ShuriZma
/
xemu
mirror of https://github.com/xemu-project/xemu.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

aux: fix break that wanted to break two levels out 

The last "ret = AUX_I2C_NACK;" is dead, because it is always overridden
by AUX_I2C_ACK.  What really the code wants is to jump out of the switch
statement, and a "return" will not cut it because it would omit a debug
printf.

Change the logic so that we can break out of the while loop.  For clarity,
hoist the bus->last_* assignments up, right after i2c_start_transfer.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Paolo Bonzini 2016-07-07 13:47:00 +01:00 committed by Peter Maydell
parent bb14a1eda0
commit 5229f45bd9
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
hw/misc/aux.c
View File

@ -153,12 +153,12 @@ AUXReply aux_request(AUXBus *bus, AUXCommand cmd, uint32_t address,
case WRITE_I2C_MOT: case WRITE_I2C_MOT:
case READ_I2C_MOT: case READ_I2C_MOT:
is_write = cmd == READ_I2C_MOT ? false : true; is_write = cmd == READ_I2C_MOT ? false : true;
ret = AUX_I2C_NACK;
if (!i2c_bus_busy(i2c_bus)) { if (!i2c_bus_busy(i2c_bus)) {
/* /*
* No transactions started.. * No transactions started..
*/ */
if (i2c_start_transfer(i2c_bus, address, is_write)) { if (i2c_start_transfer(i2c_bus, address, is_write)) {
ret = AUX_I2C_NACK;
break; break;
} }
} else if ((address != bus->last_i2c_address) || } else if ((address != bus->last_i2c_address) ||
@ -168,22 +168,22 @@ AUXReply aux_request(AUXBus *bus, AUXCommand cmd, uint32_t address,
*/ */
i2c_end_transfer(i2c_bus); i2c_end_transfer(i2c_bus);
if (i2c_start_transfer(i2c_bus, address, is_write)) { if (i2c_start_transfer(i2c_bus, address, is_write)) {
ret = AUX_I2C_NACK;
break; break;
} }
} }
bus->last_transaction = cmd;
bus->last_i2c_address = address;
while (len > 0) { while (len > 0) {
if (i2c_send_recv(i2c_bus, data++, is_write) < 0) { if (i2c_send_recv(i2c_bus, data++, is_write) < 0) {
ret = AUX_I2C_NACK;
i2c_end_transfer(i2c_bus); i2c_end_transfer(i2c_bus);
break; break;
} }
len--; len--;
} }
bus->last_transaction = cmd; if (len == 0) {
bus->last_i2c_address = address; ret = AUX_I2C_ACK;
ret = AUX_I2C_ACK; }
break; break;
default: default:
DPRINTF("Not implemented!\n"); DPRINTF("Not implemented!\n");