Showing error 1705

User: Jiri Slaby
Error type: Double Unlock
Error type description: Some lock is unlocked twice unintentionally in a sequence
File location: drivers/net/hamradio/baycom_ser_hdx.c
Line in file: 422
Project: Linux Kernel
Project version: 2.6.28
Tools: Smatch (1.59)
Entered: 2013-09-10 15:16:58 UTC

Source: 

392                        break;
393                        
394                case 4:
395                        inb(RBR(dev->base_addr));
396                        break;
397                        
398                case 2:
399                        /*
400                         * check if transmitter active
401                         */
402                        if (hdlcdrv_ptt(&bc->hdrv))
403                                ser12_tx(dev, bc);
404                        else {
405                                ser12_rx(dev, bc);
406                                bc->modem.arb_divider--;
407                        }
408                        outb(0x00, THR(dev->base_addr));
409                        break;
410                        
411                default:
412                        inb(MSR(dev->base_addr));
413                        break;
414                }
415                iir = inb(IIR(dev->base_addr));
416        } while (!(iir & 1));
417        if (bc->modem.arb_divider <= 0) {
418                bc->modem.arb_divider = SER12_ARB_DIVIDER(bc);
419                local_irq_enable();
420                hdlcdrv_arbitrate(dev, &bc->hdrv);
421        }
422        local_irq_enable();
423        hdlcdrv_transmitter(dev, &bc->hdrv);
424        hdlcdrv_receiver(dev, &bc->hdrv);
425        local_irq_disable();
426        return IRQ_HANDLED;
427}
428
429/* --------------------------------------------------------------------- */
430
431enum uart { c_uart_unknown, c_uart_8250,
432            c_uart_16450, c_uart_16550, c_uart_16550A};
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