu, request_type, bRequest, wValue, wIndex, data, siz, timeout, cmd);
DEVRUNLOCK(cgpu, pstate);
if (NOCONTROLDEV(err))
if (NOCONTROLDEV(err)) {
cg_ruwlock(&cgpu->usbinfo.devlock);
release_cgpu(cgpu);
cg_dwlock(&cgpu->usbinfo.devlock);
}
DEVRUNLOCK(cgpu, pstate);
return err;
}
@ -2863,10 +2870,13 @@ int _usb_transfer_read(struct cgpu_info *cgpu, uint8_t request_type, uint8_t bRe
libusb_error_name(err));
}
out_noerrmsg:
DEVRUNLOCK(cgpu, pstate);
if (NOCONTROLDEV(err))
if (NOCONTROLDEV(err)) {
cg_ruwlock(&cgpu->usbinfo.devlock);
release_cgpu(cgpu);
cg_dwlock(&cgpu->usbinfo.devlock);
}
DEVRUNLOCK(cgpu, pstate);
return err;
}
@ -3132,7 +3142,7 @@ void usb_set_dev_start(struct cgpu_info *cgpu)
void usb_cleanup(void)
{
struct cgpu_info *cgpu;
int count;
int count, pstate;
int i;
hotplug_time = 0;
@ -3150,7 +3160,9 @@ void usb_cleanup(void)
case DRIVER_icarus:
case DRIVER_avalon:
case DRIVER_klondike:
DEVWLOCK(cgpu, pstate);
release_cgpu(cgpu);
DEVWUNLOCK(cgpu, pstate);
count++;
break;
default: